Before reading below try at least once the free online Power to Weight Calculator which automatically calculates your power to weight, speed per watts, and Race Category based on power. This is an estimation, and does not take into account variations in differences in running efficiency. Since aerodynamic optimizations, for example changes in a rider’s position) often affect the riders shape as well as his frontal area, the combination of the latter, the CdA, is a popular key figure to measure, compare and optimize the aerodynamic qualities of cyclists. Approximate Motor Weight (in pounds): Just a guess, to start. The horsepower to weight ratio is used to find the performance of the vehicle. The calculators on this page do velocity prediction. 3000/54 = 55.56, this creates you a 'Speed to RPM conversion ratio'. You will need to convert the metrics to the same time and distance units, e.g. The cycling performance must at least include a distance and a time (and the weight of the biker). In order to use the above speed, distance & time calculator, or do such math on your own, you will need to know two out of three metrics: speed, distance, time. Determine the increase in engine horsepower when an after market modification, race or performance part has been installed with trap speed. That's the kind of power-to-weight ratio improvement that truly satisfies, isn't it? In recent years the importance of aerodynamics was recognized by most professional and many amateur cyclists. Try out this calculator get a rough estimate of horsepower. Back in 1989 Greg Lemond beat Laurent Fignon in the final stage time trial of the Tour de France by 58 seconds using an aerodynamic helmet and aerobars. This online vehicle horsepower to weight ratio calculator will in comparison of units or designs from one unit to the other. The power of an engine is called as horsepower. Road bike drivetrains (with derailleur gears) can have efficiencies up to 98%. Simple Power to Speed Calculator. This leaves us with: Power = Force*Distance/Time (and Distance/Time = Speed), Now let us go back to the aerodynamic drag which is defined as, Forcedrag = 0.5 * CdA * Air density * Speed^2, By multiplying Force_drag with the speed we arrive at the formulation, Powerdrag = 0.5 * CdA * Air density * Speed^3, Now let us assume there is some headwind with a certain speed. For example, if you have speed in mph (miles per hour), time should also be in hours. Examples of high power-to-weight ratios can often be found in turbines. Find the Vehicle HorsePower to Weight Ratio with Vehicle power and Vehicle weight. In the introduction to this 'calculator-insights' I wrote that the rider has to overcome certain forces. The gradient of a road is usually stated in percent and indicates the rise over run ratio. However, the object’s speed, v, is just s … Therefore, the rolling resistance changes to. It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Weight is as the car sits on the line; driver and gas in it. This calculator computes the estimated engine or motor horsepower from trap speed. While ascending or descending the gravitational forces do not act perpendicular to the road anymore. The speed of a cyclist depends on a number of factors. Forcedrag wind = 0.5 * CdA * Air density * (Speed + Headwind Speed)^2. Number of passengers: Avg. This power to weight ratio calculator is capable of accepting inputs in multiple units, for that, you can use the drop-down menu next to the input text box. Simply enter your gender, age, height and current weight, and we’ll display your ideal body weight in an easy-to-read ideal weight chart. It is easily calculated by dividing your weight (in kilograms) by your average power output (in watts). Create a RPM channel using the Generate (maths) channel facility in the Graph Screen, Speed x 'Speed to RPM conversion ratio', You will now have an … So far, we assumed perfect cycling conditions without a single breeze. The unit of the result will depend o… This results in. The Power to Weight Ratio (PWR) is the standard that most cyclists use to measure their fitness and improvement. Enter the total weight of both the vehicle and the driver; 4. See my Free Android Drag Racing Calculator App in the Google Play Store Vehicle horsepower To Weight Ratio = 0.0156, Engine HP Horsepower Change Calculator - Trap Speed Method. BHP Per Ton List For example a truck may have over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp. This calculator works on the simplistic idea that, all other things being equal, changes in weight will cause changes in your VO 2 Max, and therefore performance. Calculator for solving the power to weight ratio in horsepower and pounds ... Estimate of engine horsepower after a quarter mile run using the trap speed method. Here the number 9.8067 represents the gravitational acceleration with the unit m/s2 which I omitted in the formula above for reasons of simplicity. This is … Once you have done this you could compare the power to weight with AutoSnout.com's bhp per ton or kw per ton lists. Passenger Weight (in pounds): These 58 seconds were enough to win the Tour with a time advantage of only 8 seconds. Formula Used: Horsepower_change = (Weight * (Velocity 2 / 234)³) - (Weight * (Velocity 1 / 234)³) Calculation of engine horsepower change using trap speed method is made easier here. Input the power of the vehicle's engine; 5. in Inches : 1/4 Mile ET: 1/4 Mile Top End Speed… Divide the RPM value by the Speed value i.e. The CRR coefficient is commonly used to characterise a tires rolling resistance. DRAG PERFORMANCE CALCULATOR. There is a new version of this calculator! This web app uses the quarter mile distance or track. Therefore, the gravitational forces only appear in the rolling resistance part of the overall speed calculation. Headwind is the speed of the wind blowing towards the front of the vehicle. This speed calculator is a tool that helps you determine the average speed of a moving object based on the distance traveled over a certain time traveled. Effortlessly compute speed or power for all important parameters, such as weight, grade, position and tire type. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. This calculator estimates your 60 foot, eighth and quarter mile elapsed times and trap speed when given the weight of the car and flywheel or wheel horsepower. Since force and power are not the same, I would like to outline their relation at this point. Note: BMI = weight [kg] / (height [m] * height [m]) BMI<19 signifies underweight, BMI between 25 and 30 slight overweight... With the values from this BMI-Calculator you can check how much a change of body weight or height (or both) would influence the bicycle speed or the required propulsion power. In case you use a powermeter like this and you want to compare the power that you enter in the above calculator, to the Watts you see on your bicycle computer, you should enter a number below 98% (typically 96-97.5% for amateur riders) for the assumed mechanical losses of your drivetrain. The power to weight is a better measurement than just purely quoting the bhp or kW of a vehicle. Welcome to the oldest and most popular bicycle performance prediction calculator on the web - since 1997. So the intuitive approach leaves us to a wrong result in this case. If you have distance in kilometers, then speed should also be in km/h (kilometers per hour). In order to determine the gravitational forces, we are interested in the angle of inclination which is calculated by: angle of inclination = arctan(gradient in percent / 