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General control line discussion => Open Forum => Topic started by: Motorman on July 29, 2013, 06:20:41 PM

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Post by: Motorman on July 29, 2013, 06:20:41 PM

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Title: Re: Bolt on Control Horn
Post by: Brett Buck on July 29, 2013, 06:35:06 PM

Quote from: Motorman on July 29, 2013, 06:20:41 PM

I'm building a Brodak Tanager profile that uses bolt on control horns for flaps and elevator. Does anyone sell horns that are better than those thin nylon ones from Dubro? I'm pretty much resigned to make my own, just thought I'd ask before I spend the time. I remember those 2 bolt steel stamped ones we use to use on combat jobs, wish I could find a few of those.

   There are a bunch of "giant scale" RC control horns that are tougher than the usual CG and DuBro clear nylon jobs/

    Brett

Title: Re: Bolt on Control Horn
Post by: Trostle on July 29, 2013, 07:30:13 PM

Robart makes some nice bolt on horns that should suffice.  They come in different lengths also.

KT

Title: Re: Bolt on Control Horn
Post by: mike londke on July 29, 2013, 07:36:59 PM

You might like these.  I use a small square of 1/64 ply on the top and bottom of the elevator to beef it up. These are on all my combat ships and are very tough.  http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD932&P=0

Title: Re: Bolt on Control Horn
Post by: Garf on July 29, 2013, 07:41:35 PM

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCVZP&P=ML

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD937&P=M

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXAEJ6&P=ML

Title: Re: Bolt on Control Horn
Post by: David Hoover on July 29, 2013, 07:45:11 PM

If you use the ones that Mike suggested, make sure that you really beef up the mounting point to spread the loading.  All the control surface loading is coming through that small plastic mounting plate.  These were standard issue on Ukie 35's and I had one work its way through the balsa at an inopportune moment resulting in one of those sub-grade pullouts.  Other than that, they're great and infinitely adjustable.

Title: Re: Bolt on Control Horn
Post by: Steve Hines on July 29, 2013, 07:56:15 PM

Hobby Parts has metal ones, Hobby King, a friend of mine uses them on combat ship.

Steve

Title: Re: Bolt on Control Horn
Post by: Steve Helmick on July 29, 2013, 08:06:13 PM

Sullivan offers these, and Tower stocks them. If you look at the Tech Notes on all of those above, you'll see that they use 4ea. 4-40 screws to bolt them to your control surface....a lot of weight you don't need. IMO, 2-56 screws would be plenty.  H^^ Steve

(http://www.sullivanproducts.com/S557n01.JPG)

Title: Re: Bolt on Control Horn
Post by: Perry Rose on July 30, 2013, 04:31:29 AM

Any devise that compressed the wood will fail over time. The best bet is to cut out the balsa and install a plywood piece where the horn will go. I use a piece of dowel epoxied in and thin ply over that. The Du-Bro pieces are the best bet for the elevator as they are infinitely adjustable and will last forever. 

Title: Re: Bolt on Control Horn
Post by: john e. holliday on July 30, 2013, 08:43:22 AM

I put ply parts over area of the control horn top and bottom.