Edition
Boats for sale
| Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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| Laser 28 - Excellent example of this great design Hamble le rice |
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| Laser 140101 Tynemouth |
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List classes of boat for sale |
Laser with a carbon mast?? |
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boatshed 
Far too distracted from work 
Joined: 12 Apr 05 Online Status: Offline Posts: 457 |
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 Topic: Laser with a carbon mast??Posted: 19 Apr 22 at 7:47pm |
To be fair, my OP was comprehensively answered on the first page of this thread. So, drifting off thread was inevitable until there’s no further interest. It’s the way it is. Anyway, ta for your input ;) |
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Steve
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423zero
Really should get out more 
Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3420 |
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Posted: 19 Apr 22 at 8:00pm |
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Demelza, we are lucky on this forum to have some really knowledgeable people, to name a few, jimc, Daniel Holman, Cirrus, Brass, dougaldog, mozzy and dozens of others, I am not one of them, I am more apt to put a joke reply, but, I know enough to recognise that. Apologies for the names I have missed.
Edited by 423zero - 19 Apr 22 at 8:01pm |
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Robert
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Grumpycat
Far too distracted from work
Joined: 29 Sep 20 Online Status: Offline Posts: 497 |
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Posted: 19 Apr 22 at 10:14pm |
Oh dear , we seem a little fractious tonight . As iGRF would say in this situation, either scroll on by or post something interesting yourself.
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423zero
Really should get out more
Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3420 |
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Posted: 20 Apr 22 at 6:23am |
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I think it is griff, one of his pseudonyms.
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Robert
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Demelza
Newbie 
Joined: 01 Aug 21 Online Status: Offline Posts: 31 |
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Posted: 20 Apr 22 at 7:13am |
I don't know who you are addressing this post to, but you want to reread what I wrote, and get your facts correct before falsely accusing me of 'giving instructions on how to cheat' I was pointing out how any unscrupulous person could and still can buy, the cheaper PSC LASER and easily convert it to an ILCA if they were so inclined.
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Grumpycat
Far too distracted from work
Joined: 29 Sep 20 Online Status: Offline Posts: 497 |
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Posted: 20 Apr 22 at 8:49am |
I don’t think so , it’s far too short a post for him .Now we know who he is . It’s the angry LP ( or what ever it’s called these days ) sock puppet who’s first posts were about how to pass off none class legal boats at class events. It all makes sense now .
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423zero
Really should get out more
Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3420 |
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Posted: 20 Apr 22 at 9:01am |
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Demelza, I apologise unreservedly for any distress caused, but please reread my post which you have just quoted, I can't see where it suggests that I thought you were encouraging people to cheat.
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Robert
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Oatsandbeans
Far too distracted from work
Joined: 19 Sep 05 Location: United Kingdom Online Status: Offline Posts: 382 |
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Posted: 20 Apr 22 at 9:41am |
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Whether a composite rig has a better gust response than an Aluminium one is interesting. I talked to a composite engineer on this and he was adamant that if the stiffness and weight is matched ( would need a carbon/glass mix for that) -the gust response would be the same. I am not 100% convinced-it would be interesting to do some testing. If there’s any spar builders out there-I will do the testing if they provide the tubes (I have access to an Instron test frame )
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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: 20 Apr 22 at 10:09am |
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If *all* the mechanical properties are identical then the behaviour surely must be identical. But of course the mechanical properties are anything but identical, unless, like the Laser spar, great care is taken to make them as close as possible. And that's before you get into the possibilities inherent in varying the layup over the length of a carbon spar in a way which is impractical with extruded aluminium.
Edited by JimC - 20 Apr 22 at 10:13am |
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Posted: 20 Apr 22 at 11:11am |
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But *all* the mechanical properties cannot be identical else the composite one would also deform plastically and stay bent. I guess the only ones that need to be matched are weight, EI and outer diameter. And how the properties change with temperature in a range of -10 to +40 should be matched.
Edited by A2Z - 20 Apr 22 at 11:14am |
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