Thread: Build Log 100% scale, Electric Lazair
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Old Aug 07, 2012, 04:42 AM
Neil Stainton is offline
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United Kingdom, England, Stratford-upon-Avon
Joined Feb 2001
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Quote:
Originally Posted by Mike Freas View Post
I'm going to assume the prop size was selected to provide the best performance while keeping the Amp draw in check.
Not really. A slightly heavier lower Kv motor turning a bigger prop will have a higher propulsive efficiency than a similarly efficient higher Kv motor turning a smaller prop. As the electric motor weight is a small proportion of the total aircraft weight there will generally be a duration/range increase, at the expense of a cost and weight (and structural load) increase.

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