Next message: John Howard: "Re: [world-cruising] Re: boat shopping"
One reason to movement at the mast collar is to allow some mast bend
paricularly when this is controled with an inner forstay
----- Original Message -----
From: <>
To: <>
Sent: Wednesday, April 11, 2007 6:09 AM
Subject: RE: [world-cruising] Re: boat shopping
> Sorry Michael, but you are not correct in this matter. All the
keel-stepped
> masts I have seen are wedged at the partners (where the mast passes
through
> the deck) with wooden wedges (or Spartite). The partners are not simply a
> hole in the roof but are an integral part of the rig which stiffens the
mast
> and helps keep it in column. There is DEFINITELY a "pinch" effect.
>
> By the way, the "pinched spaghetti" example was given to me by Brion Toss,
> and it is very apropos to the situation.
>
> Your statement that the deck would be damaged by "mast movement" is
correct,
> IF THE MAST MOVED. But in fact your mast should not be moving at the deck
> level. What does happen with keel-stepped boats is that there is a
> squeezing effect from the rig under tension which forces the deck upwards.
> That is why a tension rod or tangs are usually added to hold the deck
down.
> It is the opposite of the deck-stepped mast with the compression post.
>
> That's another difference, I suppose, that the cabin roof is under a
> different kind of load with the different mast configuration.
>
> Keel vs. Deck Stepped? It is a matter of preference as in all things
> nautical. Ask ten skippers, get ten answers...
>
> Regards
>
> Jeff
>
>
> Jeffrey M. Stander
> listserv moderator and webmaster
> s/v BEATRIX - KP44 #276 (1980)
> SKYPE ID: pacific_voyager
> www.kp44.org
> www.svbeatrix.com
>
>
> -----Original Message-----
> From:
[mailto:]
> On Behalf Of delviento2
> Sent: Wednesday, April 11, 2007 5:09 AM
> To:
> Subject: [world-cruising] Re: boat shopping
>
> Respectfully, I disagree with Jeff. The pinched spaghetti illustration
does
> not work because a keel-stepped mast is not "pinched" where it goes
through
> the deck, in fact, it is not attached to the deck in any way. .......
>
>
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