Installing control horns - help!!!
 

I'm having a devel of a time lining up the three holes of the control horns. Anyone have any tricks???

RE: Installing control horns - help!!!
 

We know that the control surfaces are bevel which is the problem. Just put the horn on one side, mark it and drill it. The screws should be long enough for the other side to screw into the othe part of the horn, then as you tighten it down, it will conform to the shape with the control surface (aileron or elevator)

If you try to screw it together with the other side being flush on the surface, it may be a problem. Hold it out a ways.

RE: Installing control horns - help!!!
 

I think everyone has these problems from time to time. I have to drill and re-drill on some occasions to get them together. Some kits are harder than others...

RE: Installing control horns - help!!!
 

First off, you want to be hand-drilling these. Don't try and use a drill. Put the horn part on the control surface, and drill through the holes (however many there are). Then, push the screws through the holes so that they are sticking out on the backside. Put the backplate up to the screws--line one hole up and start screwing :) until it threads itself. Don't go any further. Then, put in another screw. Then, another until they are all threaded. Once they are all threaded, start tightening them down--be careful to keep moving from screw to screw while tightening, so that you don't put too much twisting force on the backplate (you'll see what I mean as you start to tighten them up). The key is to drill as straight of a hole as possible. If you want, drill one hole--put a screw in it, then drill another one--put the screw in, and keep doing it that way as well--that helps you keep the horn still while you drill.
Clear as mud? :D:D

RE: Installing control horns - help!!!
 

Yeah... buy the single screw control horns...

http://www2.towerhobbies.com/cgi-bin...?&I=LXD932&P=7

RE: Installing control horns - help!!!
 

I'd put the horn on the control surface in the desired place, make a hole with a very small flat screwdriver (quite easy to go through balsa), put one screw in and screw it into the other piece almost all the way in. Then realign the horn, drill the next hole with the same screwdriver, screw the second screw in. The control horns I'm using have 2 holes only, so the next step is to tighten the screws but you could make as many holes with the small screwdriver as holes are on the control horns.