prop performance for 40
Hi!
First use APC props ...those Master A is no good!!!
The OS .40 LA is no power house so if you fly at sea-level and are using an ordinary high-winged trainer aircraft a 11x6 will be best!
If on the otherhand you have it in a low-winged Q-500 racer type aircraft...then use a 10x6 APC prop.
Regards!
Jan K
Sweden