Help choosing the motor - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-31-2012, 07:35 AM   #11
I am: Philip A
Join Date: May 2009
Location: Cambridge, Ontario

Feedback: 21 / 100%
Posts: 1,325
Total Props: 15
Re: Help choosing the motor

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Originally Posted by Florin View Post
The way Philip explained it makes sense, starting from the "scale flight ~60w/lb" rule of thumb.

Thanks again guys, I'll get back to you with pics and movies from the maiden flight
Resist the urge to overpower the plane. For slow scale flight, use the lightest motor/battery you can (to reduce wing loading) and use a large diameter prop (which is more efficient at producing thrust and has a lower pitch speed).

I recently built up a Dumas Tiger Moth kit. It's a beautiful plane. The first motor was a Motrolfly DM2203-1600 outrunner spinning an 8" prop. Way too much speed and the plane didn't respond well. I swapped in a 1350 kv version of the same motor spinning a larger 9" prop at a much slower speed and it transformed the plane.
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