What engine would you prefer for a Hangar 9 Pizazz and a Morris Su-Do-Khoi? I have an OS 50sx on the Morris right now but it just doesn't seem to have as much power as it should. What would be a good prop on there? I have also heard that the Irvine 53 is supposed to be even better than the 50sx. What do you think? Thanks.

os or satio 91 cool

2nd choice os 70 satio 72

I am flying the Pizazz with an OS 60FP 2C. Plenty of vertical, even though mine is quite a bit heavier than most. This is because I got mine free from a guy that wrecked it and didn't want to rebuild it. I'm still tweaking the CG back. I have it 1/2 inch behind the spar now, and it still looks like it needs to be back more. Does great knife edge.

Your Sudokhoi problem really stumps me . I am flying mine with a stock, right out of the box OS 46FX and I have vertical like a homesick angel. I've used 11-4, 11.5-4 and 12.25-3.75 props and had great results with all. My weight isn't super light on that one either as it weighs 4 lbs 9oz. I would assume that with a 50SX the Sudo should scream.

My fuel is 15% Byron and I like OS No. 8 plugs.

The 12.25x3.75 makes a huge difference.

I use it and the Irvine 53 on a Top cap. Works great. It is a little stronger than the OS 50, but the OS 50 should be enough, both are excelent engines.

I was thinking about trying some of the 12.25 x 3.75 props but was worried I would over-rev the 50. Another guy I talked to said he uses a 14 x 4 on his 50 but I need to make some new gear before I can go that big.

I don't think you would over-rev the 50 with the 12.25x3.75.

I agree with Flipper. There's a discussion right now about that prop, and most people say it loads down the 46 engines a little too much for a good spool up (when you are trying to power out of hovers and such) so I would say that it would be perfect for the 50.

Irvine 53 with tower muffler !!!!!!!!!!

Hey Texas - is that Tower muffler a tuned unit like the Performace Specialties Ultrathrust? How much do they sell for?

No longer support RCU