# power to weight speed calculator

Alas, very few current cars can match the 911's record of weight control. Use the calculators below to convert the numbers. 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. 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. So far, we assumed perfect cycling conditions without a single breeze. (no weather correction). The speed of a cyclist depends on a number of factors. 0-60 mph Calculator for Cars This calculator has been designed around statistical averages based largely on sample data from Edmunds.com. Weight is as the car sits on the line; driver and gas in it. Velocity/Speed Calculator. While ascending or descending the gravitational forces do not act perpendicular to the road anymore. Therefore, the rolling resistance changes to. Enter the total weight of both the vehicle and the driver; 4. 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. This is a beta version. For all other factors we entered a standard value. 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.. For example, if you have speed in mph (miles per hour), time should also be in hours. Now let us get back to the gravitational force. Forcedrag wind = 0.5 * CdA * Air density * (Speed + Headwind Speed)^2. For runners of different weight the values will also be different. Who would have thought it, but the rolling resistance mainly depends on the tires (pressure, compound and profile) and the systems weight (rider+bike). Passenger Weight (in pounds): Let us call the angle of inclination Î± in the following. 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. Input the power of the vehicle's engine; 5. Examples of high power-to-weight ratios can often be found in turbines. 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. On a road with a gradient of 10% you gain 10m in altitude while covering a horizontal distance of 100m. Powergradient = 9.8067 * Weight * sin(Î±) * Speed. Therefore, the gravitational forces only appear in the rolling resistance part of the overall speed calculation. It is equal to thrust per unit mass multiplied by the velocity of any vehicle. Since aerodynamic optimizations, for example changes in a riderâ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. Vehicle Weight (in pounds) Vehicle Horsepower: RPM through lights (finish line) Tire Diameter (Hght.) 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). Vehicle horsepower To Weight Ratio = 0.0156. The cycling performance must at least include a distance and a time (and the weight of the biker). In most riding scenarios the aerodynamic drag accounts for the largest part of these forces. 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. Note: This is a rough and quick estimate of engine horsepower. 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. At the same time this dramatic final stage proved the advantage of an aerodynamic position and equipment to a large audience. 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. Enter the vehicle power and vehicle weight in the vehicle horsepower to weight ratio calculator to find the ratio for the same. 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). 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. In the introduction to this 'calculator-insights' I wrote that the rider has to overcome certain forces. If you have distance in kilometers, then speed should also be in km/h (kilometers per hour). You can adjust these values to see the impact. Power to weight ratio is used to measure the actual performance of any engine or power source as a whole. Grade is the percent of incline for the calculation. The power to weight is a better measurement than just purely quoting the bhp or kW of a vehicle. As mentioned in the section about the rolling resistance the calculator above assumes a perfectly level track. This is … Not everything on this page and in the statistics or results might be perfect. Mass/Weight; Power; Prefix; Pressure; Speed/Velocity; Temperature; Time; Torque; Volume; Unit Converters  ... Velocity/Speed Calculator. Powerrolling = 9.8067 * Weight * cos(Î±) * CRR * Speed, while we can calculate the power related to the forces âpushingâ or âpullingâ us on a hill with. The unit of the result will depend o… This site uses cookies. Try out this calculator get a rough estimate of horsepower. This online vehicle horsepower to weight ratio calculator will in comparison of units or designs from one unit to the other. BHP Per Ton List For 60 foot, 330 foot and 660 foot split as well use our quarter mile calculator with incremental. Welcome to the oldest and most popular bicycle performance prediction calculator on the web - since 1997. 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. Once you have done this you could compare the power to weight with AutoSnout.com's bhp per ton or kw per ton lists. Secondary Propulsion Weight (in pounds): This could be a kicker motor or an electric trolling motor: Number of Batteries: Avg. This part of the calculator allows you to calculate the FTP of elite cyclists (or yourself), using a cycling performance. The gradient of a road is usually stated in percent and indicates the rise over run ratio. Powerdrag wind = 0.5 * CdA * Air density * (Speed+ Headwind Speed)^2 * Speed. 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. Simple Power to Speed Calculator. 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. Choose temperature, altitude, tires, CdA, drivetrain efficiency and calculate the speed for a given power output. In recent years the importance of aerodynamics was recognized by most professional and many amateur cyclists. The answers below will be for at sea level and standard pressure/temperature. 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. 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. = ( 234 / 15000 ) In order to move at a certain speed, a cyclist has to overcome a number of forces. 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 … Make up some numbers, doesn't matter, won't hurt a thing. The CRR coefficient is commonly used to characterise a tires rolling resistance. 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. (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. Bicycle Power and Speed Calculator (A more detailed watts to speed calculator. miles, kilometers, meters, yards, feet, and hours, minutes or seconds. The Power to Weight Ratio (PWR) is the standard that most cyclists use to measure their fitness and improvement. 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 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. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. Effortlessly compute speed or power for all important parameters, such as weight, grade, position and tire type. On the home page. 3000/54 = 55.56, this creates you a 'Speed to RPM conversion ratio'. Most powermeters measure the power at the front chainrings or the pedals. It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. The power of an engine is called as horsepower. The horsepower to weight ratio is used to find the performance of the vehicle. To define the latter the drag area CdA is commonly used. In most riding scenarios the aerodynamic drag accounts for the largest part of these forces. 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). Power-Torque Torque (lb.in) = 63,025 x Power (HP) / Speed (RPM) Power (HP) = Torque (lb.in) x Speed (RPM) / 63,025. 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. Divide the RPM value by the Speed value i.e. Rider and Cargo Weight is the total weight of the the rider(s) and cargo. 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 It is followed by the gravitational forces, the rolling resistance of the tires and mechanical losses of the drivetrain. That's the kind of power-to-weight ratio improvement that truly satisfies, isn't it? 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. A 14% driveline loss is assumed for Wheel HP. Simply said power is defined as work over time, while work is defined as force times distance. The speed of a cyclist depends on a number of factors. Weight is as the car sits on the line: driver and gas in it. Note that angle of inclination Î± usually has a value between -20Â° and +20 (for descending or respectively ascending the steepest road in the world with a gradient of around 35%). Power is the Watts rating of the motor. Bike Calculator. = ( Power / Weight ) 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. In order to move at a certain speed, a cyclist has to overcome a number of forces. 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%. There is a new version of this calculator! Most cyclists use their FTP for their power input to calculate their PWR for an hour (or a standard criterium). This results in. These 58 seconds were enough to win the Tour with a time advantage of only 8 seconds. 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. Vehicle Weight is the weight of the vehicle with no rider or cargo on it. CdA stands for the product of the frontal area of rider and bike, named A, and the drag coefficient cd (often also cw). 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 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. 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. Click on the "Calculate" button to generate the calculation. This calculator assumes a flat course, a bike equipped with commonly used road bike tires and ideal cycling conditions (no wind, 20°C). Road bike drivetrains (with derailleur gears) can have efficiencies up to 98%. So the intuitive approach leaves us to a wrong result in this case. First of all, we have to take a look at the term gradient. This calculator computes the estimated engine or motor horsepower from trap speed. Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM) Now we talked a lot about aerodynamics, gravity and overcoming the forces of nature and did not mention the wind once. 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. Adjust using real data after you get close. BHP per Tonne Calculator. This is our very own power to weight, watts to speed, and estimated time to terminal velocity bare bones calculator.) `` calculate '' button to generate the calculation of power-to-weight ratio improvement that truly satisfies is! Loss is assumed for Wheel HP miles per hour ) account, what a surprise we. 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