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Old 09-23-2015, 12:30 PM   #26
taggt
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I'm sure I've seen Eagle hinges with threaded rod ends not that I'm advocating anything.


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Old 09-23-2015, 04:51 PM   #27
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Have the same rod-end set up as taggt on my ailerons. Original kit ailerons, no issues, three per aileron, been that way for 25 years and survived an aileron flutter/main-spar failure. Pretty massive for the loads, I don't lose any sleep.

An interesting discussion on these rod-ends on the helicopter side, with an S76 recently lawndarting in Nigeria. Emergency AD from Sikorsky calls for checking witness holes with lockwire and witnessing mark the jam nuts (duh!). Can't be too scornful though, I was test-flying an S76B the other day and one of the rod ends failed the "thread at least to the witness hole" test. Had to scrap the whole rod.


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Old 09-23-2015, 05:28 PM   #28
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Those Eagle hinges have a good service record AFAIK. But once the adjustment is made you won't ever need to adjust the hinges again. You will however carry those threaded parts subjected to bending loads on the airplane for the life of the airframe. It just doesn't feel right to me so I'll spend a bit of time aligning things on the front end and avoid having to worry about the rodends breaking through the treads.
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Old 09-23-2015, 06:12 PM   #29
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Threaded part heavier.
Can be made to last if correctly sized for the load, AND THE JAM NUT REMAINS TIGHT.
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Old 09-23-2015, 06:29 PM   #30
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In order to make the design bullet proof you would have to add even more weight -- like the beefier rod end you mentioned. Since the design buys you very little during the build, and nothing once the airplane is assembled, why bother?


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