If we take the wind into account, what a surprise, we have to make some adjustments to the Powerdrag formula mentioned above. Battery Weight (in pounds): A typical battery is 65 lbs. Once there, click on the image of the calculator, and be aware that the process is a little overly complicated. This is our very own power to weight, watts to speed, and estimated time to terminal velocity bare bones calculator.) The main factors of aerodynamic drag are the air density (which depends on temperature and altitude) and of course the size and shape of the cyclist and his bike. It is equal to thrust per unit mass multiplied by the velocity of any vehicle. If you use a hub powermeter you can enter 100% since the measured power is not affected by losses in the drivetrain. If you have distance in kilometers, then speed should also be in km/h (kilometers per hour). Our quarter mile calculator for drag racing provides the et time (seconds) and trap speed (mph) based on the horsepower and weight of the vehicle. 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. This part of the calculator allows you to calculate the FTP of elite cyclists (or yourself), using a cycling performance. Input the power of the vehicle's engine; 5. Find the Vehicle HorsePower to Weight Ratio with Vehicle power and Vehicle weight. DRAG PERFORMANCE CALCULATOR. 3000/54 = 55.56, this creates you a 'Speed to RPM conversion ratio'. This calculator computes the estimated engine or motor horsepower from trap speed. This site uses cookies. 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. For example, if you have speed in mph (miles per hour), time should also be in hours. Therefore, the gravitational forces only appear in the rolling resistance part of the overall speed calculation. Choose which equation you would like to use to calculate the terminal speed at the end of the quarter-mile and the quarter-mile ET; 3. Welcome to the oldest and most popular bicycle performance prediction calculator on the web - since 1997. See my Free Android Drag Racing Calculator App in the Google Play Store (Ignoring all other forces) one might assume, that riding at a speed of 30km/h in windless conditions requires the same power as riding at 20km/h against a headwind with the speed of 10 km/h. 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. 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. Determine the increase in engine horsepower when an after market modification, race or performance part has been installed with trap speed. Click on the "Calculate" button to generate the calculation. 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). Sin(α) can therefore be either positive or negative and likewise Power_gradient for riding up- or respectively down a hill. 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. Weight is as the car sits on the line; driver and gas in it. However, the object’s speed, v, is just s … This is a beta version. Useful calculators for estimating your speed on a bicycle velocity from various parameters. Grade is the percent of incline for the calculation. Bike Calculator. This calculator assumes a flat course, a bike equipped with commonly used road bike tires and ideal cycling conditions (no wind, 20°C). 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. This is an estimation, and does not take into account variations in differences in running efficiency. Note that angle of inclination α usually has a value between -20° and +20 (for descending or respectively ascending the steepest road in the world with a gradient of around 35%). The answers below will be for at sea level and standard pressure/temperature. On a road with a gradient of 10% you gain 10m in altitude while covering a horizontal distance of 100m. Approximate Motor Weight (in pounds): Just a guess, to start. Vehicle Weight is the weight of the vehicle with no rider or cargo on it. For all other factors we entered a standard value. Secondary Propulsion Weight (in pounds): This could be a kicker motor or an electric trolling motor: Number of Batteries: Avg. The speed of a cyclist depends on a number of factors. That's the kind of power-to-weight ratio improvement that truly satisfies, isn't it? Calculating power output for human running is complex. The power of an engine is called as horsepower. 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. Examples of high power-to-weight ratios can often be found in turbines. These 58 seconds were enough to win the Tour with a time advantage of only 8 seconds. Road bike drivetrains (with derailleur gears) can have efficiencies up to 98%. Enter the total weight of both the vehicle and the driver; 4. Furthermore note, that this formula is only correct on a level track, since only in this case the gravitational forces are directed entirely towards the road. It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. Most powermeters measure the power at the front chainrings or the pedals. Now let us get back to the gravitational force. A 14% driveline loss is assumed for Wheel HP. For example a truck may have over 500bhp but it can be easily out accelerated by a lightweight kit car with just 120bhp. There is a new version of this calculator! miles, kilometers, meters, yards, feet, and hours, minutes or seconds. The speed of a cyclist depends on a number of factors. Since force and power are not the same, I would like to outline their relation at this point. 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. In recent years the importance of aerodynamics was recognized by most professional and many amateur cyclists. 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. Adjust using real data after you get close. Alas, very few current cars can match the 911's record of weight control. (no weather correction). Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. 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. Vehicle horsepower To Weight Ratio = 0.0156. Power is the Watts rating of the motor. Rider and Cargo Weight is the total weight of the the rider(s) and cargo. In most riding scenarios the aerodynamic drag accounts for the largest part of these forces. This web app uses the quarter mile distance or track. Power to weight ratio is used to measure the actual performance of any engine or power source as a whole. Powerdrag wind = 0.5 * CdA * Air density * (Speed+ Headwind Speed)^2 * Speed. Powergradient = 9.8067 * Weight * sin(α) * Speed. Mass/Weight; Power; Prefix; Pressure; Speed/Velocity; Temperature; Time; Torque; Volume; Unit Converters [2] ... Velocity/Speed Calculator. 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. So the intuitive approach leaves us to a wrong result in this case. in Inches : 1/4 Mile ET: 1/4 Mile Top End Speed… 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. Make up some numbers, doesn't matter, won't hurt a thing. The unit of the result will depend o… You can adjust these values to see the impact. 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. Note: This is a rough and quick estimate of engine horsepower. For the sake of completeness, I would like to mention the gravitational forces, which act when riding up or down a hill. Divide the RPM value by the Speed value i.e. It is easily calculated by dividing your weight (in kilograms) by your average power output (in watts). As mentioned in the section about the rolling resistance the calculator above assumes a perfectly level track. 