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JimC View Drop Down
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    Posted: 21 May 07 at 7:19am
Originally posted by bdu98252

I am not sure that you would be able to measure the difference in drag between a 2mm wire and 2.5mm rope trapeze line even in the wind tunnel.

Maybe I couldn't, but I'd bet a months wages that a competent engineer could.
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bdu98252 View Drop Down
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Posts: 30 		Post Options Post Options   Quote bdu98252 Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 07 at 9:55pm
If you look at any class where rope trapeze wires is not barred in the class rules it can be seen that the rope is the overwhelming. I have not seen  49er sailor using wire trapeze lines and an entire fleet of future olympic champions cannot be wrong. Steels density is around 7800kg/m3 whereas rope is just than water at 1000kg/m3 as it floats. Therefore although the rope is slightly larger than an equivalent wire then it can be seen it will be significantly less weight. I am not sure that you would be able to measure the difference in drag between a 2mm wire and 2.5mm rope trapeze line even in the wind tunnel.
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Posts: 80 		Post Options Post Options   Quote Dead Air Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 07 at 7:55am

I have seen the rope trap lines float out of the mast after a capsize, so make sure you have the little retainer things in!

 

I guess its one of those personal preference things, try another boat that has rope instead of wire, see which you prefer
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Iain C View Drop Down
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Posts: 1113 		Post Options Post Options   Quote Iain C Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 07 at 8:32am

Originally posted by Jack Sparrow




I remember another thread where we talked about breakable toe straps... are you reconsidering your choice now Iain?
[/QUOTE]

Yep!!

Problem is on my boat there are so mant toeloops it would cost a small fortune if they were the proper things, I'm thinking about just replacing the rope with really heavy bungee.  'spose I could always go for the screws through car mat solution on the new boat...
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Posts: 1 		Post Options Post Options   Quote ivo.tedbury Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 07 at 6:36pm

Not sure about other Rs500s but our one that we have twin wire rigged has 3mm rope. It works fine and is considerably lighter than wire.

It might also be better than wire in a lighting storm!
Rs500 Twin Trapeze
http://www.youtube.com/watch?v=TnRVhQCedPc
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Jack Sparrow View Drop Down
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Posts: 2965 		Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 07 at 1:52pm
Originally posted by Iain C

Originally posted by Iain C

I just used bog standard sheathed dyneema on the Cherub...was a bit bouncy to start with but it's fine now. Loads cheaper too!

Ignore this advice!  Whoever posted this was a complete divvy of the highest magnitude (and a tight git)

Er, so that will be me then.  After 3 years of cheapo trouble free sailing the trap snapped on the knot when I was going mach 9 with my foot in the toeloop.  Cue instant capsize and me dangling over the hull of the boat by my foot, not funny.  Somehow I got out without hurting my foot too badly, however I snapped a carbon stick the second it happened.

I got some groovy hertzog style stuff from P&B, and the best bit is...it's YELLOW!!




I remember another thread where we talked about breakable toe straps... are you reconsidering your choice now Iain?
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Strawberry View Drop Down
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Posts: 1337 		Post Options Post Options   Quote Strawberry Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 07 at 12:21pm

Originally posted by 29er397

I'd make the splices a generous length at each end, that way if you spot any points that are wearing a bit, you can just move the entire rope up or down a bit and there will be a fresh bit of rope where the wear point is - an extra meter either end is a lot cheaper than an entriely new bit of rope, seems to work for me.

Top tip - I like it!
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Andrewst View Drop Down
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Posts: 129 		Post Options Post Options   Quote Andrewst Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 07 at 12:10pm

Should be ok its for a I14.

I have ordered it now, 2.5mm excel D12. Hoefully should do the job.
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Posts: 99 		Post Options Post Options   Quote FreshScum Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 07 at 11:44am
Some class rules limit the materials that trapeze wires may be made of. If they do, they usually say that to a certain distance from the mast, they must be made from wire. Worth checking.
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Posts: 72 		Post Options Post Options   Quote a_stevo Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 07 at 6:12am
we use 3mm dynema on the 12, replace it every yearor so 'cos they chafe pretty bad. good call to run them through some cover at the shackles or the trap fittings.
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