RE: Anyone got OS 75AX numbers yet? Apples with Apples results?
I've been told by bob27s (who works for Jett) that the Turbo-jett muffler is more for torque than all-out rpms.
He told me that i should be able to run a larger prop. At the moment i have an APC 14x6 fitted and it's all ready to go for the maiden flight of my Super Skybolt this weekend.
I got 10,400rpm with that 14x6 prop using a dodgey tach in fading light. I don't know how accurate that result is. I've now bought myself a Fromeco TNC tach as an early xmas present and will try to test a few different props during the weekend.