Sounds about right to me, Dennis, except you really don't have a right triangle so the math will be slightly skewed. You might do better by drawing it up to scale and measuring the forestay. Why a new forestay, unless you don't like toggles? I assume the mast remains centered in the partners and the foot is allowed to reposition slightly so you won't induce bend in the column when you tension the rig.
Rich Knowles LF 38 On 2012-09-07, at 22:10, Indigo <ind...@thethomsons.us> wrote: > Since there is approximately 6 ft of the mast below the partners wouldn't > moving the foot of the mast one inch forward result in a 7 inch aft movement > of the masthead I would think you could move the foot one inch without > lengthening the forestay > > Jonathan > Indigo > > On Sep 7, 2012, at 21:29, "Dennis C." <capt...@yahoo.com> wrote: > >> Dwight, >> >> "I" is the deck to masthead measurement, i.e. the vertical side of the >> triangle. The forestay is the hypotenuse. >> >> I'm trying to return the rig configuration to where it was before the >> adjustments I made. I did have 10 inches at the gooseneck. Now just 5. >> Like I said, there's more to the story. >> >> Dennis C. >> >> >> >> From: dwight veinot <dwightvei...@hfx.eastlink.ca> >> To: cnc-list@cnc-list.com >> Sent: Friday, September 7, 2012 7:07 PM >> Subject: Re: Stus-List Mast rake adjustment >> >> Sorry Dennis, on reading again now I see what you are doing…got confused >> when you said the new hypotenuse was 46.487, compared to what it was at >> 44…actually I don’t see why you need to change the forestay at all, the head >> stay should have enough adjustment in it…does it not have a turnbuckle at >> the bow that you could lengthen a bit >> >> And another besides, why are you doing it…seems from what I have read Touche >> has consistently been at or near the top…trying for better performance or >> less weather helm >> >> Dwight Veinot >> C&C 35 MKII, Alianna >> Head of St. Margaret's Bay, NS >> From: cnc-list-boun...@cnc-list.com [mailto:cnc-list-boun...@cnc-list.com] >> On Behalf Of dwight veinot >> Sent: September 7, 2012 7:57 PM >> To: ' Dennis C. '; cnc-list@cnc-list.com >> Subject: Re: Stus-List Mast rake adjustment >> >> Dennis >> >> I believe for your 35-1 I=44 is the hypotenuse…you need the perpendicular >> measure along the mast from the deck to the masthead >> >> Dwight Veinot >> C&C 35 MKII, Alianna >> Head of St. Margaret's Bay, NS >> ) >> From: cnc-list-boun...@cnc-list.com [mailto:cnc-list-boun...@cnc-list.com] >> On Behalf Of Dennis C. >> Sent: September 7, 2012 7:14 PM >> To: Cn Clist >> Subject: Stus-List Mast rake adjustment >> >> OK, check my math and thinking on this one. >> >> I want to increase the rake in Touche's mast. I made some changes in the >> rig a few months ago which brought the masthead forward so the plumb from >> the masthead is only about 6 inches aft of the gooseneck. It used to be >> 9-10 inches to get 1 degree of rake. >> >> The foretriangle is close to a right triangle. I=44' and J = 14.5'. If I >> add the 6 inches to J (for the plumb drop from the masthead), I get a right >> triangle with sides of 44.0 and 15.0 and a hypotenuse of 46.487 (the >> forestay). >> >> So, if I want to move the masthead aft another 6 inches, I end up with a >> triangle of 44.0, 15.5 and 46.650. The difference in the lengths of the >> hypotenuses (hypoteni?) is 0.163 or about 2 inches. By my thinking, I need >> a new forestay about 2 inches longer than the existing one. >> >> There's more to the story than this, like it's really 5 inches each for the >> plumb and rake increase and I'm removing an extra toggle from the top but >> the math and method should be right. >> >> Am I right? >> >> Dennis C. >> Touche' 35-1 #83 >> Mandeville, LA >> >> >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2197 / Virus Database: 2437/5254 - Release Date: 09/07/12 >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2197 / Virus Database: 2437/5254 - Release Date: 09/07/12 >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com >> >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
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