I wanted to share a technique I came up with to help determine where the exit holes should be on the fuse.

In pattern planes I’ve installed three pull-pull rudders and one pull-pull elevator. I’ve been able to reliably determine where the exit holes should be top to bottom, using a similar method to Troy’s above, however, I can never reliably determine where the exit holes should be in the front to back dimension. Above Troy demonstrates a method he uses with a ruler and eyeballs. Well, for some reason I can do this five times in a row and get three to four different results. This has to do with the angle at which I look at the ruler in reference to the fuse.

So I got to thinking, how can I make sure I’m looking at the correct angle? There’s got to be some way to measure this.

That’s when I realized that a string between the two end points, elevated above the fuse, and a square was the solution.

Hopefully the pictures below will be sufficient to explain the technique.

Keith B