Eagler's Nest
Airframes => Single Seaters => XL => Topic started by: 914pete on September 03, 2020, 09:22:56 AM
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I'm starting to line things up for the aileron ribs and was wondering what fasteners do you use to attach the aileron horn? 3/16" holes so AN-3 bolts/washer but do you use a Tee nut then with permanent thread locker?
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I used a little AN3 nutplate. Used little 4-40 machine screws to mount. Will also epoxy to ply rib.
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Nicely done, Keith. It is Keith, isn't it?
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Yes, it's Keith, and thank you. One thing that may not be obvious in the other photo is the angled aileron horn. I did that so the pivot point for the pushrod would be directly under the pivot point for the hinge bolt. Also a little overkill, I put dowels through the ply into the hinge block to share the shear force with the T-88.
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All I'm going to say is if you can shear that T88 on the bearing block with aileron loads..
"Folks.. we've got problems in River city.. it starts with T and rhymes with".. oh never mind. :))
An old friend (RIP) once said to me.. "Chuck, you know if you think about it the engine is glued on to a wood fuselage." :)
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I was worried about flight loads in a victory roll at 250 kts. Like I said, overkill. The only way you could get much of a shear load is a sticking hinge bushing.
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I like the angled horn. Was thinking along the same lines so mounted it like you did so as to make changes to the geometry quicker/ easier.
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I also did the same sort of alignment with elevator & rudder horns. Should help a little with cable tension changes.
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Keith, did you use 3/16 countersunk head bolts/screws to mount the aileron horns to the aileron end rib?
I’ve left a 1/4” gap at each end of the ailerons, but with 1/8” thickness for the horn and 1/8” for the head of a standard bolt I’m wondering if I’ve left enough space for covering and still have free movement.
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I just used standard AN3 bolts and nuts, never gave it another thought. I *did* make sure there was plenty of clearance to allow for the inevitable warping etc.in service over the years that someone else :o :) will have to deal with. IMHO, many try to get airplane parts to fit up too tightly when a "running fit" is actually better. (shrug)