I have a Hangar9 Fokker DVII ARF with an OS .61FX engine. I had been swinging a 13 x 6 wooden prop (Zinger) and with my second flight, I ran the 14 x 6 wooden (Also a Zinger) -

I was wondering, since I like how it handled the second time around and how it looked on the plane, if I would be able to continue to swing that prop without screwing up my engine?

I know at times we can't go by company guidelines, because OS .91FX loved a 14 x 7 triple prop (Master Airscrew plastic) on my late Extra and it loved it.

Pete

My .61FX ran quite well with an APC 13x6...the Zingers put more load on an engine...a 14x6 Zinger...hmmm...

A 14x6 is quite a load for a .61, and will probably shorten the life of the connecting rod, among other things...but if you don't run it too lean...it should be ok for a while.

With the hot weather we've been having, I don't think I would do it...but it's your engine...(like I said, it might be ok for a while, but...? )

Thanks, I'll do that then. I appreciate the help.

Pete

Might want to consider going to a lower pitch. Go with a 14 x 5 which would be less stress on the engine.

A 14x6 prop on a .61 is asking a lot, it is more of prop for a .75 . You could easily over heat the motor. Best to stay with the 13x6. The only .61 motor I ever owned that could possible turn a 14x6 was a Fox Eagle III, the motor was built for torque not for speed.