bad vibes

[gstej]

Appreciate the quick response. Yesterday checking things in a breeze yesterday it seemed the topping lift was vibrating most. Pulling on it stopped the vibrations nicely, so today took it out to see what happens going forward.

Thanks much!

[Brion Toss]

Hello,
If the problem is the lift, little streamers, spaced along its length, might generate enough turbulence to stop the vibration, If not, then you could have a case of the dreaded vortex sheddings, which are not typically responsive to tune, Be in touch if the problem persists.
Fair leads,
Brion Toss

[gstej]

I have had some time to experience the problem continuing with the lift fully slack.

I should clarify we hear no audible sound, and in fact it is subtle enough that my wife cannot usually recognize it. I myself can sense it clearly each and every instance, and of course lie awake fretting about metal fatigue. When we first discovered the issue, I tried to sight up the mast and have never been able to visually see any movement in the spar (which is quite robust).

Have experiment with rig settings (currently 12% all 4 lowers, 15% caps and backstay) but no change. (Judging by sight we have maybe 2 inches of rake aft. Mast is in column.)


Thanks