airsail wrote: ↑Mon Oct 19, 2020 1:38 am
The mast doesn’t touch the bottom of the socket in the fuselage, maybe a 2mm gap between the two. It’s a good system as over time things wear, but the mast will move slightly further in maintaining a solid connection.
This is unlike Armstrong, where any wear will cause slop because the assembly screws aren’t pulling the joint tighter.
Thanks airsail
Now we know why it becomes loose, the taper combined with a gap under the socket.
My advice, without having had the Moses, would be:
Clean the parts with water before assembling, if possible.
Put the board on its back on the ground, and wiggle the fuselage on the mast, and tighten both bolts again, a few times.
Tightening harder is no good, can actually destroy threads, and wont help one bit.
It might still be necessay to re-tighten after the first session of course.
Above is what some do naturally, others dont.
Some might rig on grass with no sand, thus cleaner.
Some might keep the mast/fuselage connected for a long time, thus they wont experience the issue much.
It is the downside having a gap under a tapered fit, but the good thing is does not become wiggly over long time use and wear.
A more spot on fit without gap and with less taper, does not have the "screw becoming looser" issue, but it has other issues, more costly to make precisely, and might get loose and wiggle when worn, and require a "touch up" later.
Having an even wider tape angle will make the load on the screw and inserts a lot higher, so there is also a max angle you dont wanna go to.
Nothing is better than the other IMO, just different ways, with each their own advantages/disadvantages.
Nice to know exactly what the cause is now
Peter