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

_______________________________________________

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Reply via email to