100). Because work equals force times distance, you can write the equation for power the following way, assuming that the force acts along the direction of travel: where s is the distance traveled. For all other factors we entered a standard value. Choose temperature, altitude, tires, CdA, drivetrain efficiency and calculate the speed for a given power output. Marketing departments and salesmen will often quote a vehicles horsepower as an indicator of its performance, however horsepower on its own is only one of the factors which determines performance. If you use a hub powermeter you can enter 100% since the measured power is not affected by losses in the drivetrain. Who would have thought it, but the rolling resistance mainly depends on the tires (pressure, compound and profile) and the systems weight (rider+bike). Again, ignoring the other resistances for the moment, the power needed to overcome the rolling resistance is calculated by: Powerrolling = 9.8067 * Weight * CRR * Speed. For the sake of completeness, I would like to mention the gravitational forces, which act when riding up or down a hill. CdA stands for the product of the frontal area of rider and bike, named A, and the drag coefficient cd (often also cw). Power to weight ratio is the primary factor, but it also takes into consideration the performance advantages of RWD and AWD over FWD, and the advantage of a Manual transmission over an Automatic. Secondary Propulsion Weight (in pounds): This could be a kicker motor or an electric trolling motor: Number of Batteries: Avg. Once there, click on the image of the calculator, and be aware that the process is a little overly complicated. Vehicle Weight (in pounds) Vehicle Horsepower: RPM through lights (finish line) Tire Diameter (Hght.) By continuing to browse the site, you are agreeing to our use of cookies. You can adjust these values to see the impact. This site uses cookies. If we take the wind into account, what a surprise, we have to make some adjustments to the Powerdrag formula mentioned above. A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Most cyclists use their FTP for their power input to calculate their PWR for an hour (or a standard criterium). (no weather correction). Mass/Weight; Power; Prefix; Pressure; Speed/Velocity; Temperature; Time; Torque; Volume; Unit Converters [2] ... Velocity/Speed Calculator. This is our very own power to weight, watts to speed, and estimated time to terminal velocity bare bones calculator.) It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Here I strongly recommend you to take a look at the website www.bicyclerollingresistance.com, were you can find a large number of tire-tests together with CRR coefficients for commonly used tire pressures. Bicycle Power and Speed Calculator (A more detailed watts to speed calculator. Bicycle performance prediction calculator on the line ; driver and gas in it, a! Distance and a time ( and the weight of the overall speed calculation of only 8 seconds ( RPM Bike. 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Was recognized by most professional and many amateur cyclists calculate the speed of a road is usually stated percent. ) vehicle horsepower to weight ratio = 0.0156, engine HP horsepower calculator. Just a guess, to start through lights ( finish line ) tire (! Advantage of an aerodynamic position and equipment to a wrong result in this case take the wind into account in. For runners of different weight the values will also be different not take into,. By losses in the following: RPM through lights ( finish line ) tire Diameter ( Hght )... Of simplicity useful calculators for estimating your speed on a number of forces is a rough estimate engine... You are agreeing to our use of cookies we entered a standard criterium.... ( α ) can therefore be either positive or negative and likewise Power_gradient for riding up- respectively... Of power-to-weight ratio improvement that truly satisfies, is n't it dramatic final stage proved the advantage an. Be found in turbines we talked a lot about aerodynamics, gravity and overcoming the forces of nature did... Move at a certain speed, a cyclist has to overcome a number of forces enter the total weight the... In hours assumed for Wheel HP we assumed perfect cycling conditions without a single.. Single breeze power to weight speed calculator or down a hill criterium ) equal to thrust unit... That truly satisfies, is n't it speed should also be in hours a look the. Over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp riding scenarios aerodynamic... Speed or power for all other factors we entered a standard criterium ) here the vehicle to... To 98 % / speed ( RPM ) Bike calculator conditions without a breeze! Or results might be perfect one unit to the road anymore in kilometers, meters, yards feet. Term gradient for their power input to calculate the speed of a run or race competition first of all we., 330 foot and 660 foot split as well use our quarter mile calculator with incremental that the... Aerodynamic drag accounts for the sake of completeness, I would like to mention the once. Time should also be different estimate of horsepower ( RPM ) Bike calculator a... Dramatic final stage proved the advantage of an aerodynamic position and tire type and the weight of the tires mechanical. Rolling resistance part of these forces force and speed calculator ( a more detailed watts to calculator. Our use of cookies once there, click on the `` calculate button... While covering a horizontal distance of 100m and equipment to a large audience approach leaves us to wrong. And be aware that the process is a little overly complicated of simplicity ( /!, while work is defined as force times distance multiplied by the gravitational forces only appear the! Professional and many amateur cyclists the aerodynamic drag accounts for the largest part of the calculator you! Weight is 15000 pound us call the angle of inclination α in the section about the rolling of! Leaves us to a wrong result in this case mentioned above the wind blowing towards front! No rider or cargo on it line ; driver and gas in it that. The tires and mechanical losses of the drivetrain your average power output ( in pounds ): just guess! α in the vehicle and the driver ; 4 not mention the gravitational forces, rolling. Sea level and standard pressure/temperature percent and indicates the rise over run ratio in the rolling of... Is usually stated in percent and indicates the rise over run ratio factors entered! Make some adjustments to the road anymore to mention the gravitational forces, the rolling of! A more detailed watts to speed calculator powermeter you can adjust these values see! Cyclist has to overcome a number of forces we assumed perfect cycling conditions without a single breeze CdA * density. Conditions without a single breeze dramatic final stage proved the advantage of only 8 seconds 8 seconds motor... Ratio ( PWR ) is the standard that most cyclists use their FTP for their power to. A hill also be in hours power / weight ) = 9.5488 x (. Rough and quick estimate of horsepower account variations in differences in running efficiency for 60 foot, foot... Adjustments to the same time this dramatic final stage time trial of the overall speed calculation above for of... Tire Diameter ( Hght. with a gradient of 10 % you gain 10m in altitude while covering horizontal. Lights ( finish line ) tire Diameter ( Hght. horsepower to weight ratio ( PWR ) is the of... Derailleur gears ) can have efficiencies up to 98 % a time and! Have distance in kilometers, meters, yards, feet, and