flyin' kingsfk

Double Elevator Control Horn with Ball Link

The new removable tail for the Reaction ARF requires you to disconnect the elevator pushrod every time the tail is removed. You supplied clevis is okay, but repeatedly putting it on and taking it off can cause wear and tear on the single horn, and the locking clip is easy to lose. A better system is to use a metal ball link instead of the clevis, sandwiched between two control horns. It's a simple idea, but gathering all the odd components can be a pain. BTE helps you avoid that hassle by offering a complete package.

Click to Enlarge The Package Includes all that is shown here.

1    Extra Control Horn (one comes with the ARF)
1    Metal Ball Link (resists heat better than plastic)
1    4-40 Hex Nut (to jam against the ball link)
2    5-40 x 5/8" Socket-Head Bolts (no-slop fit in link)
2    5-40 Nylon Insert Lock Nuts (for security)

Note: Two bolts and nuts are supplied - keep one set in your flight box just in case. They are an odd size and difficult to find.
Click to Enlarge Installation is Simple. Drill your horns for a good fit with the 5-40 bolt. Assemble your horns and ball link to get the proper spacing for a second slot (either side is okay). Carefully cut the slot with a sharp hobby knife. The block of balsa inside the elevator is about one inch wide, so you will have to nibble away at the wood with the knife tip. Scratch away the paint between the slots, and you are ready to glue.
Click to Enlarge The Finished Double Horn. Use a good epoxy to glue the horns in place and allow to dry. Now the ball link can be removed and screwed onto your elevator pushrod. Use the 4-40 hex nut to jam against the link to prevent it from turning. If you have already been flying your Reaction for a while, the double horn is easy to retrofit into existing ARFs.

Many thanks to Mr. Dave Rigotti of Ohio for the original implementation of this idea.

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