your Shaft RPM will change as your motors rpm changes, the transmission will alter the RPM as you change gears. in top gear it should be 1:1 if memory serves me correctly.
If you had or bought a pto( power take off ) on your transmission you could add power through it, to run the drive shaft off a belt would require cogs, imo, the belt would slip without them. "Maybe" once up to speed the belt could take over, i have concerns of the belt torque on the u joints as well.
Perhaps drive the air compressor off the drive shaft and power the vehicle off the PTO.
In short without a PTO it sounds problematic.
Have you seen/read about any working examples of your idea?
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Last edited by ecomodded; 06-23-2012 at 02:10 PM..
Reason: add info
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