Drive train test stand.(upgraded to AWD version)

[CG Bob]

Originally Posted by rockNmayhem

For some reason I'm picturing trying to turn this in to a mobile dyno for the trucks. I just wish I could now figure out something to test the power with and I'd be building it.

Tyler

There was a discussion about finding the "Kv constant" for an unknown motor on another board. Basically chucking the motor in a drill press set at a specific rpm, and measuring the voltage generated by the unknown motor.

The same basic set up could be used as a mini dyno. Connect a separate motor to one of the test stand rollers. The motor can be connected directly to the roller shaft, or with gears, or belt driven; the two gears or pulleys must be the same size. Attach a Watt meter to the leads of the motor. 746 Watts = 1 hp.

To see how close your model hp scales to full size hp, multiply the model Watts from the dyno by the cube of the scale. Let's say your 1:16th scale truck generates 91 Watts on the dyno. 16 cubed is 4096. 91 x 4096 = 500 hp.