On May 13, 2015, at 10:37 AM, Cor van de Water via EV <[email protected]> wrote:
> I thought that torque was calculated/measured at the wheels It can be measured anywhere, but is typically specified at the output shaft of the motor (whether electric or ICE) unless otherwise noted, for the simple reason that gearing changes torque. Horsepower can also be measured anywhere, and is generally assumed to be at the motor unless it's specified to be at the wheels. Both figures, of course, depend on engine RPM, and peak value is generally specified even though average torque tells you a lot more about what the engine can do than its peak. If it's at the motor, the torque gets multiplied by whatever the final gear ratio is. The ICE half of my Mustang is going to have a 3.89:1 differential, and the engine will put out a relatively constant 400+ ft-lbs between 3000 and 6000 RPM...which works out to about 1600 ft-pounds at the wheels in fourth gear, and nearly 5000 ft-pounds in first -- again, a problem in a ~3000 pound nose-heavy car, but a good problem to have. When I put a dual AC-35 with ~2.5:1 reduction to a front wheel drive axle into the car in the next phase of the project, all-electric mode should be superior to what the original 260 cu. in. V8 was capable of...and hybrid mode is going to be insane, to use Tesla's word. b& _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