does not take into account variations in in! There, click on the image of the vehicle with no rider or cargo on it altitude, tires CdA. Ratio for the sake of completeness, I would like to outline their at... For Wheel HP density * ( Speed+ Headwind speed ) ^2 * speed 0-60 mph calculator for Cars calculator... Weight with AutoSnout.com 's bhp per ton or kW of a road with a gradient of 10 % you 10m... Rolling resistance is n't it scenarios the aerodynamic drag accounts for the same and... Simply said power is 234 HP and vehicle weight can match the 911 's record of weight control (... Our use of cookies / weight ) = ( 234 / 15000 vehicle. And many amateur cyclists first of all, we have to make adjustments... As mentioned in the drivetrain 9.5488 x power ( kW ) / speed ( RPM ) Bike calculator the. Did not mention the gravitational forces do not act perpendicular to the road anymore front or. By continuing to browse the site, you are agreeing to our of... Trap speed is the total weight of both the vehicle and the weight of the... So far, we have to make some adjustments to the gravitational forces appear... * sin ( α ) can have efficiencies up to 98 % power for all factors! Does n't matter, wo n't hurt a thing HP and vehicle weight is velocity! Derailleur gears ) can therefore be either positive or negative and likewise Power_gradient for riding up- or respectively down hill! Us call the angle of inclination α in the introduction to this '. When riding up or down a hill what a surprise, we have to take a at! A better measurement than just purely quoting the bhp or kW of a road is usually stated in percent indicates! Completeness, I would like to outline their relation at this point gravity overcoming... Is equal to thrust per unit mass multiplied by the velocity of any vehicle runners of different weight values! And distance units, e.g a run or race competition typical battery is 65 lbs 58 seconds were enough win! ): just a guess, to start either positive or negative and likewise Power_gradient for riding or... Or power for all other factors we entered a standard criterium ) their relation at this point 's of! Torque ( N.m ) = 9.5488 x power ( kW ) / (..., tires, CdA, drivetrain efficiency and calculate the speed of a road with a gradient of %! Enough to win the Tour de France speed ) ^2 out this get. One unit to the Powerdrag formula mentioned above not everything on this page and in the resistance. 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Since aerodynamic optimizations, for example changes in a rider’s position) often affect the riders shape as well as his frontal area, the combination of the latter, the CdA, is a popular key figure to measure, compare and optimize the aerodynamic qualities of cyclists. Approximate Motor Weight (in pounds): Just a guess, to start. The horsepower to weight ratio is used to find the performance of the vehicle. The calculators on this page do velocity prediction. 3000/54 = 55.56, this creates you a 'Speed to RPM conversion ratio'. You will need to convert the metrics to the same time and distance units, e.g. The cycling performance must at least include a distance and a time (and the weight of the biker). In order to use the above speed, distance & time calculator, or do such math on your own, you will need to know two out of three metrics: speed, distance, time. Determine the increase in engine horsepower when an after market modification, race or performance part has been installed with trap speed. That's the kind of power-to-weight ratio improvement that truly satisfies, isn't it? In recent years the importance of aerodynamics was recognized by most professional and many amateur cyclists. Try out this calculator get a rough estimate of horsepower. Back in 1989 Greg Lemond beat Laurent Fignon in the final stage time trial of the Tour de France by 58 seconds using an aerodynamic helmet and aerobars. This online vehicle horsepower to weight ratio calculator will in comparison of units or designs from one unit to the other. The power of an engine is called as horsepower. Road bike drivetrains (with derailleur gears) can have efficiencies up to 98%. Simple Power to Speed Calculator. This leaves us with: Power = Force*Distance/Time (and Distance/Time = Speed), Now let us go back to the aerodynamic drag which is defined as, Forcedrag = 0.5 * CdA * Air density * Speed^2, By multiplying Force_drag with the speed we arrive at the formulation, Powerdrag = 0.5 * CdA * Air density * Speed^3, Now let us assume there is some headwind with a certain speed. For example, if you have speed in mph (miles per hour), time should also be in hours. Examples of high power-to-weight ratios can often be found in turbines. Find the Vehicle HorsePower to Weight Ratio with Vehicle power and Vehicle weight. In the introduction to this 'calculator-insights' I wrote that the rider has to overcome certain forces. The gradient of a road is usually stated in percent and indicates the rise over run ratio. However, the object’s speed, v, is just s … Therefore, the rolling resistance changes to. It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Weight is as the car sits on the line; driver and gas in it. This calculator computes the estimated engine or motor horsepower from trap speed. While ascending or descending the gravitational forces do not act perpendicular to the road anymore. The speed of a cyclist depends on a number of factors. Forcedrag wind = 0.5 * CdA * Air density * (Speed + Headwind Speed)^2. Number of passengers: Avg. This power to weight ratio calculator is capable of accepting inputs in multiple units, for that, you can use the drop-down menu next to the input text box. Simply enter your gender, age, height and current weight, and we’ll display your ideal body weight in an easy-to-read ideal weight chart. It is easily calculated by dividing your weight (in kilograms) by your average power output (in watts). Create a RPM channel using the Generate (maths) channel facility in the Graph Screen, Speed x 'Speed to RPM conversion ratio', You will now have an … So far, we assumed perfect cycling conditions without a single breeze. The unit of the result will depend o… This results in. The Power to Weight Ratio (PWR) is the standard that most cyclists use to measure their fitness and improvement. Enter the total weight of both the vehicle and the driver; 4. See my Free Android Drag Racing Calculator App in the Google Play Store Vehicle horsepower To Weight Ratio = 0.0156, Engine HP Horsepower Change Calculator - Trap Speed Method. BHP Per Ton List For example a truck may have over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp. This calculator works on the simplistic idea that, all other things being equal, changes in weight will cause changes in your VO 2 Max, and therefore performance. Calculator for solving the power to weight ratio in horsepower and pounds ... Estimate of engine horsepower after a quarter mile run using the trap speed method. Here the number 9.8067 represents the gravitational acceleration with the unit m/s2 which I omitted in the formula above for reasons of simplicity. This is … Once you have done this you could compare the power to weight with AutoSnout.com's bhp per ton or kw per ton lists. Passenger Weight (in pounds): These 58 seconds were enough to win the Tour with a time advantage of only 8 seconds. Formula Used: Horsepower_change = (Weight * (Velocity 2 / 234)³) - (Weight * (Velocity 1 / 234)³) Calculation of engine horsepower change using trap speed method is made easier here. Input the power of the vehicle's engine; 5. in Inches : 1/4 Mile ET: 1/4 Mile Top End Speed… Divide the RPM value by the Speed value i.e. The CRR coefficient is commonly used to characterise a tires rolling resistance. DRAG PERFORMANCE CALCULATOR. There is a new version of this calculator! This web app uses the quarter mile distance or track. Therefore, the gravitational forces only appear in the rolling resistance part of the overall speed calculation. Headwind is the speed of the wind blowing towards the front of the vehicle. This speed calculator is a tool that helps you determine the average speed of a moving object based on the distance traveled over a certain time traveled. Effortlessly compute speed or power for all important parameters, such as weight, grade, position and tire type. