Chuck, I cannot pull the furling line when it is loaded. I know that people try doing that with a winch, but from what I know it is not what furler manufacturers recommend. I furl only when the genoa is slacked (usually a bit down wind, during a tack, or when sheets slacked if little wind).
In order to split this hair... Assuming that the radius of the sail wrapped around extrusion is the same as the radius on the drum, the force would be equal to what the sheet is pulling. I think that one might assume that the leverage is 2:1 (the drum radius is double of the sail radius), so the force is half. I am not sure how safe is that assumption. Marek From: Chuck Gilchrest via CnC-List Sent: Monday, May 29, 2017 12:35 To: cnc-list@cnc-list.com Cc: Chuck Gilchrest Subject: Re: Stus-List furling line Marek, The tensile strength of 5/16” XLE polyester double braid is roughly 3600 lbs. Even if one were to assume a 5:1 ratio to develop a “safe working Load” you’d still be looking at 720lbs. I can’t imagine that there would be that much pressure against the drum..you certainly wouldn’t be able to pull the line if it were loaded that heavily. Chuck Gilchrest S/V Half Magic 1983 LF 35 Padanaram, MA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Marek Dziedzic via CnC-List Sent: Monday, May 29, 2017 12:22 PM To: cnc-list@cnc-list.com Cc: Marek Dziedzic <dziedzi...@hotmail.com> Subject: Re: Stus-List furling line Anyone calculated what should be the working load strength for the furling line? It does not count, if you don’t ever use it for reefing, but what if you do? One could probably run some calculations (e.g. based on the working load on the sheet and the ratio of the diameter of the furling drum and the sailed furled on the extrusion), but if there is a ready-made solution, I would be interested. thanks Marek 1994 C270, Legato Ottawa, ON From: Chuck Gilchrest via CnC-List Sent: Monday, May 29, 2017 12:14 To: cnc-list@cnc-list.com Cc: Chuck Gilchrest Subject: Re: Stus-List furling line +1 on Cajun Rope. Very reasonable pricing. Also check with R&W Rope in Massachusetts www.rwrope.com<http://www.rwrope.com> and search under Novabraid XLE as that is the same rope sold by Cajun (made by Novabraid from Nova Scotia). R&W does free US shipping for orders over $30. Jamestown Distributors is also currently having a sale on the same line https://www.jamestowndistributors.com/userportal/show_product.do?pid=54238&familyName=Novabraid+XLE+Polyester+Double+Braid+per+Foot The line used on my boat with a Furlex furler is 5/16” (8mm). 3/8” would be too large diameter and take up too much room on the drum and I only have a 135% jib on my boat. Chuck Gilchrest S/V Half Magic 1983 35 Landfall Padanaram, MA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Frederick G Street via CnC-List Sent: Monday, May 29, 2017 11:54 AM To: cnc-list@cnc-list.com Cc: Frederick G Street <f...@postaudio.net> Subject: Re: Stus-List furling line http://www.cajunrope.com — Fred Fred Street -- Minneapolis S/V Oceanis (1979 C&C Landfall 38) -- Bayfield, WI On May 29, 2017, at 10:49 AM, Neil Gallagher via CnC-List <cnc-list@cnc-list.com> wrote: Are you thinking of Cajun Rope? Neil Gallagher Weatherly 35-1 Glen Cove, NY On 5/29/2017 11:28 AM, ahycrace--- via CnC-List wrote: Looks line I have to replace the furling line on Liberty"s furling drum. What was the name of that mail order company that sells reasonable priced quality line I just cant remember it. ( Old timers syndrome. ) Gary "Liberty" 38' MK II
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