Greetings,

Are there any tricks to getting a real measurement on engine thrust angles? Many people mention the thrust angles they are using, but never say how they measured it. Is it just an eyeballing excercise or are there specific ways to measure this?

Some mfg's even get down to the half-degree thrust angle - i.e. "Use 1.5 degrees of right thrust..." but it seems difficult to get this precise just by eyeballing it.

Should I just get a big protractor?

The reason I'm asking is I have a Cub that always wants to pull to the right on takeoff rollout. I bought it used and it looks like there is a lot of right thrust on the engine. I'd like to measure it and compare to the recommended angle.

Thanks much!

If you get a Robart meter you can bolt it to the front on the engine and get that .5 degree.

http://www2.towerhobbies.com/cgi-bin...?&I=LXET66&P=7

Dru.

P.S. In the directions it tells you how to use it for measuring the thrust angle. It is pretty easy after you do it a couple of times.

We had our club meeting last night and were talking about this issue. One method was to cut a piece of wood (1- 1 1/2 wide) exactly 11 3/4 inches long. Drill a hole in the center and mount to engine like a prop.Set in horizontal position, and for each 1/4 inch rearward movement of "tip" you have a 1 degree thrust change. This also works for up/down thrust, but of course you will need to turn wood stick to vertical position.

A 1/16" thk. washer behind the two left motor mount holes will give you 1.45 deg. right thrust.

howdy skydude, This site helped me out alot. Hope it can help you too. mildbill

trying this again, www.lrcc.net/offset_calc.htm now lets see if it posts. mildbill

one more time, www.lcrcc.net/offset_calc.htm

Thanks very much people! [8D]