I was at the RAeS light aircraft design conference in September where Mark Wilsch of Wilsch aeromotive gave a superb presentation that would answer all of your questions and then some.
The bad news is he didn't present a written paper (the other papers are at
http://www.raes.org.uk/light-av/index.htm but I got the impression that if you were to contact him he'd probably be glad to help you out.
G