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.

[fhhhstix]

Originally Posted by ihbuilder

looks good OO just like a loco test stand/s

Thanks Steve.

Originally Posted by MACK Daddy

i like that



Alfy

Thanks Alfy

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

That is next on the list as well as some other ideas Izzy and I were kicking around.

Originally Posted by dabears

Thats really cool! I liked the one Oz made and was trying to figure it out, looks like you got it nailed and i like that its versatile for different truck lengths! Very cool!!! You gonna be selling them??? It's a better option to my method of using a small 1/4 pint paint can to prop up the rear bumper

Thanks and I am not sure about selling them as I don't think it would be realistic with the cost of the parts. The delrin rod is $8 a foot (sold in 5ft pieces) by its self then the $15 for aluminum, $8 for the steel rod + misc is about $70 in parts alone. Then you add about 4 hrs labor your going to be close to $150.

Originally Posted by Claus

Very nice, wouldn't mind having one of those myself.

Thanks.

Originally Posted by Cossett

Looks like the new improved version of Oztrucks roller..so when will you be selling them?..

Thanks.



Thanks to everybody for looking.

Travis