I can get a better match with his data if I assume the Cozy
has more drag....

Paul, looks as if your calculations are close, Phill is another Cozy/Subi builder:
http://www.geocities.com/plmjohnson/characterising4.htm
Phill is a good detail oriented engineer
...Chrissi

My curve is a little off at the low speeds because induced drag is 
starting to affect the results more.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org