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Sep 14, 2003, 01:26 AM
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Direct drive small prop vs. geared big prop?

Which is better for what kind of usage? Big planes, small planes, going fast, going slow, light weights, heavy weights, efficiency, etc etc.....

Broke a gear on my SS. And it's going to take a while for replacement. So in the meantime I put on a speed 380 motor that has a direct drive folding prop on it that is pretty small 6"ish..
The plane still flies. But performance is kind of poor since I was using 6 cells. I put on another cell and it seems to blow a little harder but I have yet to try flying it. Now for something like this big wing, flying slow; I should be looking at a big prop that turns slow(relatively)? But can someone give me a rundown of whats for what, etc, etc?..

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Sep 14, 2003, 06:39 AM
UAV Driver
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Direct drive with a small prop is for a clean aircraft, designed to fly fast. Geared wiht a big prop is for a draggy plane that is designed to fly slow.

Size/weight of the plane pertains more to the selection of the motor itself, as opposed to whether to gear or not.


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