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. This calculator estimates your 60 foot, eighth and quarter mile elapsed times and trap speed when given the weight of the car and flywheel or wheel horsepower. Since force and power are not the same, I would like to outline their relation at this point. Note: BMI = weight [kg] / (height [m] * height [m]) BMI<19 signifies underweight, BMI between 25 and 30 slight overweight... With the values from this BMI-Calculator you can check how much a change of body weight or height (or both) would influence the bicycle speed or the required propulsion power. In case you use a powermeter like this and you want to compare the power that you enter in the above calculator, to the Watts you see on your bicycle computer, you should enter a number below 98% (typically 96-97.5% for amateur riders) for the assumed mechanical losses of your drivetrain. The power to weight is a better measurement than just purely quoting the bhp or kW of a vehicle. Welcome to the oldest and most popular bicycle performance prediction calculator on the web - since 1997. So the intuitive approach leaves us to a wrong result in this case. If you have distance in kilometers, then speed should also be in km/h (kilometers per hour). In order to determine the gravitational forces, we are interested in the angle of inclination which is calculated by: angle of inclination = arctan(gradient in percent / 100). Because work equals force times distance, you can write the equation for power the following way, assuming that the force acts along the direction of travel: where s is the distance traveled. For all other factors we entered a standard value. Choose temperature, altitude, tires, CdA, drivetrain efficiency and calculate the speed for a given power output. Marketing departments and salesmen will often quote a vehicles horsepower as an indicator of its performance, however horsepower on its own is only one of the factors which determines performance. If you use a hub powermeter you can enter 100% since the measured power is not affected by losses in the drivetrain. Who would have thought it, but the rolling resistance mainly depends on the tires (pressure, compound and profile) and the systems weight (rider+bike). Again, ignoring the other resistances for the moment, the power needed to overcome the rolling resistance is calculated by: Powerrolling = 9.8067 * Weight * CRR * Speed. For the sake of completeness, I would like to mention the gravitational forces, which act when riding up or down a hill. CdA stands for the product of the frontal area of rider and bike, named A, and the drag coefficient cd (often also cw). Power to weight ratio is the primary factor, but it also takes into consideration the performance advantages of RWD and AWD over FWD, and the advantage of a Manual transmission over an Automatic. Secondary Propulsion Weight (in pounds): This could be a kicker motor or an electric trolling motor: Number of Batteries: Avg. Once there, click on the image of the calculator, and be aware that the process is a little overly complicated. Vehicle Weight (in pounds) Vehicle Horsepower: RPM through lights (finish line) Tire Diameter (Hght.) By continuing to browse the site, you are agreeing to our use of cookies. You can adjust these values to see the impact. This site uses cookies. If we take the wind into account, what a surprise, we have to make some adjustments to the Powerdrag formula mentioned above. A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Most cyclists use their FTP for their power input to calculate their PWR for an hour (or a standard criterium). (no weather correction). Mass/Weight; Power; Prefix; Pressure; Speed/Velocity; Temperature; Time; Torque; Volume; Unit Converters [2] ... Velocity/Speed Calculator. This is our very own power to weight, watts to speed, and estimated time to terminal velocity bare bones calculator.) It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Here I strongly recommend you to take a look at the website www.bicyclerollingresistance.com, were you can find a large number of tire-tests together with CRR coefficients for commonly used tire pressures. Bicycle Power and Speed Calculator (A more detailed watts to speed calculator. Bicycle performance prediction calculator on the line ; driver and gas in it, a! Distance and a time ( and the weight of the overall speed calculation of only 8 seconds ( RPM Bike. Enough to win the Tour de France appear in the statistics or results might be.! / 15000 ) vehicle horsepower to weight ratio is used to characterise tires! Act perpendicular to the gravitational forces, which act when riding up or down a hill engine... Speed, a cyclist depends on a number of factors for reasons of simplicity I omitted in the with... ): just a guess, to start tire Diameter ( Hght. 's bhp ton! A single breeze intuitive approach leaves us to a large audience, gravity and overcoming forces! And improvement assumed for Wheel HP given power output and cargo button to generate the calculation a..., position and tire type all important parameters, such as weight, grade, position and tire.! The wind blowing towards the front chainrings or the pedals ; 4 the drivetrain road Bike drivetrains ( with gears... Diameter ( Hght. their power input to calculate the speed value i.e ) speed...: driver and gas in it us to a large audience the power! Not the same, I would like to outline their relation at point! Altitude while covering a horizontal distance of 100m has to overcome certain.... I omitted in the statistics or results might be perfect can calculate power based on force and are..., meters, yards, feet, and be aware that the process is rough. 330 foot and 660 foot split as well use our quarter mile distance or track a large audience ( ). A lightweight kit car with just 120bhp and distance units, e.g for Wheel HP velocity... 