Right, we have all agreed (conceeded in my case) that more rake usually equals more weather helm. However, while discussing rake we are only taking into consideration the movement of the mast head. The act of moving the head back actually does two things. One, it tilts or rotates the sail on approximately on it's tack. Two, it pulls the entire sail aft since the mast is moving aft.
Which action is changing the weather helm or are they both responsible? The original question by Mr. Frank Noragon was, "What would happen if he moved the blocks at the mast step so as the move the foot forward?" I answered that it would increase the rake and then incorrectly stated that increased rake would decrease weather helm. Fellow listers quickly corrected my error...repeatedly. After being corrected for the third or forth time I decided to reeducate myself. During this review it occured to me that all I was previously considering was the rake. Rich's comments made me consider the placement of the sail in relation to the boat. As such I possed the question to Rich that moving the foot forward does increase rake but actually moves the bulk of the sail forward. What is the net effect? There it is, fire at will. Josh Rich, Less rake = less weather helm. If you go far enough, you end up with lee helm, which can be dangerous. I doubt you have enough adjustment to get that far though. Jake *Jake Brodersen* *"Midnight Mistress"* *C&C 35 Mk-III* *Hampton VA* *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Knowles Rich via CnC-List *Sent:* Sunday, May 03, 2015 1:36 PM *To:* Josh Muckley; cnc-list Cnc-List *Subject:* Re: Stus-List LF38 Mast Placement in the Step Hi All. I've been having an offline conversation with Josh, see below. Perhaps someone else might like to answer Josh's questions as I can't... Rich Knowles Nanaimo, BC INDIGO LF38 Almost sold in Halifax, NS. On May 2, 2015, at 17:41, Josh Muckley <muckl...@gmail.com> wrote: Doesn't the luff moves forward when you move the foot forward? The original poster was asking about placement of wood blocks. He had all 4 blocks forward of the mast and the mask back all the way aft. I assumed that in moving the blocks to move the mast forward that this would move the foot forward as well. No mention of changing headstay length so I assumed it to be the fixed point in all of this. Based on these assumptions the trailing edge of the mast and the luff edge of the sail would also move forward but the mast as a whole would have more rake. Right? Josh On May 2, 2015 6:53 PM, "Rich Knowles" <r...@sailpower.ca> wrote: I'm confused. Since the luff is attached to the trailing edge of the mast, if the mast rake increases the luff must move along with it. Perhaps someone else can make more sense if this than I can for you. I'm at work but will post our conversation to the masses when I get home. RK On May 2, 2015, at 15:16, Josh Muckley <muckl...@gmail.com> wrote: What you said was that moving the mast aft moves the center of effort aft. Since the original question was about placement of the mast foot being all the way aft and the consequences of moving it forward I assumed you were referring to the foot. I had originally stated that moving the foot forward would increase rake and then mis-stated that increased rake would reduce weather helm. I was quickly corrected and I conceeded that more rake equals more weather helm. So what is the combined effect of moving the luff edge forward but increasing rake? The two actions have opposite effects correct? Josh On May 2, 2015 2:28 AM, "Rich Knowles" <r...@sailpower.ca> wrote: Moving the mast aft moves the centre of sail effort aft and increases weather helm. Simple geometry. Rich Knowles Nanaimo, BC INDIGO LF38 Almost sold in Halifax, NS. On Apr 30, 2015, at 11:15, Josh Muckley via CnC-List <cnc-list@cnc-list.com> wrote: Moving the base forward should give more aft rake and reduce weather-helm. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Apr 30, 2015 2:13 PM, "N7FN--- via CnC-List" <cnc-list@cnc-list.com> wrote: Hi, I need to know, from you 38LF owners, where in the mast step your mast is positioned. Right now my mast is all the way aft in the step but I can see that the mast was positioned in the step farther forward at one time. The only reason that it is all the way aft is because that is where the workers in the yard put it. Any ideas about how the boat would sail if the mast was positioned all the way forward as opposed to all the way aft? I have seen adjustments for moving the mast in it's step on some sports boats. Frank Noragon C&C 38LF, s/n 001 Rose City Yacht Club Portland, Oregon _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
_______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