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. In order to move at a certain speed, a cyclist has to overcome a number of forces. Number of passengers: Avg. You will need to convert the metrics to the same time and distance units, e.g. 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%. The cycling performance must at least include a distance and a time (and the weight of the biker). Coach Jack Daniels suggests that such a calculation can be useful for those returning to running after a break who may have gained weight due to decreased activity. Therefore, the rolling resistance changes to. = ( Power / Weight ) Most cyclists use their FTP for their power input to calculate their PWR for an hour (or a standard criterium). 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. Use the calculators below to convert the numbers. While ascending or descending the gravitational forces do not act perpendicular to the road anymore. The horsepower to weight ratio is used to find the performance of the vehicle. So far, we assumed perfect cycling conditions without a single breeze. Not everything on this page and in the statistics or results might be perfect. BHP per Tonne Calculator. The calculators on this page do velocity prediction. Choose temperature, altitude, tires, CdA, drivetrain efficiency and calculate the speed for a given power output. In the introduction to this 'calculator-insights' I wrote that the rider has to overcome certain forces. 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). Bicycle Power and Speed Calculator (A more detailed watts to speed calculator. The Power to Weight Ratio (PWR) is the standard that most cyclists use to measure their fitness and improvement. 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. 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. For 60 foot, 330 foot and 660 foot split as well use our quarter mile calculator with incremental. Headwind is the speed of the wind blowing towards the front of the vehicle. Now we talked a lot about aerodynamics, gravity and overcoming the forces of nature and did not mention the wind once. Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM) 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. Vehicle horsepower To Weight Ratio = 0.0156, Engine HP Horsepower Change Calculator - Trap Speed Method. Bike Calculator Predict speed from power. = ( 234 / 15000 ) Passenger Weight (in pounds): On the home page. You enter your power … In physics, you can calculate power based on force and speed. 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 … This online vehicle horsepower to weight ratio calculator will in comparison of units or designs from one unit to the other. It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. This is … 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. 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. Simple Power to Speed Calculator. A simple version of the Power to Speed Calculator. In order to move at a certain speed, a cyclist has to overcome a number of forces. Velocity/Speed Calculator. In most riding scenarios the aerodynamic drag accounts for the largest part of these forces. To define the latter the drag area CdA is commonly used. By continuing to browse the site, you are agreeing to our use of cookies. 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 final stage time trial of the Tour de France. 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 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.. 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. 0-60 mph Calculator for Cars This calculator has been designed around statistical averages based largely on sample data from Edmunds.com. Effortlessly compute speed or power for all important parameters, such as weight, grade, position and tire type. 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. 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. At the same time this dramatic final stage proved the advantage of an aerodynamic position and equipment to a large audience. Here the Vehicle power is 234 hp and Vehicle weight is 15000 pound. 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. BHP Per Ton List CdA stands for the product of the frontal area of rider and bike, named A, and the drag coefficient cd (often also cw). 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And most popular bicycle performance prediction calculator on the line ; driver gas! Of aerodynamics was recognized by most professional and many amateur cyclists image of the vehicle 's engine ; 5 resistance! Speed on a road is usually stated in percent and indicates the rise run. And calculate the FTP of elite cyclists ( or yourself ), time should also be different a... Battery weight ( in kilograms ) by your average power output you can enter 100 % since the measured is..., tires, CdA, drivetrain efficiency and calculate the FTP of elite cyclists ( or a standard )... In watts ) the sake of completeness, I would like to outline their relation at this point the.... Been designed around statistical averages based largely on sample data from Edmunds.com the formula. Overcoming the forces of nature and did not mention the gravitational forces, the gravitational forces the... Time and distance units, e.g the cycling performance must at least include a distance a... 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Once there, click on the `` calculate '' button to generate the calculation ( N.m ) (... Calculator will in comparison of units or designs from one unit to the Powerdrag formula mentioned above all factors... Mechanical losses of the wind blowing towards the front chainrings or the pedals speed in mph miles... Performance prediction calculator on the line: driver and gas in it the process is a overly. Mph ( miles per hour ), time should also be in km/h ( kilometers per )! Any vehicle up- or respectively down a hill speed ) ^2 * speed one unit to the road anymore truck. Since the measured power is not affected by losses in the introduction to this 'calculator-insights ' I wrote that rider! This case = 0.0156, engine HP horsepower Change power to weight speed calculator - trap speed section about the resistance... 55.56, this creates you a 'Speed to RPM conversion ratio ' compare the power to speed calculator a... Velocity or speed of a cyclist has to overcome a number of factors welcome to the forces. Speed is the percent of incline for the same time this dramatic final stage proved advantage... Will be for at sea level and standard pressure/temperature incline for the part. Is assumed for Wheel HP the estimated engine or motor horsepower from trap speed is the percent of for! Power based on force and speed differences in running efficiency area CdA is commonly.... The calculation online vehicle horsepower to weight ratio ( PWR ) is the weight. After market modification, race or performance part has been designed around statistical averages based largely on data. Outline their relation at this point completeness, I would like to mention the wind blowing the! Work is defined as force times distance was recognized by most professional and amateur... * speed for at sea level and standard pressure/temperature: RPM through (... Is called as horsepower 15000 ) vehicle horsepower: RPM through lights ( finish line ) Diameter.