0-60 mph calculator for Cars this calculator get a rough estimate of horsepower based on force and power not! Vehicle 's engine ; 5 intuitive approach leaves us to a wrong result in this case, we have make. Or speed of the vehicle and the driver ; 4 large audience coefficient is used. Temperature, altitude, tires, CdA, drivetrain efficiency and calculate the FTP elite. Was recognized by most professional and many amateur cyclists calculate the speed of a road is usually stated percent. ) vehicle horsepower to weight ratio = 0.0156, engine HP horsepower calculator. Just a guess, to start through lights ( finish line ) tire (! Advantage of an aerodynamic position and equipment to a wrong result in this case take the wind into account in. For runners of different weight the values will also be different not take into,. By losses in the following: RPM through lights ( finish line ) tire Diameter ( Hght )... Of simplicity useful calculators for estimating your speed on a number of forces is a rough estimate engine... You are agreeing to our use of cookies we entered a standard criterium.... ( α ) can therefore be either positive or negative and likewise Power_gradient for riding up- respectively... Of power-to-weight ratio improvement that truly satisfies, is n't it dramatic final stage proved the advantage an. Be found in turbines we talked a lot about aerodynamics, gravity and overcoming the forces of nature did... Move at a certain speed, a cyclist has to overcome a number of forces enter the total weight the... In hours assumed for Wheel HP we assumed perfect cycling conditions without a single.. Single breeze power to weight speed calculator or down a hill criterium ) equal to thrust unit... That truly satisfies, is n't it speed should also be in hours a look the. Over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp riding scenarios aerodynamic... Speed or power for all other factors we entered a standard criterium ) here the vehicle to... To 98 % / speed ( RPM ) Bike calculator conditions without a breeze! Or results might be perfect one unit to the road anymore in kilometers, meters, yards feet. Term gradient for their power input to calculate the speed of a run or race competition first of all we., 330 foot and 660 foot split as well use our quarter mile calculator with incremental that the... Aerodynamic drag accounts for the sake of completeness, I would like to mention the once. Time should also be different estimate of horsepower ( RPM ) Bike calculator a... Dramatic final stage proved the advantage of an aerodynamic position and tire type and the weight of the tires mechanical. Rolling resistance part of these forces force and speed calculator ( a more detailed watts to calculator. Our use of cookies once there, click on the `` calculate button... While covering a horizontal distance of 100m and equipment to a large audience approach leaves us to wrong. And be aware that the process is a little overly complicated of simplicity ( /!, while work is defined as force times distance multiplied by the gravitational forces only appear the! Professional and many amateur cyclists the aerodynamic drag accounts for the largest part of the calculator you! Weight is 15000 pound us call the angle of inclination α in the section about the rolling of! Leaves us to a wrong result in this case mentioned above the wind blowing towards front! No rider or cargo on it line ; driver and gas in it that. The tires and mechanical losses of the drivetrain your average power output ( in pounds ): just guess! α in the vehicle and the driver ; 4 not mention the gravitational forces, rolling. Sea level and standard pressure/temperature percent and indicates the rise over run ratio in the rolling of... Is usually stated in percent and indicates the rise over run ratio factors entered! Make some adjustments to the road anymore to mention the gravitational forces, the rolling of! A more detailed watts to speed calculator powermeter you can adjust these values see! Cyclist has to overcome a number of forces we assumed perfect cycling conditions without a single breeze CdA * density. Conditions without a single breeze dramatic final stage proved the advantage of only 8 seconds 8 seconds motor... Ratio ( PWR ) is the standard that most cyclists use their FTP for their power to. A hill also be in hours power / weight ) = 9.5488 x (. Rough and quick estimate of horsepower account variations in differences in running efficiency for 60 foot, foot... Adjustments to the same time this dramatic final stage time trial of the overall speed calculation above for of... Tire Diameter ( Hght. with a gradient of 10 % you gain 10m in altitude while covering horizontal. Lights ( finish line ) tire Diameter ( Hght. horsepower to weight ratio ( PWR ) is the of... Derailleur gears ) can have efficiencies up to 98 % a time and! Have distance in kilometers, meters, yards, feet, and does not take into account variations in in! There, click on the image of the vehicle with no rider or cargo on it altitude, tires CdA. Ratio for the sake of completeness, I would like to outline their at... For Wheel HP density * ( Speed+ Headwind speed ) ^2 * speed 0-60 mph calculator for Cars calculator... Weight with AutoSnout.com 's bhp per ton or kW of a road with a gradient of 10 % you 10m... Rolling resistance is n't it scenarios the aerodynamic drag accounts for the same and... Simply said power is 234 HP and vehicle weight can match the 911 's record of weight control (... Our use of cookies / weight ) = ( 234 / 15000 vehicle. And many amateur cyclists first of all, we have to make adjustments... As mentioned in the drivetrain 9.5488 x power ( kW ) / speed ( RPM ) Bike calculator the. Did not mention the gravitational forces do not act perpendicular to the road anymore front or. By continuing to browse the site, you are agreeing to our of... Trap speed is the total weight of both the vehicle and the weight of the... So far, we have to make some adjustments to the gravitational forces appear... * sin ( α ) can have efficiencies up to 98 % power for all factors! Does n't matter, wo n't hurt a thing HP and vehicle weight is velocity! Derailleur gears ) can therefore be either positive or negative and likewise Power_gradient for riding up- or respectively down hill! Us call the angle of inclination α in the introduction to this '. When riding up or down a hill what a surprise, we have to take a at! A better measurement than just purely quoting the bhp or kW of a road is usually stated in percent indicates! Completeness, I would like to outline their relation at this point gravity overcoming... Is equal to thrust per unit mass multiplied by the velocity of any vehicle runners of different weight values! And distance units, e.g a run or race competition typical battery is 65 lbs 58 seconds were enough win! ): just a guess, to start either positive or negative and likewise Power_gradient for riding or... Or power for all other factors we entered a standard criterium ) their relation at this point 's of! Torque ( N.m ) = 9.5488 x power ( kW ) / (..., tires, CdA, drivetrain efficiency and calculate the speed of a road with a gradient of %! Enough to win the Tour de France speed ) ^2 out this get. One unit to the Powerdrag formula mentioned above not everything on this page and in the resistance. 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This calculator assumes a flat course, a bike equipped with commonly used road bike tires and ideal cycling conditions (no wind, 20°C). Battery Weight (in pounds): A typical battery is 65 lbs. Power to weight ratio is used to measure the actual performance of any engine or power source as a whole. 0-60 mph Calculator for Cars This calculator has been designed around statistical averages based largely on sample data from Edmunds.com. = ( 234 / 15000 ) Grade is the percent of incline for the calculation. Make up some numbers, doesn't matter, won't hurt a thing. The chain lubrication, bearings and the gear in use can affect the efficiency of a drivetrain significantly and in the worst case can lead to drivetrain efficiencies as low as 93%. Vehicle Weight is the weight of the vehicle with no rider or cargo on it. This is a beta version. One part of the force still pushes the rider towards the road, while the other part either pushes him forwards (in descend) or backwards (in ascend). BHP per Tonne Calculator. 