OS .91 props.....
 

Goldberg 68" W.S. Extra 300L, OS .91 four stroke,...........what props would be good. Not really looking for speed, just good areobatic performance, and the best vertical I can get with that combo......Anybody with experience there???

RE: OS .91 props.....
 

APC 14X4W, or the 15X4W...I like the 14 myself.

RE: OS .91 props.....
 

Which style? Have you used these on this same application?

RE: OS .91 props.....
 

I don't understand the ques..which style?

And to your next...exact application, you mean your specfic plane/engine combo?
No.
I do, however fly Cap's, Extras and other 3D planes so I know about what your seeking, I think.
The lower pitch props slow you down, and the wide get's you better bite without over revving.
APC's are known to be the best on the 91-100 class engines.
I do know that at 13-14 bucks a piece, it gets spendy experimenting, but it is what it is.
Try both if you can afford it, and have the clearance.

RE: OS .91 props.....
 

By style, I meanat wide vs narrow. It's got a VERY wide Graupner 13.5x8, I believe, right now. turning at about 9600 RPM static @ 3000' of altitude. It's wide, right to the tip. I'll try an APC 14 x 6 and see what happens.......