Re: M_Boats: Mast Base Block for Bimini
In a message dated 2/14/03 9:31:17 AM, stever@mail.saabnet.com writes: << I am thinking of putting a block of wood under the mast base bracket to raise the boom, and have more headroom under a bimini. I would need new shrouds, a new forestay and a tether to hold down the tack of the jib. Plus some long bolts to fasten the bracket through the wooden block. Am I missing anything here? Are there any reasons not to do this? Thanks, Steve R. >> Steve, Another alternative is to recut your main (raise the foot) so as to not incur cost of new rigging. This would obviously reduce your sail area somewhat, and you would not want to take too much or you would risk upsetting the CE balance. If you only needed a few inches, it might work. Scott Grometer M15 #478 'bebe'
Scott, If Steve is going to recut the main, how about replacing a bit of the lost SF with a bit more length along the foot. My mainsail, anyway, leaves about 10" of boom extending beyond the clew. I'm sure the right sail could get 6-8" more foot length onto the boom. I keep looking at that spar, just knowing it's wishing to meet it's full potential. But maybe my main is just cut a little short. Bill Riker M-15 #184 Storm Petrel -----Original Message----- From: montgomery_boats-admin@mailman.xmission.com [mailto:montgomery_boats-admin@mailman.xmission.com]On Behalf Of Wilsometer@aol.com Sent: February 14, 2003 1:47 PM To: montgomery_boats@mailman.xmission.com Subject: Re: M_Boats: Mast Base Block for Bimini Steve, Another alternative is to recut your main (raise the foot) so as to not incur cost of new rigging. This would obviously reduce your sail area somewhat, and you would not want to take too much or you would risk upsetting the CE balance. If you only needed a few inches, it might work. Scott Grometer M15 #478 'bebe' _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
At the risk of revealing my ignorance, wouldn't making the main shorter, but wider at the base, lower the center of effort and, therefore, increase stability? Is "CE balance" "Center of Effort balance"? Obviously, Jerry designed the M15 rig for optimal performance, but if Steve just wants more comfortable "messing about in [his] boat[ ]", lowering the center of effort might make his boat less lively, but more seaworthy, mightn't it? ----- Original Message ----- From: "Bill Riker" <wriker@mindspring.com> To: <montgomery_boats@mailman.xmission.com> Sent: Saturday, February 15, 2003 10:02 AM Subject: Mast Base Block for Bimini Scott, If Steve is going to recut the main, how about replacing a bit of the lost SF with a bit more length along the foot. My mainsail, anyway, leaves about 10" of boom extending beyond the clew. I'm sure the right sail could get 6-8" more foot length onto the boom. I keep looking at that spar, just knowing it's wishing to meet it's full potential. But maybe my main is just cut a little short. Bill Riker M-15 #184 Storm Petrel -----Original Message----- From: montgomery_boats-admin@mailman.xmission.com [mailto:montgomery_boats-admin@mailman.xmission.com]On Behalf Of Wilsometer@aol.com Sent: February 14, 2003 1:47 PM To: montgomery_boats@mailman.xmission.com Subject: Mast Base Block for Bimini Steve, Another alternative is to recut your main (raise the foot) so as to not incur cost of new rigging. This would obviously reduce your sail area somewhat, and you would not want to take too much or you would risk upsetting the CE balance. If you only needed a few inches, it might work. Scott Grometer M15 #478 'bebe'
I think moving the CE up 6" or 7" and back 6" or 7" would not produce a noticable difference in sailing charastics. It would increase the lead (the distance CE is designed to be behind the center of lateral resistance, to produce weather helm) by a very small distance but IMHO not enoughto make a noticable difference in weather helm. Any problems with too much weather or lee helm can usually be corrected with mast rake. Wayne ----- Original Message ----- From: "Honshells" <chonshell@ia4u.net> To: <montgomery_boats@mailman.xmission.com> Sent: Saturday, February 15, 2003 9:05 PM Subject: M_Boats: Center of Effort?
At the risk of revealing my ignorance, wouldn't making the main shorter,
but wider at the base, lower the
center of effort and, therefore, increase stability? Is "CE balance" "Center of Effort balance"? Obviously, Jerry designed the M15 rig for optimal performance, but if Steve just wants more comfortable "messing about in [his] boat[ ]", lowering the center of effort might make his boat less lively, but more seaworthy, mightn't it?
----- Original Message ----- From: "Bill Riker" <wriker@mindspring.com> To: <montgomery_boats@mailman.xmission.com> Sent: Saturday, February 15, 2003 10:02 AM Subject: Mast Base Block for Bimini
Scott,
If Steve is going to recut the main, how about replacing a bit of the lost SF with a bit more length along the foot. My mainsail, anyway, leaves about 10" of boom extending beyond the clew. I'm sure the right sail could get 6-8" more foot length onto the boom. I keep looking at that spar, just knowing it's wishing to meet it's full potential.
But maybe my main is just cut a little short.
Bill Riker M-15 #184 Storm Petrel
-----Original Message----- From: montgomery_boats-admin@mailman.xmission.com [mailto:montgomery_boats-admin@mailman.xmission.com]On Behalf Of Wilsometer@aol.com Sent: February 14, 2003 1:47 PM To: montgomery_boats@mailman.xmission.com Subject: Mast Base Block for Bimini
Steve, Another alternative is to recut your main (raise the foot) so as to not incur cost of new rigging. This would obviously reduce your sail area somewhat, and you would not want to take too much or you would risk upsetting the CE balance. If you only needed a few inches, it might work.
Scott Grometer M15 #478 'bebe'
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