boom goose neck

[Ken Hutchins]

The boom, mast gooseneck; some of these are built with a plain toggle double pivot, others have some allowance for a few inches of vertical travel. Is there any benefit to either design? Gaff rig.

[paladin]

how bigga boat and are you gonna go offshore...and do your sails stretch.....

[Ken Hutchins]

Chuck, it is 36 LOD 60 sparred, possibly some off shore, Oceanus sailcloth so minimal stretch.
http://www.imagestation.com/picture/sraid180/pc627c37c4d56e67cb672f345f7d15e2d/f2fddb10.jpg

[ 03-01-2006, 01:26 PM: Message edited by: Ken Hutchins ]

[paladin]

I could go either way....Tana Mari has a fixed gooseneck and all the strain is on the headboard shackle and wire, although there is a rope tail that rides over the winch..
That said..Amihan, the Bruce Roberts offshore 38 had the gooseneck on a short track..with a multi purchase downhaul, that I found easier to handle under most situations. Both boats used running backs with homemade hyfield levers. I would assume that the pressure exerted on the mast would be the same whether you winched down on the mains'l pennant, or raised the main and tightened the downhaul. The downhaul just seemed easier to me...but I izz just an amchoor at this...

[John B]

I like the short travel on the double mast band. #1.. Its a double mast band so the load is spread
#2... You can tell visually when you have an amount of luff tension.IE: the gooseneck lifts off the bottom band. Thats how I set our throat/luff tension.

[Victorious]

She looks a lot like a smack to me.
Here in the UK the question of a few ins of adjustment would not apply
Heres a pic of one... built in the UK (Wash) Around 1912.
under normal sailing conditions the tack of the main would lift the Boom jaws clear of the Table.
Boom is heavy enuff to keep luff tension
Rig is much as it would have been when built.

http://www.victorious.co.uk/images3/BoomJawsTable.jpg

[kc8pql]

Got this one from PTF. Has about 6" vertical travel. Plan to rig it with a downhaul like Paladin describes.
http://i2.tinypic.com/otg0nl.jpg

[Ken Hutchins]

Thanks for all the input, pretty much what I expected for reasons. I'm going to do the double band with travel. Like a lot of other things boat related there are many ways and reasons for them. ;)

[Hwyl]

John B said exactly what I would have said.

[bugeye]

a gooseneck with some vertical travel allows the boom to rise up, putting slack in the topping lift and the lazy jacks. This is good, as you don't have to slack them off when setting sail, and remember to make them up again when bringing in sail. Some people seem to think that you shouldn't let the sail carry the weight of the boom, but that's nonsense.

[bugeye]

I just read all of the responses to this thread. Why would you frig around with what you're calling a downhaul, which is actually a cunningham. On fishing schooners, you set up your throat halyard so that the boom rides up to the top of its travel on the gooseneck, and then you get your luff tension against the upper band. This would be on the foresail, the mainbooms would always have jaws.

[J. Dillon]

Why are the belaying pins so long on the goose neck ? :rolleyes:

JD

[kc8pql]

Originally posted by J. Dillon:
Why are the belaying pins so long on the goose neck ? :rolleyes:

JD'Cause that's the way they came and I won't shorten them 'till the boat's rigged and I can tell just exactly how long I want them.

[J. Dillon]

Thanks and good luck with the hacksaw. Err save the cut off, will be good for something sooner or later. Maybe in a mooring post ?

JD

[kc8pql]

[ 03-01-2006, 11:05 PM: Message edited by: kc8pql ]

[kc8pql]

Boat displaces 12 1/2 tons. a 1/2" mooring post pin would be kinda skimpy don't ya think? :D

[ 03-01-2006, 11:04 PM: Message edited by: kc8pql ]