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Propeller Question

Old 01-18-2020, 08:07 AM
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dasintex
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If I wanted to have counter rotating props on a electric powered twin engine plane, both Props rotating into the fuselage when looking from the front, reversing the wires on one of the motors, do I use a Normal Rotating Prop on one side and a Pusher Prop on the other side? And correct me if I am wrong, Normal Rotating Props on Electric Powered Planes is Counter clockwise and Reverse would be Clockwise and I would use the pusher prop?
Old 01-18-2020, 08:49 AM
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speedracerntrixie
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Rather then a pusher prop, you would want a matching set of clockwise and counterclockwise props. A pusher is still designed to rotate counterclockwise. I suggest looking through the APC website to find a set of props that will suit your motors size and KV rating.
Old 01-18-2020, 04:29 PM
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DGrant
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Exactly what speedracer said. The clockwise will probably be designated CW, and the counter-clockwise will be CCW... or something very similar to that.
Old 01-19-2020, 05:35 AM
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dasintex
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Let me give an example; Master Airscrew Lists 3 Bladed Props: 10X5 & 10X7 in normal CCW Rotation and they also offer 10X5 & 10X7 in what they call 'REV/PUSHER' https://www.masterairscrew.com/collections/3-blade/10 ;can I assume that if I got both types in either size to use in a forward facing twin engine counter rotating configuration it would work?
Old 01-19-2020, 06:24 AM
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A. J. Clark
 
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If you use a pusher prop to push or pull it's still running in the same direction . The direction it was designed for.
Old 01-19-2020, 07:21 AM
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Steve Collins
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I have several electric twin motor planes. I have it both ways from one plane to the next but I honestly cannot see any difference between the counter-rotating ones and those that both turn the same direction. The point is, unless you just have to have them counter-rotate, it really isn't necessary.

Same direction: Hangar 9 B-25; Hangar 9 Twin Otter, Phoenix Models A-26

Counter rotating: Flightline P-38 (2 of them), FMS Grumman Tigercat

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