I have located the source of the wing pop sound with the assistance of my hangar neighbor. I made a mark on the wing attachments and found there is a tiny bit of play, less than 1/64”, on the attachment points at the wing bolts and when the wing is flexed it builds up a little friction and the releases it when the wing is flexed the other way. The reverberation though the spar and wing cavities amplifies the tiny sound like an acoustic guitar. I’ll pull the wing bolts and clean the attachment brackets at the next maintenance and replace the bolts with AN174 close tolerance bolts, but there is for sure no structural issue or delamination of any joints.
Adam On Fri, Oct 25, 2024 at 6:40 PM Larry Flesner via KRnet < krnet@list.krnet.org> wrote: > > On 10/25/2024 5:16 PM, Adam Deem via KRnet wrote: > > My right wing, apparently in the stub wing makes a slight pop like > > there is something sticking and tension releasing when the wing is > > lifted and then pushed down again. > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > There should be absolutely nothing in the structure that moves one > surface against the other. Find a helper to pin point the noise and > don't fly it until you determine it is not structural. Marks thought of > it being something component wise is a good bet. Check for cracked glue > joints where the center spars enter the fuselage and pass through. If > you can make it make the noise consistently it shouldn't be that hard to > find. > > Good luck. > > Larry Flesner > > -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet >
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