| |  Re: replacement bolt rope
[Re: PTP]
#101954
03/29/07 12:10 PM 03/29/07 12:10 PM |
Joined: Sep 2001
Posts: 756
Newport, RI wildtsail 
old hand
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old hand
Joined: Sep 2001
Posts: 756
Newport, RI | Halsey-UK has done most of my work including the bolt rope on my 6.0. They are located in Mystic, CT their website is www.ukhalsey.comOther sail makers i'd reccomend but haven't had much experience with are Farrar sails in New London, CT or North Sails in Portsmouth, RI. Not sure about anywhere in Northern New England though, i'd reccomend staying with lofts that have experience in catamarans or at least modern one designs. | | | Re: replacement bolt rope
[Re: jdaf31r]
#101955
03/29/07 12:20 PM 03/29/07 12:20 PM |
Joined: Aug 2005
Posts: 2,921
Michigan PTP
Carpal Tunnel
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Carpal Tunnel
Joined: Aug 2005
Posts: 2,921
Michigan | Who to send it to. My F18HT main needs a replacement bolt rope. The current one is a hard plastic tube, should this be replaced with a similar tube, or just a traditional rope. What lofts in New England would be good to send it to. One that I contacted said mid june would be the earliest it could be done. ARRGG the lakes melting fast! there is no reason it should take a long time or that you should have to wait until June. Fixing the bolt rope shouldn't take long and it isn't like it is a structural component of the sail, it just holds the sail in the luff track... the fabric of the luff does all the work when you torque the downhaul (I made this realization when I talked with Schurr) | | | Re: replacement bolt rope
[Re: PTP]
#101957
03/29/07 01:23 PM 03/29/07 01:23 PM |
Joined: May 2003
Posts: 4,451
West coast of Norway Rolf_Nilsen
Carpal Tunnel
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Carpal Tunnel
Joined: May 2003
Posts: 4,451
West coast of Norway | The luff rope is a structural part of most beachcat sails I have seen. Unless the bolt rope is there to take downhaul loads, you will need some really heavy duty luff reinforcement. Probably some special 10.000 denier spectra tape or similar.
What usually happens is that the cloth in the luff stretches until a certain point when downhaul is applied. From that point on, the luff rope will take all additional load from the downhaul when you increase tension. This can vary between sailmakers of course, but I would be leery of a beachcat sail buildt in a different manner considering our 16:1 downhaul loads. The downhaul loads, bending our masts, are huge.
If the luff rope did not take any structural loads, what would the point be in installing the luff rope in such a manner that you have to apply at least some downhaul before the sail sets well?
I am not a pro tough, so if anybody know better, please enlighten me.
Replacing a luff rope is not much work at all. I am pretty certain I would need just an hour or two at home. A professional sailmaker in his workshop should be able to do it faster. It is a simple and quick process, but you need some beachcat experience to get the amount of "pre-tension" in the luff rope right when you sew the rope to the sail at the foot. | | | Re: replacement bolt rope
[Re: Rolf_Nilsen]
#101958
03/29/07 01:30 PM 03/29/07 01:30 PM |
Joined: Aug 2005
Posts: 2,921
Michigan PTP
Carpal Tunnel
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Carpal Tunnel
Joined: Aug 2005
Posts: 2,921
Michigan | The luff rope is a structural part of most beachcat sails I have seen. Unless the bolt rope is there to take downhaul loads, you will need some really heavy duty luff reinforcement. Probably some special 10.000 denier spectra tape or similar.
What usually happens is that the cloth in the luff stretches until a certain point when downhaul is applied. From that point on, the luff rope will take all additional load from the downhaul when you increase tension. This can vary between sailmakers of course, but I would be leery of a beachcat sail buildt in a different manner considering our 16:1 downhaul loads. The downhaul loads, bending our masts, are huge.
If the luff rope did not take any structural loads, what would the point be in installing the luff rope in such a manner that you have to apply at least some downhaul before the sail sets well?
I am not a pro tough, so if anybody know better, please enlighten me.
Replacing a luff rope is not much work at all. I am pretty certain I would need just an hour or two at home. A professional sailmaker in his workshop should be able to do it faster. It is a simple and quick process, but you need some beachcat experience to get the amount of "pre-tension" in the luff rope right when you sew the rope to the sail at the foot. What you say makes sense and I know you have the experience, but then why would our original Bimare sails (I assume that the original poster's 18HT sail he is referring to is the original Bimare sail) only have a hollow plastic tube for the luff rope then? | | | Re: replacement bolt rope
[Re: Rolf_Nilsen]
#101959
03/29/07 01:42 PM 03/29/07 01:42 PM |
Joined: Apr 2002
Posts: 805
Gainesville, FL 32607 USA dacarls
old hand
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old hand
Joined: Apr 2002
Posts: 805
Gainesville, FL 32607 USA | Lots of noise printed here with little real knowledge of Italian Bimare boats: The bolt tube just keeps the sail in the track. I have replaced the tube in several Bimare A-cat sails that needed attention after several years of hard use.
The plastic tube is polyethylene, and the Bimare A-cats with Riba mast need a 5/16 inch tube (1/16 inch wall) available from any US scientific supply house (Fisher). (I used the same size polypropylene tubing for the last repair because it is a bit harder). You get 100 feet for $40 and need just 30 feet.
1. Cut the sewn threads that hold the crushed tube in place and pull it out of the sleeve.
2. Push 2 feet of line up inside the lower 2 feet of new tubing, and maybe a piece at the top, sew it in as before-- by hand.
3. Insert tubing from the bottom of the sail, sew in place at the top, then stretch to match, and sew at the bottom. Done. Do not even need to take the batten cap ends off
4. Do NOT buy metric sizes because the wall thickness is 1 mm which is too thin. It will crush.
5. 1/4 inch is too small and weak, and 3/8 inch tubing is probably too fat for your Riba mast, so check the stock tube.
Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison
| | | Re: replacement bolt rope
[Re: dacarls]
#101962
03/29/07 01:48 PM 03/29/07 01:48 PM |
Joined: Jan 2005
Posts: 6,049
Sebring, Florida. Timbo
Carpal Tunnel
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Carpal Tunnel
Joined: Jan 2005
Posts: 6,049
Sebring, Florida. | Dave, did I tell you about the mosquitoes that get in our plane in Bombay? We need some of those air curtains, Quick!
Blade F16
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