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Old Oct 26, 2011, 03:40 PM
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United Kingdom, England, Basingstoke
Joined Oct 2005
481 Posts
That not Strictly true, Sorry!

With out getting into reams of theory, there come a point ware swirl increases the effective AOA of the back blades. at which point the front blade start wind-milling. Contra props are not simple.
Have also been there done that.
See post http://www.rcgroups.com/forums/showt...246407&page=77 item 1143

Peak O/P of 1.6KW. 755 Watts off the front blade & 852 off the back, flying with same pitch. Ended up with more on the front.
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