prop for ultra stick 60

[mkindrich]

I have an Ultra Stick 60 with a Magnum .91 on it. What would be a good prop for 3D/ fun fly stuff, and just general flying?

[TomLee]

At sea level, Magnum specs a 14 X 6 APC. A 13 X 8 should work fine also.

[Edge 540]

15 x 4 apc for OS and ST 90's but I've never run a magnum 90.

[50%plane]

Use a Vess Sport prop. It truely is a better prop. If you don't believe me, try it back to back with any other brand.


50%

[mkindrich]

sounds good guys! I appreciate the suggestions, and will use them. I am not at sea level though. I am at about 3,500 ft. will that make a big diff? I put a 14x8 on it last week. that won't over-run the engine will it? Thanks again.

[TomLee]

Here at 5400 ft, if I use a prop that big (14 X 8), I do not get the recommended rpm and the engine temp goes way up. Also, the engine is very difficult to tune.

If I use a 13 X 6 instead of a 13 X 8 the engine temp will go down about 50 deg.f and the engine will turn close to the recommended rpm's. The tuning gets easy as well.

Magnum does say to use a prop that will get the engine to about 10,000 rpm static.

Were it me, I would try either a 14 X 5 or a 13 X 7 APC with a 20/20 fuel mix. BTW, I own several.

[mkindrich]

thanks, i will try all that.