Dennis
I misunderstood what you meant by the dimension I. I thought the convention was that I was the distance from the top of the forestay to the foredeck at the forestay chain plate or in other words the length of the forestay In that case I is the length of the hypotenuse of the fore triangle. Following the same convention the dimension P is defined as the distance from the top of the boom at its connection point to the mast to the top of the mast. And also the dimension J is the distance aft from the forestay chain plate to the mast at right angles to the mast. So with this convention the Pythagoras theorem would be: J ² + (P+x) ² = I ² Where x= the distance from the top of the boom down to the deck at the right angle intersection with J. So the way I see it P+x is the vertical side of the right triangle, J is the horizontal side of the right triangle and I is the hypotenuse. 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 10:29 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List Mast rake adjustment 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 dont 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 <http://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 <http://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 <http://www.cncphotoalbum.com/> CnC-List@cnc-list.com _____ 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
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