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Boats for sale
| Free mast for Merlin Rocket - has a bend! Guildford |
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| Bruce Roberts classic 45 Valencia, Spain |
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| Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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List classes of boat for sale |
Laser topmasts |
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Andymac 
Really should get out more 
Joined: 04 Apr 07 Location: Derbyshire Online Status: Offline Posts: 852 |
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 Topic: Laser topmastsPosted: 23 Nov 11 at 3:11pm |
Yep, it was like a cup that fitted into the [top of] bottom section (not sure if it was split in 2).
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Rupert
Really should get out more
Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
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Posted: 23 Nov 11 at 3:01pm |
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One of the RS boats I was putting together for Juniors recently had a free-floating collar and no rivet. I assume this is what you mean? Looked like a good idea.
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Andymac
Really should get out more
Joined: 04 Apr 07 Location: Derbyshire Online Status: Offline Posts: 852 |
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Posted: 23 Nov 11 at 2:49pm |
A while ago, they were exploring a 'collet' to replace the current mast collar which is riveted in place. The rivet point is a known weakness, and there are currently marks on the upper / lower masts to line up thus when close hauled the rivet hole is in compression rather than extension. I don't know what ever came about with this collet, but it would have allowed the same aluminium tubing to continue to be used without a rivet hole weakening the tube. It would have the added advantage of 360 degree orientation of top section as well as end-to-ending thereby enabling the accumulative stresses to be spread.
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jeffers
Really should get out more
Joined: 29 Mar 04 Location: United Kingdom Online Status: Offline Posts: 3048 |
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Posted: 23 Nov 11 at 7:20am |
The boom sleeve was introduced a long time ago in response to a large number of failures around the kicker (vang to our colonial cousins) fitting due to excessive boom bend. Since this was introduced true is has changed the bencharacterisitcs but it was still possible to get the same amount on tension on just you boom looked like a banana.....
Same with the new controls, whilst they make it easier for non-gorillas to get kicker tension on the total potential (or optimal potential) has not actually changed. It was possible to pull too much using the old controls just as it is with the new controls.
As for the mast bending issue I have had 1 bent top section and that is on my current boat. It seems this issue is on the new builds, change in tube quality perhaps?
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Paul
---------------------- D-Zero GBR 74 |
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maxibuddah
Really should get out more
Joined: 06 Mar 09 Location: United Kingdom Online Status: Offline Posts: 1760 |
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Posted: 22 Nov 11 at 10:18pm |
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but if the intention is not alter the characteristics of the rig then a boom that doesn't bend as much will affect things as more vang can applied controlling the leach tension. If anyone cared about their performance then they would have to buy a new boom otherwise their boom would be bendy. I'm sure most got a new boom as it meant that it didn't break rather than improved leach tension, but the principle is the same.
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Everything I say is my opinion, honest
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JimC
Really should get out more
Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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Posted: 22 Nov 11 at 8:41pm |
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Emilio Castelli
Newbie 
Joined: 22 Nov 11 Location: Sebastopol, Ca Online Status: Offline Posts: 20 |
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Posted: 22 Nov 11 at 8:33pm |
It would make it a lot harder to permanently bend.
Look at the boom; used to bend and snap. I haven't seen a bent boom since the sleeve.
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www.castellivineyards.com
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bustinben
Far too distracted from work 
Joined: 15 Oct 06 Online Status: Offline Posts: 288 |
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Posted: 22 Nov 11 at 8:03pm |
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That would stop them snapping, but not bending.
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Emilio Castelli
Newbie
Joined: 22 Nov 11 Location: Sebastopol, Ca Online Status: Offline Posts: 20 |
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Posted: 22 Nov 11 at 8:02pm |
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A well designed sleeve in the current top mast would have solved the problem and would have been easy to retrofit. Too simple and too cheap I guess.
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www.castellivineyards.com
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doeywizard
Posting king 
Joined: 16 Jun 10 Location: United Kingdom Online Status: Offline Posts: 150 |
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Posted: 22 Nov 11 at 5:24pm |
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I understand that we cant use it entail after the olyimpics but when will they accatualy go on sale and will it be through laser performance?
Excuse any spelling mistakes
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