Is the sig control horn with nylon horn useable for a 35 size sport plane? Is there a way to insure that the horn wont spin on the wire. Thanks John

I have used them in the past, but not on anything bigger than a .35 size plane.   Especially in cold weather like we have now.  The nylon gets very brittle with the cold and also with aging it will get brittle.  Save your self some grief and don't use it.

Bought a Sig flap horn to try on a homebuilt a while ago. When I opened the pkg., I tested it and it was way too flexible. I also could feel play in the plastic horn. No matter how you feel about your aircraft, don't use it. Your ships have value added by your labor on them. Don't use something that may cause a failure. All the ARFs that I have put together (C/L and R/C), the hardware bag gets the "round file"...
The anything that resembles a Sig style horn would too.

Neal I do know what a pain it is. This plane was almost ready to recover. I removed elevators cut open bottom of fuse and removed that sig horn. Replaced with all steel version. Now I need to open top of fuse to check what I used for flaps.