Quote:
Originally Posted by Sammus
That's why I keep asking about torque :) That's why I keep talking about gearing down to the same shaft speed. Power and torque are directly related via rpm.
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At 5250 rpm in a gas engine they are the same (if memory serves me correctly).
As far as taking 1 of each design that produce similar output (watts) numbers and setting them up in matching vehicles that are setup to go the same top speed... You will find the outrunner has more torque off the line due to its design. It should also startup smoother due to the multi pole design. The inrunner may spool up faster, and will feel more responsive once it is spinning. That responsiveness is more desireable in a land vehicle due to its reasonably large speed window. Plus the sealed can and lack of spinning parts also makes it better for the application.
Also, the fact that the outrunner can produce the same horsepower while spinning slower should indicate its performance ability...
Look at a big block gas engine versus a turbo 4-banger. Both can push out 600+ hp, but the big block will do so turning slower and will produce more torque. If you want to do 200mph the slow revving big block may not be the best choice due to weight and gearing options, but neither would putting the turbo motor in a tow truck... And just because the big block can make 700ft/lbs of torque does not mean the turbo motor can...