Laser 140101 Tynemouth |
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Laser 28 - Excellent example of this great design Hamble le rice |
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Laser 161752 Tynemouth |
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
![]() ![]() ![]() ![]() Posted: 26 Nov 14 at 3:27pm |
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I guess I'll need a plastic hammer.
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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Plastic, Modern composite nails, nails that melt when you heat them up, nails that can be sanded away, I think they're a blinding idea, I read somewhere in all the blurb that they are used for modern boat building.
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ChrisB14 ![]() Posting king ![]() Joined: 29 Oct 13 Location: London Online Status: Offline Posts: 101 |
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Glue, glue, glue! Epoxy is a godsend (I repeat myself). It makes boat building much easier than it would be if relying on more classic glues and nails/screw.
Yes, we are speaking of a two pack epoxy. For wooden boat builds West 105/205, Gurit SP106 or Sicomin 5550 are all very well suited. You will also want some fillers to stir in (wood fibers, etc.). Nails are just so ... how do I best say this? Century before last :)
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B14 GBR 748 Bullet B
In build: Farr 3.7 GBR 410 (both sail number and the current number of loose parts) |
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Medway Maniac ![]() Really should get out more ![]() ![]() Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
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My presumption is that by tapering the hull upwardly and rounding the top you enable it to emerge easily upwards out of a wave it has ploughed into (the way a normal bow cuts down into a wive instead of lifting the bow, unnecessarily pitching the boat). The reverse bow simply results from that upward taper of the beam. There may be more to it than that, but I can't see what.
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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Oh another thing, that glue you speak of is that a two pack epoxy or something else?
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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There are also proper nails made of plastic, one thing I can wield is a hammer, nod your head and I'll hit it..
![]() But seriously I was thinking get it assembled then epoxy glass the leaky bits and the bits you kind of really want to stay stuck together and epoxy varnish the rest. It's a bit of a weird shape that my main worry would be a fore and aft total snap in two failure, it wouldn't be the first time I built a boat which fell in two the moment I put it on the plane, being the first johnny to try and laminate kevlar we found out it's lack of resin absorption properties the hard way.. ![]() Edited by iGRF - 26 Nov 14 at 3:13pm |
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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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I dunno about that: staples are mainly to hold everything in place while the glue sets.
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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Got it Good tip that, who wants to mess about with glue when a power stapler with light none rust nails would do, this is good, I'm feeling a trip to the man cave tonight to work out layout. Edited by iGRF - 26 Nov 14 at 3:00pm |
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Do Different ![]() Really should get out more ![]() Joined: 26 Jan 12 Location: North Online Status: Offline Posts: 1312 |
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Thinking on some more: you are never going to have the mass/energy/inertia whatever be truly wave piercing on a lightweight dinghy are you? So are we really talking about offering least resistance on that initial contact?
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Do Different ![]() Really should get out more ![]() Joined: 26 Jan 12 Location: North Online Status: Offline Posts: 1312 |
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What's the theory on reverse stems / ware piercing bows?
I can see straight stems maxing WLL to LOA and I guess I can see how the fine, very deep vertical bows on Cats work, preventing nose diving like the old Tornado and offering some resistance to leeway. What is the benefit of coming back past vertical, weight saving for max WLL seems possible but minimal to me. Is going through a wave thought to use less energy than lifting the boat and crew weight over? When you go through don't you increase wetted area and displace more water than going over, chucking spray up and around must be wasted energy as well. Not arguing, just asking. |
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