Pearson Boats - Common Systems > Standing & Running Rigging and Fitting/Tuning
Mast Pumping
admin:
Interesting rigging suggestions from Bill Shaw on this topic - recovered from internet archives of "The Pearson Current" in 1994 (I could not recover the drawing that was referenced):
QUESTION:
I am the owner of a Sublime Pearson 323 (#54). A question I have related to mast pumping. Since we have put on jib roller furling, I have noticed that at times, when no sail is set, the mast has a tendency to pump. I have played with rig tension in order to minimize the pumping.
ANSWER:
As for the mast pump, adding a roller furler will often do this. The big furled sail starts to oscillate and then the mast starts pumping. Try putting a line around the mast at the spreaders. Tie off the lower end way forward, near the stem head fitting with lots of tension. If this works, you can add a small block at the height I’ve drawn here, sort of like a boom topping lift. Sometimes, a line around the furled jib led aft will work.
Rusty Pelican:
View my previous post on this subject.
One cause is that the forestay & backstay are too tight and the lowers are too loose.
Get a Loos gauge and trim the standing rigging accordingly
BobG
Captain Bri:
--- Quote from: Rusty Pelican on June 19, 2017, 11:13:43 AM ---View my previous post on this subject.
One cause is that the forestay & backstay are too tight and the lowers are too loose.
Get a Loos gauge and trim the standing rigging accordingly
BobG
--- End quote ---
Thanks Bob, great tuning guide! I really only updated this thread because I found Bill Shaws advice in the internet archives - I think that Bill's advise is only necessary when all else fails with regards to rig tuning.
I think the P323 naturally has a little lee-helm, hence your advice to rake the mast makes a lot of sense (after setting uppers and lowers). I also like the rig settings information and would like to publish your guide on the website.
Rusty Pelican:
Sure
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