5/31/2023 0 Comments Dyno dynamics calculator![]() To = Intake air temperature in degrees F, Bdo = Dry ambient absolute barometric pressure. This formula assumes a mechanical efficiency of 85%. The public correction factor is the SAE correction factor. Once they have these numbers a series of correction factors are applied, some made public, some hidden as proprietary secrets. ![]() Torque is then calculated using the horsepower number: Torque = Horsepower * 5252 / RPM. Since the mass of the drums is know and acceleration has been measured, Power (horsepower) can now be calculated. The force applied to the drums is calculated from acceleration using Newton's 2nd law, Force = Mass * Acceleration. Acceleration is simply the difference in velocity at the surface of the drums from one revolution to the next. It measures force at the surface of the drum by indirectly measuring it's acceleration. It measures velocity directly by measuring the time it takes to rotate two heavy steel drums one turn. Dynojet's inertial dynamometer measures power according to the terms just described. So to measure horsepower, we need to know force (in pounds) and velocity (in feet per second). In real terms, it would take 1 HP to raise a 550 pound weight up 1 foot in 1 second. By definition, one horsepower is equal to applying a 550 pound force through a distance of 1 foot in one second. Power in mechanical terms is the ability to accomplish a specified amount of work in a given amount of time. Since the DynoJet seems to be widely used and numbers quoted are those from a DynoJet, we are going to use them as our inertia dynamometer example.įirst it is important to have an understanding of how DynoJet gets their horsepower numbers. This is where we need to understand how the rear wheel horsepower number was derived. The most often heard discussion is that what factor can be applied to rear wheel horsepower to reflect crankshaft horsepower. A loading dynamometer applies resistance that is measured (using some type of strain gauge.) An inertia dynamometer (such as DynoJet) does not measure torque, but measures acceleration. There are two types of chassis dynamometers on the market, inertia and loading. selected.This discussion revolves around chassis dynamometer's and is intended to be informative and thought provoking. Command RPMĪllows you to hold the selected RPM to within +/- 10 RPM of the selected RPM. and ensures that the dynamometer always loads, unloads and moves to the new selected speed safely. It constantly monitors command voltages, response rates etc. Protects from accidental sudden changes in desired speed or load of the dynamometer. No need for you to manually save all the different data! Soft Command Override The software is designed to automatically save the vehicle data into class, make, model, year, engine size etc. ![]() The team have created an extremely user friendly program, that you will master in less in an hour or two! Automatically saves vehicle data User FriendlyĮven though out software is state of the art, you won’t need a computer sciences degree to learn how to use it. State of the art Microcontroller (MCU) based system components enable the dynamometer to operate completely independently of a computer. You will be able to see everything that is going on within the vehicle or engine reflected in the graph. Our dynos are ‘rock solid’ under load! Real Time High resolution fine line graphing With steady state, you can hold the vehicle or engine at an exact RPM without the dyno wandering. Our software is designed and manufactured by our highly skilled Research and Development in our Manufacturing Facility in Melbourne, Victoria. 100 % Australian designed, Engineered in house What makes a Dyno Dynamics dyno the premium dynamometer choice? The answer is our state of the art software.
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