Hi Dave, The 34+ mast base is pretty much fixed. You adjust the rake by a combination of forestay and backstay tension (Base backstay tension) and all should be fairly tight. If your forestay foil is flopping around (More than about 8-12 inches overall when you lean on it which is "loose" setting for light air) you have 2 potential issues: 1 your furler may not work correctly 2) You're diminishing the adjustable backstay's ability effectively do it's job of bending the mast to flatten the main close hauled and / or help in controlling heel.
There's a guide on the C&C site here: http://www.cncphotoalbum.com/doityourself/rod_rig_tuning.htm Here's a guide for the 99 which is a very similar boat with the thick mast cross-section / no runners: http://www.doylesails.com/downloads/CC99TuningGuide.pdf -Francois Rivard 1990 34+ "Take Five" Lake Lanier, Georgia Message: 1 Date: Thu, 30 Apr 2015 12:03:16 -0400 From: David Knecht <davidakne...@gmail.com> To: dwight veinot <dwight...@gmail.com>, CnC CnC discussion list <CnC-List@cnc-list.com> Subject: Re: Stus-List rig tuning Message-ID: <c945e8ca-1598-4bd1-96bc-b0d64b6a2...@gmail.com> Content-Type: text/plain; charset="utf-8" Hi Dwight- Now I am even more confused, but need to get back to the boat to confirm my recollection. As I remember it, when the backstay has no added tension, the roller furler track is quite slack and can be flopped around easily by hand. I will measure it this weekend to see how much flop. So I am having a hard time imagining how this tension could set the mast rake. On my previous 34, the mast base had wood blocks to move fore-aft and the deck had wood blocks to move fore aft and I thought that set the basal rake. The 34+ has the mast base under the table and flooring and I have yet to take everything out to get to it and see what is there. I also have not yet checked basic rake by hanging something from the halyard. I will do that as well. I don?t think the deck has blocks for positioning so maybe that suggests your idea that rake is set by the forestay. But if there is not much tension on the forestay at rest, it doesn?t seem to be doing much. If it were reall! y tight, you wouldn?t get much effect of tensioning the backstay with a masthead rig. So is the primary goal and effect of tensioning the backstay to put tension on the headstay to reduce curvature, or to put bend in the mast to flatten and reduce mainsail power. Dave Regards François Rivard 4111 Northside Pkwy, Nw Big Data Black Belt Atlanta, 30327-3015 IBM Sales & Distribution, Software Sales Usa Mobile: 770-639-0429 e-mail: jfriv...@us.ibm.com
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