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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List classes of boat for sale |
Plywood Kit Designers |
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KazRob 
Far too distracted from work 
Joined: 22 Oct 16 Location: Scotland Online Status: Offline Posts: 245 |
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 Topic: Plywood Kit DesignersPosted: 28 Jul 20 at 1:28pm |
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I'm not sure about the Phantom but the info I have from Dan Leech is ~£300 for the CAD files, 4 sheets of 18mm (good grade plywood for the jig), 4 sheets of 6mm Gaboon and 4 sheets of 4mm Gaboon marine plywood for the boat. Build time is around 60hours.
So I'm guessing about £1-2k to build the boat ready to fit out
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OK 2249
D-1 138 |
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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: 28 Jul 20 at 2:27pm |
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you forgot the extra gallon or so of epoxy and extra sheets of ply when you somehow manage to screw up the simple putting it together part
 Plus the painting of course.
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Everything I say is my opinion, honest
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Noah
Really should get out more
Joined: 29 Dec 04 Location: United Kingdom Online Status: Offline Posts: 611 |
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Posted: 28 Jul 20 at 3:30pm |
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I may be mistaken but I seem to recall some Merlins being built from a ply / foam / ply sandwich. Whether this would work on bigger panels as it does (unless my memory is playing tricks again) on a clinker plank I don't know. Cost is no doubt higher, too. There's also the rules adherence issue...
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Nick
D-Zero 316 |
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KazRob
Far too distracted from work
Joined: 22 Oct 16 Location: Scotland Online Status: Offline Posts: 245 |
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Posted: 28 Jul 20 at 4:00pm |
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Dave Rose used to build OKs in ply/foam/ply sandwich and they are super stiff by all accounts. They last forever too with a ~30yr old one getting 3rd in the Europeans a few years back I seem to remember.
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OK 2249
D-1 138 |
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Sam.Spoons
Really should get out more
Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3400 |
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Posted: 28 Jul 20 at 4:23pm |
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The OK is 11kg heavier, 42cm shorter and 39cm narrower than a Phantom. It has 3 full size bulkheads dividing the hull into four compartments*, and incidentally adding considerable rigidity and strength. The Phantom OTOH is substantially open with narrow side decks all the way from the mast to the transom which is going to lead to a less rigid structure.
* The basic principle is much the same as a box girder bridge, admittedly the Phantom has it's double bottom to add rigidity but it is never going to be as stiff as the full height box sections of the OK.
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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tink
Really should get out more
Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 789 |
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Posted: 28 Jul 20 at 4:59pm |
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Not sure about 60hrs, watched the video, lots more than 60hrs
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Tink
https://tinkboats.com http://proasail.blogspot.com |
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KazRob
Far too distracted from work
Joined: 22 Oct 16 Location: Scotland Online Status: Offline Posts: 245 |
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Posted: 28 Jul 20 at 5:12pm |
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60hrs is what Dan Leech told me it takes the average builder when I was as asking him about the kit set a few weeks ago. |
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OK 2249
D-1 138 |
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Riv
Far too distracted from work
Joined: 23 Nov 13 Location: South Devon Online Status: Offline Posts: 353 |
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Posted: 28 Jul 20 at 8:01pm |
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So Woodie Phantoms are heavier, less torsionally stiff, may not have compound curves, are using older rig and not double bottomed so may carry water. Given the success of the OK plwood format could these problems be designed out if class rules were relaxed in some areas for wood boats?
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Mistral Div II prototype board, Original Windsurfer, Hornet built'74.
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JimC
Really should get out more
Joined: 17 May 04 Location: United Kingdom Online Status: Online Posts: 6662 |
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Posted: 28 Jul 20 at 9:07pm |
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If plywood OKs are completely equal in performance to foam sandwich boats then that's surprising. Bearing in mind the far greater panel stiffness of foam boats it does seem unlikely. I certainly don't know of another class where its the case.
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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: 28 Jul 20 at 9:12pm |
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Sam Spoons' thoughts could go some way to explaining why,Jim.
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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