Dynamometer, affordable

[Steven Buchholz]

Eric Elliott wrote: [excerpted]
> A prop on a rear axle could be cheap and avoid the 3100 RPM limit via 
> hypoid gear ratio. The differential could be locked for <$5, via 
> addition of 2 spider gears. A thrust bearing might not be needed as 
> ring gear axial thrust might exceed prop thrust.
> Some calculation of (effect of) thrust to be generated would be in 
> order. Also consider tendency of prop to "process" people.

Just a quick $0.02 ... if you chose the rear differential from an Audi
Quattro you would find that the diff locking mechanism was built in.
I don't know how many different reduction ratios are available in these
diffs.  

Steve Buchholz
s_buchho at kla.com