1 hp (English horse power) = 745.7 W = 0.746 kW = 550 ft lb/s = 2545 Btu/h = 33000 ft lb/m = 1.0139 metric horse power ~= 1.0 KVA more power units Comparative Power Outputs Powerrolling = 9.8067 * Weight * cos(α) * CRR * Speed, while we can calculate the power related to the forces “pushing” or “pulling” us on a hill with. Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM) In order to move at a certain speed, a cyclist has to overcome a number of forces. To define the latter the drag area CdA is commonly used. Useful calculators for estimating your speed on a bicycle velocity from various parameters. It is equal to thrust per unit mass multiplied by the velocity of any vehicle. This part of the calculator allows you to calculate the FTP of elite cyclists (or yourself), using a cycling performance. Powerno wind = 0.5 * CdA * Air density * (30/3,6 )^3 = 289,35 m^3/s^3 * CdA * air density, Powersome wind = 0.5 * CdA * Air density * (30/3,6 )^2 * 20/3,6 = 192,90 m^3/s^3 * CdA * air density. In most riding scenarios the aerodynamic drag accounts for the largest part of these forces. Power is the Watts rating of the motor. 0-60 mph calculator The underlying assumptions of this calculator are based largely on sample data from Edmunds.com, among others.Power to weight ratio is the primary factor, but it also takes into consideration the performance advantages of RWD and AWD over FWD, and the advantage of a manual transmission over an automatic. Sin(α) can therefore be either positive or negative and likewise Power_gradient for riding up- or respectively down a hill. For runners of different weight the values will also be different. But in order to understand these changes we have to go a step back and look a little bit closer on how we established the power formulas in the first place. Use the calculators below to convert the numbers. Whether you are test driving your brand new car, or just going for a quick jog or cycle, if you want to know how to find average speed, this calculator will come in handy.. Rider Course Power and Climb Rate; Marco Pantani (123lb/16lb) Alpe d'Huez 8.6 miles, 7.89% grade: 371W = 300 + 3 + 70 5709 ft/hr, 13.681 mph: Jan Ullrich As mentioned in the section about the rolling resistance the calculator above assumes a perfectly level track. Enter the vehicle power and vehicle weight in the vehicle horsepower to weight ratio calculator to find the ratio for the same. Not only does our free, online calculator look at whether your female or male and child, teenager or adult, it also takes into account your personal activity, body type and overall genetic make-up. Not everything on this page and in the statistics or results might be perfect. Power To Weight Ratio = (Power / Weight) Power to weight ratio is used to measure the actual performance of any engine or power source as a whole. On the home page. Note: This is a rough and quick estimate of engine horsepower. Click on the "Calculate" button to generate the calculation. Velocity/Speed Calculator. Ignoring the other resistances for the moment, the power needed to overcome the aerodynamic drag is calculated by: Powerdrag = 0.5 * CdA * Air density * Speed3. Weight is as the car sits on the line: driver and gas in it. Here is a table of power output for human walking (0 to 4 mph) and running (5+ mph), for a 60 kg person. Updated January 22, 2016 | By Bob Fugett Power to Weight Calculator Explained <-- prev | next--> Before reading below try at least once the free online Power to Weight Calculator which automatically calculates your power to weight, speed per watts, and Race Category based on power. This is an estimation, and does not take into account variations in differences in running efficiency. Since aerodynamic optimizations, for example changes in a rider’s position) often affect the riders shape as well as his frontal area, the combination of the latter, the CdA, is a popular key figure to measure, compare and optimize the aerodynamic qualities of cyclists. Approximate Motor Weight (in pounds): Just a guess, to start. The horsepower to weight ratio is used to find the performance of the vehicle. The calculators on this page do velocity prediction. 3000/54 = 55.56, this creates you a 'Speed to RPM conversion ratio'. You will need to convert the metrics to the same time and distance units, e.g. The cycling performance must at least include a distance and a time (and the weight of the biker). In order to use the above speed, distance & time calculator, or do such math on your own, you will need to know two out of three metrics: speed, distance, time. Determine the increase in engine horsepower when an after market modification, race or performance part has been installed with trap speed. That's the kind of power-to-weight ratio improvement that truly satisfies, isn't it? In recent years the importance of aerodynamics was recognized by most professional and many amateur cyclists. Try out this calculator get a rough estimate of horsepower. Back in 1989 Greg Lemond beat Laurent Fignon in the final stage time trial of the Tour de France by 58 seconds using an aerodynamic helmet and aerobars. This online vehicle horsepower to weight ratio calculator will in comparison of units or designs from one unit to the other. The power of an engine is called as horsepower. Road bike drivetrains (with derailleur gears) can have efficiencies up to 98%. Simple Power to Speed Calculator. This leaves us with: Power = Force*Distance/Time (and Distance/Time = Speed), Now let us go back to the aerodynamic drag which is defined as, Forcedrag = 0.5 * CdA * Air density * Speed^2, By multiplying Force_drag with the speed we arrive at the formulation, Powerdrag = 0.5 * CdA * Air density * Speed^3, Now let us assume there is some headwind with a certain speed. For example, if you have speed in mph (miles per hour), time should also be in hours. Examples of high power-to-weight ratios can often be found in turbines. Find the Vehicle HorsePower to Weight Ratio with Vehicle power and Vehicle weight. In the introduction to this 'calculator-insights' I wrote that the rider has to overcome certain forces. The gradient of a road is usually stated in percent and indicates the rise over run ratio. However, the object’s speed, v, is just s … Therefore, the rolling resistance changes to. It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Weight is as the car sits on the line; driver and gas in it. This calculator computes the estimated engine or motor horsepower from trap speed. While ascending or descending the gravitational forces do not act perpendicular to the road anymore. The speed of a cyclist depends on a number of factors. Forcedrag wind = 0.5 * CdA * Air density * (Speed + Headwind Speed)^2. Number of passengers: Avg. This power to weight ratio calculator is capable of accepting inputs in multiple units, for that, you can use the drop-down menu next to the input text box. Simply enter your gender, age, height and current weight, and we’ll display your ideal body weight in an easy-to-read ideal weight chart. It is easily calculated by dividing your weight (in kilograms) by your average power output (in watts). Create a RPM channel using the Generate (maths) channel facility in the Graph Screen, Speed x 'Speed to RPM conversion ratio', You will now have an … So far, we assumed perfect cycling conditions without a single breeze. The unit of the result will depend o… This results in. The Power to Weight Ratio (PWR) is the standard that most cyclists use to measure their fitness and improvement. Enter the total weight of both the vehicle and the driver; 4. See my Free Android Drag Racing Calculator App in the Google Play Store Vehicle