I got my slowstick going with a new EPS400 F gearing. It goes great but now I see what all the fuss is about powered planes needing thrust adjustment. At full throttle it pitches right up into a turning stall. Only my problem is I have *no* idea how to make the plug to do the thrust modification.

The plane design is such that a plastic gearbox slides onto the front of a slim aluminum fuselage. I have heard that to acheive down & right thrust I need to carve a plug that will fit inside the aluminum sleeve and also into the gearbox.

Exactly how do I cut the angles in the wood to get 2-3 degrees down & right?

My LHS only had a peice of maple that fits *exactly* into the gearbox. So my adjustments to the angles will have to be on the fuse end.

I have some tools like a dremel, xacto & razor saw. My trouble is, I have never built a balsa plane so I don't know where to begin. I understand that 3 degrees is 9/32" over 6 inches. I figured I would draw the angle on a peice of heavy paper.

When I tried it this morning I ended up with a mess - plug ended up needing all kinds of sanding just to fit into the fuse. By the time I was done all the angles were wrong. There has to be an easier way than the trial and error (sand, see if it fits, sand some more) method I was using.

Thanks
Stuart

fprintf:

Sorry, unless you invest in some CNC machinery "Cut and fit" is the only way.

You can use a power saw, a belt sander, and several other power tools to make it easier and faster, but it's still cut and fit.

Bill.