[IMG_0556] I’m looking for information about placement of the wishbone on the mast. Prior owner raced and placed it lower than most I think to increase sail area. Anyone know of a good discussion of the placement and impact of the wishbone on sail dynamics?

Hi Dan, Do you suspect Sakina’s PO changed the length of her wishbone hangers ? That would be a very unusual change to make, but easily verified by looking at the standing rigging page in your manual. While sailing, your mainsheet and choker will determine where your wishbone sets. Topping lift …

Yes, I think my hanging lines are longer than normal. I’ve looked in my manual and see no dimension stated on the hanging lines. Does this photo help? [IMG_0810]

[image] sakina: I’m looking for information about placement of the wishbone on the mast. Prior owner raced and placed it lower than most I think to increase sail area. A direct side-view photo would be more informative about the height of the boom relative to the mast. But from looking at th…

Dan, I agree with Brian G about the hanger lines not being to long. The choaker line is a bit lower thru the turning block and I think that would help stabilize the wishboom a bit. I also think horizontal between the mast block and the boom end block would be optimal. If the line was pitched downwa…

[IMG_0399] Best I can do for a side view. Thanks for the feedback.

[IMG_1513] A better view perhaps.

It looks pretty normal to me. The rig is a pretty dynamic one. The boom hanging from straps, rather than bolted to the mast, gives it lots of room to move. You might think that means it needs lots of fussing and adjusting, but it’s very well thought out and largely self-adjusting. The mast flexe…

While I was writing this, I see you added another picture. Both an ideal view and a very pretty picture. I think you’re getting very good advice from the others. The one tiny comment I’d add is that it’s worthwhile to ensure that the boom doesn’t chafe the choker lines when it’s pulled tight to t…

Wishbone location

General

mikequill (Mike Quill ) May 14, 2026, 2:24pm 11

Hi Dan

When the hangers are in line with the mast, the wishbone centerline (bumpers) should intersect the mast about 7 inches ABOVE the centerline of the choker block as designed by Mark Ellis on a Nonsuch 30. Yours seem to look just fine.

Cheers

Mike Quill

Correct Wishbone Choker line length for a NS 30U?

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Wishbone location

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