Originally Posted by capngeo
Now if I could just get rid of the mast pumping in the slip!
Join the club: in the marina berth with winds above thirty-something knots, Led Myne's mast pumps hard.
Another cruiser, a sailmaker
, offered to make a berth sail: a piece of stout sailcloth about twice as long as the mast diameter and as long as the mast diameter. His idea was for me to run it up the mainsail
sail track to the upper spreaders, where it would flap and disturb the vortex that causes the mast to pump
. I passed on the idea, just because it was a nuisance to open the gate, slide out the mainsail
slugs, run the berth sail up on the main halyard
(with a downhaul to provide tension and for dousing the berth sail), and of course every time I leave the berth to remove the berth sail and slide the mainsail slugs back in and close the gate.
Then I tried solution #2: buy a small fender
, the sort sold
for dinghies and runabouts. Longer than the bow-stern mast diameter, a tad fatter than the port-starboard mast dimension. Same deal: attach the main halyard, haul the fender
up to the upper spreaders with a downhaul for tension and recovery. I think it stopped the mast pumping. But i found the fender-mast bouncing at other wind
speeds and directions too much. Might try again with a second downhaul running to the end of the boom, to hold the fender off the mast.