Well I got a good deal on one and now it's going on my extreme 330 goldberg profile...yahyahyah I know...what prop should I put on this thing? I've searched and searched but I can't find any mention of a good fun fly prop for it. I want to get as much thrust out of it as possible and the slowest speeds, and a nice rocket out of hover!! Help please?

Thanks guys

Let me get this straight, your putting a 91FX on a .40 sized CG extreme 330? It's gonna hover with just the trim tab half way LOL.

Your not really gonna do that are you?

Torque Roll is about to get a new definition!!! Make sure we see pictures of this one!!! For my 2 stroke I like the 15x4w or 16x4w. But those were pulling 9+ lb planes. The p-factor may make it unfliable, and ground clearance will be thin!

Let us know how it goes.

Use a 14 x6 zinger pro if you have ground clearance. Use lots of throttle control and prepare for vibration and torque to quickly put your airplane back to kit state

Joe, you will achieve vertical, but its gonna fly like sh%* with all the weight up front. JMHO.

Ed M.

Maybe he can use 1/4 inch steel plating for the rudder to counter balance the motor weight, hehe.

Joe, don't do it. You can probably get it to fly with some modifications and more dead weight added in the tail, but you are not going to like it. Why don't you save that engine for a nice 60 size profile like the ones coming out from www.extremeflightrc.com and meanwhile put a nice OS46FX or OS50 SX on it. If budget is to tight, put a TT 46Pro with a MCM muffler or Tower muffler on it.
Just trying to help and prevent your plane from a possible loss.
If you insist on using that engine, go with a Pro Zinger 14x6 prop.

I have plenty of ground clearence, not even a question, I can probably spin a 17 with not problems....so I got two opinions here, the pro zinger 14x6 or a 15/16x4w, may have to get both but the 16x4w sounds like fun!

We do it here all the time. 14x4 wide apc. If you are at any alt. at all. Were at 4200 and 91 on fun flys work well..

Run to lows and make some taller gear only takes a minute!

Dan