On 11/6/2021 1:21 PM, Brett Lombardi wrote:
KR builders,
Attempting to torque the AN bolts that attach the brackets to the main and
rear spars. The nylon in the nuts strip with minimal pressure, ie. 12
lbs/sq ft.
Anyone else have this issue and/or advice?
Thanks,
Brett
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I don't recall ever seeing a "torque to" foot pound read for the WAF
bolts. Snug them as tight as possible without crushing the wood. I
know, not specific, and mostly by feel, but it worked for me for 800
hours. The plastic in the AN nut for aircraft will be sufficient for
"one time use" to prevent the nut from coming loose. Many are use
multiple times without failure depending on the application. I would
suggest filling the holes in the spar with epoxy or at least varnish to
saturate the wood to prevent wood to bolt contact to help prevent
corrosion. If you've ever pulled a bolt out of a wood structure you'll
know what I mean.
Larry Flesner
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