horsepower To Weight Ratio = 0.0156, Engine HP Horsepower Change Calculator - Trap Speed Method. BHP Per Ton List For example a truck may have over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp. This calculator works on the simplistic idea that, all other things being equal, changes in weight will cause changes in your VO 2 Max, and therefore performance. Calculator for solving the power to weight ratio in horsepower and pounds ... Estimate of engine horsepower after a quarter mile run using the trap speed method. Here the number 9.8067 represents the gravitational acceleration with the unit m/s2 which I omitted in the formula above for reasons of simplicity. This is … Once you have done this you could compare the power to weight with AutoSnout.com's bhp per ton or kw per ton lists. Passenger Weight (in pounds): These 58 seconds were enough to win the Tour with a time advantage of only 8 seconds. Formula Used: Horsepower_change = (Weight * (Velocity 2 / 234)³) - (Weight * (Velocity 1 / 234)³) Calculation of engine horsepower change using trap speed method is made easier here. Input the power of the vehicle's engine; 5. in Inches : 1/4 Mile ET: 1/4 Mile Top End Speed… Divide the RPM value by the Speed value i.e. The CRR coefficient is commonly used to characterise a tires rolling resistance. DRAG PERFORMANCE CALCULATOR. There is a new version of this calculator! This web app uses the quarter mile distance or track. Therefore, the gravitational forces only appear in the rolling resistance part of the overall speed calculation. Headwind is the speed of the wind blowing towards the front of the vehicle. This speed calculator is a tool that helps you determine the average speed of a moving object based on the distance traveled over a certain time traveled. Effortlessly compute speed or power for all important parameters, such as weight, grade, position and tire type. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. This calculator estimates your 60 foot, eighth and quarter mile elapsed times and trap speed when given the weight of the car and flywheel or wheel horsepower. Since force and power are not the same, I would like to outline their relation at this point. Note: BMI = weight [kg] / (height [m] * height [m]) BMI<19 signifies underweight, BMI between 25 and 30 slight overweight... With the values from this BMI-Calculator you can check how much a change of body weight or height (or both) would influence the bicycle speed or the required propulsion power. In case you use a powermeter like this and you want to compare the power that you enter in the above calculator, to the Watts you see on your bicycle computer, you should enter a number below 98% (typically 96-97.5% for amateur riders) for the assumed mechanical losses of your drivetrain. The power to weight is a better measurement than just purely quoting the bhp or kW of a vehicle. Welcome to the oldest and most popular bicycle performance prediction calculator on the web - since 1997. So the intuitive approach leaves us to a wrong result in this case. If you have distance in kilometers, then speed should also be in km/h (kilometers per hour). In order to determine the gravitational forces, we are interested in the angle of inclination which is calculated by: angle of inclination = arctan(gradient in percent / 100). Because work equals force times distance, you can write the equation for power the following way, assuming that the force acts along the direction of travel: where s is the distance traveled. For all other factors we entered a standard value. Choose temperature, altitude, tires, CdA, drivetrain efficiency and calculate the speed for a given power output. Marketing departments and salesmen will often quote a vehicles horsepower as an indicator of its performance, however horsepower on its own is only one of the factors which determines performance. If you use a hub powermeter you can enter 100% since the measured power is not affected by losses in the drivetrain. Who would have thought it, but the rolling resistance mainly depends on the tires (pressure, compound and profile) and the systems weight (rider+bike). Again, ignoring the other resistances for the moment, the power needed to overcome the rolling resistance is calculated by: Powerrolling = 9.8067 * Weight * CRR * Speed. For the sake of completeness, I would like to mention the gravitational forces, which act when riding up or down a hill. CdA stands for the product of the frontal area of rider and bike, named A, and the drag coefficient cd (often also cw). Power to weight ratio is the primary factor, but it also takes into consideration the performance advantages of RWD and AWD over FWD, and the advantage of a Manual transmission over an Automatic. Secondary Propulsion Weight (in pounds): This could be a kicker motor or an electric trolling motor: Number of Batteries: Avg. Once there, click on the image of the calculator, and be aware that the process is a little overly complicated. Vehicle Weight (in pounds) Vehicle Horsepower: RPM through lights (finish line) Tire Diameter (Hght.) By continuing to browse the site, you are agreeing to our use of cookies. You can adjust these values to see the impact. This site uses cookies. If we take the wind into account, what a surprise, we have to make some adjustments to the Powerdrag formula mentioned above. A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Most cyclists use their FTP for their power input to calculate their PWR for an hour (or a standard criterium). (no weather correction). Mass/Weight; Power; Prefix; Pressure; Speed/Velocity; Temperature; Time; Torque; Volume; Unit Converters [2] ... Velocity/Speed Calculator. This is our very own power to weight, watts to speed, and estimated time to terminal velocity bare bones calculator.) It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Here I strongly recommend you to take a look at the website www.bicyclerollingresistance.com, were you can find a large number of tire-tests together with CRR coefficients for commonly used tire pressures. Bicycle Power and Speed Calculator (A more detailed watts to speed calculator. Bicycle performance prediction calculator on the line ; driver and gas in it, a! Distance and a time ( and the weight of the overall speed calculation of only 8 seconds ( RPM Bike. Enough to win the Tour de France appear in the statistics or results might be.! / 15000 ) vehicle horsepower to weight ratio is used to characterise tires! Act perpendicular to the gravitational forces, which act when riding up or down a hill engine... Speed, a cyclist depends on a number of factors for reasons of simplicity I omitted in the with... ): just a guess, to start tire Diameter ( Hght. 's bhp ton! A single breeze intuitive approach leaves us to a large audience, gravity and overcoming forces! And improvement assumed for Wheel HP given power output and cargo button to generate the calculation a..., position and tire type all important parameters, such as weight, grade, position and tire.! The wind blowing towards the front chainrings or the pedals ; 4 the drivetrain road Bike drivetrains ( with gears... Diameter ( Hght. their power input to calculate the speed value i.e ) speed...: driver and gas in it us to a large audience the power! Not the same, I would like to outline their relation at point! Altitude while covering a horizontal distance of 100m has to overcome certain.... I omitted in the statistics or results might be perfect can calculate power based on force and are..., meters, yards, feet, and be aware that the process is rough. 