Mast vibration.
Posted: Sun Jul 12, 2020 1:26 am
I'm having some good vibrations...
Just spent the night, and half of yesterday, and the rest of today judging by the anemometer at dawn, at anchor, in winds around 25 knots, gusting to 40. Clocked 42 at two o'clock this morning.
But this isn't the weather report.
Point is, at about 22 or 23 knots, the main mast starts vibrating (mizzen too, but less), and it stops at wind speed about 28 and above. I can see it shaking in the middle. The vibration transmits, so the whole boat shivers. Strong enough to wake me up from deep sleep.
This is clearly some harmonics effect, maybe caused by the tension on the topping lift or some other tight line attached to the mast top. I'll figure which. I just wanted to know if this is a common phenomenon to all F30s, or simply my boat's quirk.
Just spent the night, and half of yesterday, and the rest of today judging by the anemometer at dawn, at anchor, in winds around 25 knots, gusting to 40. Clocked 42 at two o'clock this morning.
But this isn't the weather report.
Point is, at about 22 or 23 knots, the main mast starts vibrating (mizzen too, but less), and it stops at wind speed about 28 and above. I can see it shaking in the middle. The vibration transmits, so the whole boat shivers. Strong enough to wake me up from deep sleep.
This is clearly some harmonics effect, maybe caused by the tension on the topping lift or some other tight line attached to the mast top. I'll figure which. I just wanted to know if this is a common phenomenon to all F30s, or simply my boat's quirk.