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Thread: Contra Rotating Propeller Drive for f3a 2m Pattern Planes
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Old 10-15-2016 | 10:09 AM
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Henning
 
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Originally Posted by Henning

The next to try is mould some air inlets that directs the air to the front of the motor where it is at its hottest. I will also cut a new front mounting plate in aluminium to replace the current one I cut in fibre glass. The aluminium plate will act as a heat sink for the motor.

Br,
Henning
With proper ducting of cooling air to the motor the temperature went down from “too hot to touch after a flight” to below body temperature.

I created two plugs of foam and covered them with Oracover. The plugs where then coated with wax before adding fibre glass and carbon fibre. The foam and the Oracover where pealed out after curing. Without any trimming and sanding the air ducts came out at 3-4 grams each.


Br,
Henning

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