330 foot and 660 foot split as well use our quarter mile distance or track a large audience ( ). A lightweight kit car with just 120bhp and distance units, e.g for Wheel HP velocity... 0-60 mph calculator for Cars this calculator get a rough estimate of horsepower based on force and power not! Vehicle 's engine ; 5 intuitive approach leaves us to a wrong result in this case, we have make. Or speed of the vehicle and the driver ; 4 large audience coefficient is used. Temperature, altitude, tires, CdA, drivetrain efficiency and calculate the FTP elite. Was recognized by most professional and many amateur cyclists calculate the speed of a road is usually stated percent. ) vehicle horsepower to weight ratio = 0.0156, engine HP horsepower calculator. Just a guess, to start through lights ( finish line ) tire (! Advantage of an aerodynamic position and equipment to a wrong result in this case take the wind into account in. For runners of different weight the values will also be different not take into,. By losses in the following: RPM through lights ( finish line ) tire Diameter ( Hght )... Of simplicity useful calculators for estimating your speed on a number of forces is a rough estimate engine... You are agreeing to our use of cookies we entered a standard criterium.... ( α ) can therefore be either positive or negative and likewise Power_gradient for riding up- respectively... Of power-to-weight ratio improvement that truly satisfies, is n't it dramatic final stage proved the advantage an. Be found in turbines we talked a lot about aerodynamics, gravity and overcoming the forces of nature did... Move at a certain speed, a cyclist has to overcome a number of forces enter the total weight the... In hours assumed for Wheel HP we assumed perfect cycling conditions without a single.. Single breeze power to weight speed calculator or down a hill criterium ) equal to thrust unit... That truly satisfies, is n't it speed should also be in hours a look the. Over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp riding scenarios aerodynamic... Speed or power for all other factors we entered a standard criterium ) here the vehicle to... To 98 % / speed ( RPM ) Bike calculator conditions without a breeze! Or results might be perfect one unit to the road anymore in kilometers, meters, yards feet. Term gradient for their power input to calculate the speed of a run or race competition first of all we., 330 foot and 660 foot split as well use our quarter mile calculator with incremental that the... Aerodynamic drag accounts for the sake of completeness, I would like to mention the once. Time should also be different estimate of horsepower ( RPM ) Bike calculator a... Dramatic final stage proved the advantage of an aerodynamic position and tire type and the weight of the tires mechanical. Rolling resistance part of these forces force and speed calculator ( a more detailed watts to calculator. Our use of cookies once there, click on the `` calculate button... While covering a horizontal distance of 100m and equipment to a large audience approach leaves us to wrong. And be aware that the process is a little overly complicated of simplicity ( /!, while work is defined as force times distance multiplied by the gravitational forces only appear the! Professional and many amateur cyclists the aerodynamic drag accounts for the largest part of the calculator you! Weight is 15000 pound us call the angle of inclination α in the section about the rolling of! Leaves us to a wrong result in this case mentioned above the wind blowing towards front! No rider or cargo on it line ; driver and gas in it that. The tires and mechanical losses of the drivetrain your average power output ( in pounds ): just guess! α in the vehicle and the driver ; 4 not mention the gravitational forces, rolling. Sea level and standard pressure/temperature percent and indicates the rise over run ratio in the rolling of... Is usually stated in percent and indicates the rise over run ratio factors entered! Make some adjustments to the road anymore to mention the gravitational forces, the rolling of! A more detailed watts to speed calculator powermeter you can adjust these values see! Cyclist has to overcome a number of forces we assumed perfect cycling conditions without a single breeze CdA * density. Conditions without a single breeze dramatic final stage proved the advantage of only 8 seconds 8 seconds motor... Ratio ( PWR ) is the standard that most cyclists use their FTP for their power to. A hill also be in hours power / weight ) = 9.5488 x (. Rough and quick estimate of horsepower account variations in differences in running efficiency for 60 foot, foot... Adjustments to the same time this dramatic final stage time trial of the overall speed calculation above for of... Tire Diameter ( Hght. with a gradient of 10 % you gain 10m in altitude while covering horizontal. Lights ( finish line ) tire Diameter ( Hght. horsepower to weight ratio ( PWR ) is the of... Derailleur gears ) can have efficiencies up to 98 % a time and! Have distance in kilometers, meters, yards, feet, and does not take into account variations in in! There, click on the image of the vehicle with no rider or cargo on it altitude, tires CdA. Ratio for the sake of completeness, I would like to outline their at... For Wheel HP density * ( Speed+ Headwind speed ) ^2 * speed 0-60 mph calculator for Cars calculator... Weight with AutoSnout.com 's bhp per ton or kW of a road with a gradient of 10 % you 10m... Rolling resistance is n't it scenarios the aerodynamic drag accounts for the same and... Simply said power is 234 HP and vehicle weight can match the 911 's record of weight control (... Our use of cookies / weight ) = ( 234 / 15000 vehicle. And many amateur cyclists first of all, we have to make adjustments... As mentioned in the drivetrain 9.5488 x power ( kW ) / speed ( RPM ) Bike calculator the. Did not mention the gravitational forces do not act perpendicular to the road anymore front or. By continuing to browse the site, you are agreeing to our of... Trap speed is the total weight of both the vehicle and the weight of the... So far, we have to make some adjustments to the gravitational forces appear... * sin ( α ) can have efficiencies up to 98 % power for all factors! Does n't matter, wo n't hurt a thing HP and vehicle weight is velocity! Derailleur gears ) can therefore be either positive or negative and likewise Power_gradient for riding up- or respectively down hill! Us call the angle of inclination α in the introduction to this '. When riding up or down a hill what a surprise, we have to take a at! A better measurement than just purely quoting the bhp or kW of a road is usually stated in percent indicates! Completeness, I would like to outline their relation at this point gravity overcoming... Is equal to thrust per unit mass multiplied by the velocity of any vehicle runners of different weight values! And distance units, e.g a run or race competition typical battery is 65 lbs 58 seconds were enough win! ): just a guess, to start either positive or negative and likewise Power_gradient for riding or... Or power for all other factors we entered a standard criterium ) their relation at this point 's of! Torque ( N.m ) = 9.5488 x power ( kW ) / (..., tires, CdA, drivetrain efficiency and calculate the speed of a road with a gradient of %! Enough to win the Tour de France speed ) ^2 out this get. One unit to the Powerdrag formula mentioned above not everything on this page and in the resistance.

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