Never heard of removing the core. Sounds stupid! I could see stripping cover. If the line is as long as the boat, you are probably OK.
Joel On Tue, Jun 21, 2016 at 2:18 PM, Chuck Gilchrest via CnC-List < cnc-list@cnc-list.com> wrote: > Joel, > > You could use the mid point as an average, but I also leave 3 or 4 wraps > of rope around the drum when the jib is fully furled just to have a margin > of error when the jib is furled too tight or too loose… > > And like Fred said, you could also use a calculus to determine the exact > length you needed. Or measure the line that came off the drum to begin > with… > > As was previously mentioned, some folks will remove the core of the rope > that sits on the drum to avoid extra bulk. My only concern with that > approach is when someone uses a winch to furl their jib. Removing the core > from a double braid rope will reduce tensile strength by nearly 75%. I’m > more inclined to use a single braided rope such as NER Regatta Braid, > Novabraid Sprint, or Samson Control DPX which will flatten out when spooled > on a drum, but will retain 100% of tensile strength. > > > > Chuck Gilchrest > > Half Magic > > 1983 LF 35 > > Padanaram, MA > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Joel > Aronson via CnC-List > *Sent:* Tuesday, June 21, 2016 2:06 PM > *To:* cnc-list@cnc-list.com > *Cc:* Joel Aronson <joel.aron...@gmail.com> > > *Subject:* Re: Stus-List Roller Furling Line > > > > Chuck, > > > > Why not measure from the mid-point of the drum's circumference? > > > > Be sure you have enough line to wrap it around a winch and tail it. > > > > Joel > > > > On Tue, Jun 21, 2016 at 2:02 PM, Chuck Gilchrest via CnC-List < > cnc-list@cnc-list.com> wrote: > > Measure the diameter of the drum full of line with the sail out all the > way. Divide by 2 and multiply by pi (3.1415). That will give you the > "circumference" or length of rope for one wrap around the drum. Yes it > will change as the rope unwinds from the drum but for the sake of argument, > let's use the max circumference as a constant. Measure the distance from > the drum to the furling line cleat, taking into account any guide blocks or > rollers that the rope needs to pass through. > > Now furl the jib taking care to count the number of turns on the furler > from fully deployed to fully furled. > > > > So the length calculation will be: > > Circumference of rope on drum times the number of furler turns plus > distance of drum to cleat plus 7-10' or so extra rope to allow line to be > handled in different spots of the cockpit. > > > > Depending on conditions such as wind and jib sheet tension while furling, > my jib can be furled either really tight or rather loose and sloppy. Tight > almost always requires extra turns on the furler. > Chuck Gilchrest > > Half Magic > > 1983 Landfall 35 > > Padanaram MA > Sent from my iPhone > > > On Jun 21, 2016, at 1:25 PM, Ronald B. Frerker via CnC-List < > cnc-list@cnc-list.com> wrote: > > Shouldn't it also change as the drum wrap gets thicker? > > Ron > > Wild Cheri > > C&C 30-1 > > STL > > > > > ------------------------------ > > *From:* Indigo via CnC-List <cnc-list@cnc-list.com> > *To:* cnc-list@cnc-list.com > *Cc:* Indigo <ind...@thethomsons.us> > *Sent:* Sunday, June 12, 2016 6:48 AM > *Subject:* Re: Stus-List Roller Furling Line > > > I may be totally wrong, but I don't think there is a direct correlation > between the length of the foot and length of furling line. The marker the > diameter of the drum, the longer the circumference and thus the longer the > line required for one rotation - but the circumference of a roll of sail > will be potentially very different. > > -- > Jonathan > Indigo C&C 35III > SOUTHPORT CT > > > > On Jun 12, 2016, at 07:01, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > > > > plus the foot length (24') > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > > > > > > -- > > Joel > 301 541 8551 > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > > -- Joel 301 541 8551
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