Hello Graham! Interesting discussion on the Whirlwind. The CAF report was
done with the original design blades but Jim wasn't completely satisfied
with that so he redesigned the airfoil and twist to get better performance.
The "numbers" changed quite a bit increasing climb rate by over 100 fpm and
shortening take off roll by 100 feet. This is the current design supplied by
Whirlwind as far as I know.... And yes, it was the single best performance
enhancement I ever made to N111EU. It is more complex than just bolting on
the Airmaster but I like that the weight (and rotating mass) is so minimal.
My installed weight including governer, cable control, spinner and backing
plates and of course, the propeller assembly came in at 13.5 lbs. Anyway,
have a great summer! I will be in Sweden, Gotland June 5 til June 21 at my
friend's airport ESVB (Bunge) and we would love to see some Europas fly
there. You can get information about the airport on line.
Kim prout
|