[Public-list] some rigging questions

Tue Jul 20 15:09:25 PDT 2004

Yeah Mike it makes great sense. That was my plan. It probably still will
be unless I hear of someone whose found the mack-daddy fixed gooseneck
fitting which is cheap, readily available, and fits the A30 mast and
boom profiles. (Or maybe I'll go to a machinist...)

If you look at the link I sent in the last message, you'll see that guy
with pearson triton did as you elucidated and ripped the track off his
mast, twice. Of course, he had a rigid vang with 12:1 purchase and a
loose-footed main. Most of the boom/main issues I asked about originally
were brought up through my reading of his website page. 

Eventually, Mr. Triton 381 got a new boom designed to handle the point
loads generated by rigid vang, fixed gooseneck, and loose foot (point
leech load). No more banana boom. However, I suspect it cost a pretty
penny, one I'd prefer to avoid, which is why I got started asking
gooseneck, boom, and main questions to the list...

You didn't think I came up with all that stuff on my own, did you?

;-)

Thanks again for the information! It is very helpful!

Ciao,

J Bergquist
Calliope #287

-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of Mike Lehman
Sent: Tuesday, July 20, 2004 4:21 PM
To: public-list at alberg30.org
Subject: RE: [Public-list] some rigging questions

I removed one of the flat head screws and replaced it with a hex bolt so
it 
would prevent the boom from going any lower that the bolt. I did mine so
the 
boom was at the top of the track, but you could really make it with a 
'stopper' above and below anywhere along the track. The is a little 
up-and-down play and if that bothered you, you could drill a tap a new
hole 
for a stopper bolt anywhere along the track. Is this making any sense??

Mike Lehman
"Gilleleje" #505

~~~_/)_/) ~_/) ~~

----Original Message Follows----
From: "J Bergquist" <j at ship.saic.com>
Reply-To: Alberg 30 Public List -- open to all
<public-list at alberg30.org>
To: "'Alberg 30 Public List -- open to all'" <public-list at alberg30.org>
Subject: RE: [Public-list] some rigging questions
Date: Tue, 20 Jul 2004 16:25:01 -0400

Mike-

Thanks for the responses.

When you eliminated the sliding boom on your boat, with what did you
replace it? Did you buy a new gooseneck fitting? Where did you find it?
Did you have to buy both a mast and a boom fitting? Or did you just put
screws in the track that stick out proud and thus prevent it from
sliding? I read some trials and tribulations about this at:

http://www.triton381.com/projects/maintenance/gooseneck.htm

I think you might find it interesting.

Do you really think the problem with my headfoil snagging the halyard
could be because of failure in the mast beam? This thought had occurred
to me, but I discounted it because I have not noticed other evidence of
mast beam failure (the forward cabin door having less clearance or
sticking, for example). My rig seems to not have changed tension much.
My mast beam has been repaired with a through-bolted aluminum plate, but
this is only on one side of the beam. I understand that the repair
should be made with plates on both sides of the beam.

Anyway, do you think that deflection of the mast beam could be
sufficient to change the masthead geometry enough to make the halyard
snag on the headfoil where it did not do so previously? I thought it
more likely that other changes I was making (like more frequent halyard
tension adjustment, raising and lowering the sail more often...we
started taking it down when we put the kite up rather than furling it)
were more likely causes than beam deflection. However, I am very
interested in your opinion on this point, because I know you have a lot
of experience with the mast beam repairs and their ramifications.

Speaking of rig tension, what do people use for adjusting backstays. I
have seen hydraulic rams and wheel-screw systems. Has anybody ever used
J-24 style block backstay tension adjusters?

Thanks for reading, and for the responses!

J Bergquist
Calliope #287

P.S. You got exactly the reason why I sprung for the rigid vang. I was
totally sick of the topping lift. It's a long story. Maybe I'll tell you
over beer sometime. Certainly it's too long for e-mail...

PPS. I have seen larry's internal halyards and harry's rigid vang. I was
interested to know if there are any others who have these features.

PPPS. Should I bring up the issue of loose footed mains to the rules
committee? I don't know about interest, but it's kind of why I asked the
question. I'm not about to go out and buy a new main just to have a
loose foot, but the next time I buy one, it might be nice. It gives you
much better control and consistency in the main foot tension, I think.
With the footed boltrope, there is a lot of friction so that when you
ease the outhaul in light air you need to scrunch the foot along towards
the mast to get it to take up and increase draft. Maybe I just need to
lube my boom track or something. Anyway, when I ordered the current main
2 years ago, the sailmaker wanted to make it a loose foot but I told him
I couldn't have that because of class rules, and I'm just wondering if
other people have some strong objection to loose footed mains? Because
if not, I think it would be a nice improvement in overall adjustability
of the main shape, both for cruising and for racing. Anything that
approves overall sailing pleasure, I for one am all for. Anything that
would make other boats obsolete on the racecourse, requiring new
equipment purchases, I would say that I am against. Since I don't think
that loose footed mains are going to provide any major competitive
advantage, but will contribute to increased sailing pleasure, without
additional cost (I don't think they charge extra for them, because
they're simpler to make than shelf foots anyway), I think it might be a
good change.

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