This Sunday, + 6 Celcius. With orijinal Tower Muffler, %10 Nitro and 9x8 prop (cut down from 10x8)
My .53 Irvine was turning 14.200 rpm.

Trottle response was better than TOS (Tower + OS .91) muffler.

F 20 was also a little bit faster (not much). Take offs are delicate thou.

Will try 9x9 prop, if I can find one. (Actually everyone says Tigersharks (phoenix) are not for speed. They are just sport fliers. So I should expect no more speed.)( I didn't hear any flutter sound... yet)

Regards.

Zafer Türkeli