RC Twin Electric Motors Spin Opposite?

by Jeff Parliament
(Kunkletown,pa usa)

When operating an plane with 2 motors is it permissible and or recommended to run one motor in one direction and the other in the opposite direction using a regular prop and a pusher prop?

I am building a p-82.

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Depends
by: rcdude07

If you want scale, then have them spin the same way. Only two full scale planes I know of used counter rotating props, the P-38 and I forget the other one right now.

If you want to decrease engine torque to one side, have them spin opposite.

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Counter Rotating Props
by: Anonymous

The other aircraft was the OV-10 BRONCO

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Proper rotation for best result
by: Anonymous

UnraY

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multiengine prop rotation
by: Anonymous

Motor torque tends to turn the aircraft in opposite direction of prop rotation, hence the airplane tends to turn left on take off, especially when a high rate of climb is used. In a multi-engine aircraft, the plane will try to turn toward the dead engine due to asymmetrical thrust. Therefore, to offset the thrust with torque, the left (port) engine(s) should use a standard pitch prop turning CCW viewed from the front, and the right (starboard) engine(s) should use reverse pitch props turning CW. When flying a real twin engine aircraft and lose the port engine, it takes a LOT of right rudder and usually a reduction of airspeed to maintain heading.

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Easy to Answer
by: Anonymous

Motors MUST turn in opposite directions.

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Counter rotating props on a twin NEW
by: Anonymous

Virtually every really high powered full size twin uses counter rotating props.
Most RC planes use motors that are proportionally higher powered than full size AND an electric motor produces full torque instantly. Full size engines need to speed up to produce full torque.
Counter rotating in electric twins is a good idea!

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