Friction limited drive train calculator

[Amo10]

I remember seeing a calculator somewhere that would tell you if your drive train was friction limited or was going to stall that used the coefficient of fruition and such. I was wondering if someone could post a link to this.

[Nate Laverdure]

The calculator exists, but surely you can work this out for yourself.

The idea that a FRC drivetrain is "traction limited" simply means that, at the contact point between the wheel and the carpet, the force applied by the wheel is able to exceed the maximum reaction force capable of being applied by the carpet:

tau_drivetrain at stall condition * r_drive wheel > mu_wheel tread on carpet * N_drive wheel


...I'll also suggest, without providing proof for this, that for "good" FRC drivetrains:

tau_drivetrain at stall condition * r_drive wheel >> mu_wheel tread on carpet * N_drive wheel

[Mike Marandola]

Here is the west coast products calculator:
http://www.wcproducts.net/how-to-drivetrain/
And JVNs spreadsheet:
http://www.chiefdelphi.com/media/papers/2755

The wcp calculator gives you a yes or no answer but JVN's calc does not.