Inertia dynamometer:

Dynomec's inertia dynamometer contains a drum with known weight and size.With the help of RPM range this drum can be easily accelerated.The speed of acceleration and mass of the drum helps a computer to calculate the horsepower.One thing to make sure is that there will be nothing to measure unless the engine is accelerating.Nothing to measure means no constant RPM will be running while adjustments are made. Our Inertia dynamometer is much simpler and need essentially no calibration as a known quantity,the drum, is simply accelerated by the vehicle. When you know how fast the drum was accelerated, you know how much torque was required and you calculate horsepower. Remember, horsepower is calculated, not measured. You measure torque.

The inertia dyno consists of front frame, rear frame, front wheel carriage.Rear frame includes large high inertia flywheel. Flywheel could be manufactured of steel drum, pipe or bar.Front farme includes stand and front wheel carriage to adjust different bike lengths.

The test procedure is simple:

• Start the engine
• Warm to operating temperature
• Accelerate from near idle through the power band to max rpm
• Close the throttle, and apply the brake to slow the flywheel

During the acceleration of the engine, a computerized data acquisition system is monitoring the speed of the dyno flywheel. After shutting off the engine the data collected by the computer is analysed and processed to produce the appropriate information. The computer "knows" the weight of the flywheel and calculates horsepower and torque values based on the amount of time it took to accelerate the flywheel from start to finish and moment to moment.