I don't know. I agree that a higher gear ratio will give you more torque out and that is why the contra can throw larger props, but at a lower rpm. And yes that makes it feel more like the car in second gear. Maybe it is impossible to have a direct drive system and a geared system that have identical torque-speed curves and that is why we perceive the geared system has more torque. Where is Chad? How does the Plettenbuerg torque-speed curve compare to a geared Neu?
Jim O
Hi Jim
I don't know how it compares to the Neu, since I haven't used one. However, the Pletty contra, compared to the Advance....is hard to compare. The RPM range of the single prop is wider, so the model accelerates quite different when compared to the contra. I electronically slow down the throttle in the radio anyway because all the motors spool too fast, so from my perspective as the pilot I can't see any spool time difference. I think when either gear drive or outrunner or direct drive inrunner are operating at cruise RPM, the time to spool to full throttle is virtually instantaneous anyway, probably much faster than anyone would actually move the throttle stick since we try to fly smooth
I am a bit lucky in that I have one Acuracy with the Advance, and one with the contra, so I can compare easily. The Advance clearly has more high speed potential, but the contra has better braking (even than the 3b), and more thrust. I think the closest you can get with a 2 blade is a 22x12 single prop, but you would be slower with that prop than the higher pitch contra.
Chad