Hi Guys:

I’m building a KAOS 60 from an old Great Planes kit that I had stored away. (This is a revised version of the original KAOS 60 that was designed by Joe Bridi.) I have a question about the (metal) elevator horn supplied in the kit: Does anyone know why the horn has a forward offset? I measured the angle at approximately 17 degrees off the vertical. (See copy of the plans showing the elevator horn.)

From what I can tell, this will result in less down elevator movement, and more up. So the overall effect is elevator differential.

Does anyone know why the elevator was designed this way, and what effect it will have on the flight performance of the airplane?

I have built five KAOS kits over the years, and I’ve usually swapped out the offset elevator horn and replaced it with a conventional horn (with zero offset). I have never noticed any problems with this setup.

Any information on this will be very helpful. Thanks!