Cobra Trailer Jam-nuts (loose)

Your or you're?

For the first setting, maybe at least LockTite blue on the threads for the bottom nuts (would they be anywhere else?), set it up, tighten nuts (ouch), then let the LockTite set.

There is a possibility that these nuts unscrew when the trailer is driven over rough roads without the sailplane inside. If so, some of our Trailers are much more vulnerable than others!
�JJ

On Sunday, September 2, 2018 at 7:18:20 PM UTC-5, Charlie M. (UH & 002 owner/pilot) wrote:
Your or you're?

For the first setting, maybe at least LockTite blue on the threads for the bottom nuts (would they be anywhere else?), set it up, tighten nuts (ouch), then let the LockTite set.

UH,

Yep, I use blue LockTite on both the lower nuts and (why not?) the upper wing nuts too. In case everyone is not familiar with LockTite it is a liquid applied to the threads that will "glue" the nut to the threaded rod and prevent inadvertent loosing BUT still will allow manually removal at a later date. DO NOT USE THE RED COLORED LOCKTITE as this requires the application of HEAT to remove the fastener!

PS - Why not replace the fasterners with metric nylock (nylon insert) nuts and be done with it?

On Friday, September 7, 2018 at 9:05:03 AM UTC-4, OHM Ω http://aviation.derosaweb.net wrote:
On Sunday, September 2, 2018 at 7:18:20 PM UTC-5, Charlie M. (UH & 002 owner/pilot) wrote:
Your or you're?

For the first setting, maybe at least LockTite blue on the threads for the bottom nuts (would they be anywhere else?), set it up, tighten nuts (ouch), then let the LockTite set.

UH,

Yep, I use blue LockTite on both the lower nuts and (why not?) the upper wing nuts too. In case everyone is not familiar with LockTite it is a liquid applied to the threads that will "glue" the nut to the threaded rod and prevent inadvertent loosing BUT still will allow manually removal at a later date. DO NOT USE THE RED COLORED LOCKTITE as this requires the application of HEAT to remove the fastener!

PS - Why not replace the fasterners with metric nylock (nylon insert) nuts and be done with it?

Nylok nut, to work correctly, would need to go on plastic first. Another option would be to take the top plate off, add a jam nut, then reassemble, locking jam nut against the lower nut after tightening the lower nut against the upper. Takes almost as much time to describe as it would to do.
UH

Another Ship came in yesterday with Cobra...........yep, another loose nut! The rubber pad that protects the spar is also being compressed when the jam-nut is tightened, so UH's fix would be the best way to fix this issue. Jam-nut into another jam-nut. While we're looking things over in our trailers, it's not a bad idea to check all the adjustable fittings too. I have seen wing tip (assembly bar) adjustment so far out that the wing tip jumped out as trailer went down a rough road. Also found a scar on my root rib.............fixed it and next time I assembled the ship, the damned scar reappeared! Turned out the padding on the spar saddle, had compressed to the point the root rib started hitting the mid-span wing saddle, as the wing was pulled out.
Cobra is still the best trailer out there, thanks Spindleberger!
JJ