ORIGINAL: britbrat
Actually, you will find that the APC 10-6 will greatly benefit your Superstar/.40LA combo & it wont be from anything to do with weight. Your engine just can't spin that 11-7 prop at anywhere near its (engine) optimal rpm. You may think that it is running just fine, but it isn't -- and you are hurting the engine by using it. An 11-4 will benefit your plane even more -- either APC or MA.
With the engine/plane combo that you are flying, propeller weight simply isn't an issue -- but pitch & dia are very real issues.
Oh yeah...I knew that the 11x7 was way too much....I just had that one for when I first got my Somethin' Extra's OS 46 engine and I just had that one......But I do have a 10x6 APC.....I have had others that suggest that I use a 10x5...I might try that sometime....I liked the 10x6 when I first was flying the Superstar too, though.
Thanks Alot though,
~Michael~