Building methods
Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13429
Printed Date: 29 Jun 25 at 12:51am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: Building methods
Posted By: iGRF
Subject: Building methods
Date Posted: 07 Oct 19 at 12:54pm
|
Having not totally kicked the idea of self build into touch, I wondered what the issues might be instead of using ply, but using that methodology, I substituted carbon and carbon foam sheet, could it be a 'thing'?
What would my issues be? Say for example I were to stretch a 3.7 plan out to 4.20 https://www.easycomposites.co.uk/#!/cured-carbon-fibre-products/carbon-fibre-cored-panel/Foam-Cored-Carbon-Fibre-Panel.html" rel="nofollow - Using this sort of stuff for instance.? ------------- https://www.corekite.co.uk/snow-accessories-11-c.asp" rel="nofollow - Snow Equipment Deals https://www.corekite.co.uk" rel="nofollow - New Core Kite website |
Replies:
Posted By: JimC
Date Posted: 07 Oct 19 at 1:00pm
|
Clive Everest built a sort of stitch and glue foam sandwich Cherub.
|
Posted By: jeffers
Date Posted: 07 Oct 19 at 1:23pm
|
So just like a Foam Sandwich hull then... There was a guy in Paignton built a Fireball by making his own foam cored panels and a chap on FB built a Merlin using a similar method. ------------- Paul ---------------------- D-Zero GBR 74 |
Posted By: 423zero
Date Posted: 07 Oct 19 at 1:25pm
|
You can get brilliant white gel coat finished sheets of grp, perhaps similar to above post, stitch and glue. ------------- Robert |
Posted By: iGRF
Date Posted: 07 Oct 19 at 4:38pm
|
So, it's viable, been done before, any youtubey stuff about? ------------- https://www.corekite.co.uk/snow-accessories-11-c.asp" rel="nofollow - Snow Equipment Deals https://www.corekite.co.uk" rel="nofollow - New Core Kite website |
Posted By: davidyacht
Date Posted: 07 Oct 19 at 5:45pm
|
Not sure about gelcoat, will crack as soon as the panel is bent. But Kevin Gosling has built a few Solos using foam cored ply. ------------- Happily living in the past |
Posted By: tink
Date Posted: 07 Oct 19 at 6:49pm
|
100% read the OP about no ply but back in 87 speed sailing week in Weymouth I went to a talk by Dave Culp, USA kite sailing pioneer. He said he always built his boat and parts as a disposable. The ideology was that if you had too much (time/cost) invested in any part of the boat you wouldn’t take risks and if it didn’t work you would be tempted to keep it rather than move on. So for me ply is the cheapest and quickest - depending on shape obviously. ------------- Tink https://tinkboats.com http://proasail.blogspot.com |
Posted By: KazRob
Date Posted: 07 Oct 19 at 7:22pm
|
Just go for a epoxy ply/foam/ply sandwich. Super stiff and stays that way for decades. Dave Rose used to build his OKs that way and 30+ years later they’re just as fast as anything around now in the right hands. I guess you could build the panels on the bench and then put them together in a jig. ------------- OK 2249 D-1 138 |
Posted By: craiggo
Date Posted: 07 Oct 19 at 7:53pm
|
Clive built his Cherub using fibrefusion water jet cut carbon/foam/carbon panels.
It's a great way of building, you just have to be careful twisting the panels to form the correct curvature near the bow. ------------- OK 2129 RS200 411 |
Posted By: Rupert
Date Posted: 07 Oct 19 at 8:05pm
|
Cardboard. Start with a cornflake box model of what you have in mind. Then make a dozen more until you get the shape you want.
------------- Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686 |
Posted By: tink
Date Posted: 07 Oct 19 at 8:10pm
Plasticard from model shops, can make the boat float and ballast down with plasticine. Draw it in delft ship and it will give you the panels etc
 ------------- Tink https://tinkboats.com http://proasail.blogspot.com |
Posted By: john80
Date Posted: 07 Oct 19 at 8:11pm
| You can use the diab strip planking method. I am using this on a yacht build and it works off a basic male mould. |
Posted By: Daniel Holman
Date Posted: 07 Oct 19 at 8:37pm
|
Any boat that can be built from sheet ply can be built from foam sandwich without a mould, just some rudimentary jigs.
A phantom for instance could be built without a mould in foam sandwich. You’d want to use thin core like 5mm else it would be too stiff, and you may want to use foam only laminated on one side for the complex curved areas. Farr 3.7 prob too. So you could have anything with that single chine architecture for minimal investment. Still needs a lot of skill and time tho. |
Posted By: Rupert
Date Posted: 07 Oct 19 at 8:47pm
I'd forgotten this stuff! For years as a kid I'd make toy sailing boats from it, if I wanted something lighter than carving balsa wood. It's still available, then? You could get different thicknesses, too. ------------- Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686 |
Posted By: sargesail
Date Posted: 07 Oct 19 at 10:13pm
Wow that was quick IGRF |
Posted By: 423zero
Date Posted: 08 Oct 19 at 12:12am
Wow, no sails, must be Lee bowing it.  ------------- Robert |
Posted By: Rupert
Date Posted: 08 Oct 19 at 6:39am
Just ferry gliding! ------------- Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686 |
Posted By: tink
Date Posted: 08 Oct 19 at 7:38am
I went to a good model shop. But sure the net has some. The design above was a light weight car top touring boat with oars. Hence stern design, did have a sail also. Eventually ended up a Canoe which was modelled the same way and built. ------------- Tink https://tinkboats.com http://proasail.blogspot.com |
Posted By: iGRF
Date Posted: 08 Oct 19 at 9:46am
|
I'm minded that making models boats is a bit Doug Lord isn't it?
However I have fashioned a couple of paper proof of concept 'things', which I'm not sure even admitting to is cool. ------------- https://www.corekite.co.uk/snow-accessories-11-c.asp" rel="nofollow - Snow Equipment Deals https://www.corekite.co.uk" rel="nofollow - New Core Kite website |
Posted By: tink
Date Posted: 08 Oct 19 at 10:04am
It led to a boat that was made, there are many other characteristics that make you Doug Lord other than modelling ------------- Tink https://tinkboats.com http://proasail.blogspot.com |
Posted By: Granite
Date Posted: 08 Oct 19 at 11:38am
|
I built a Cherub to Clive Everest's design and it was built from a mix of water jet cut prepreg carbon panels and waterjet cut foam panels. There is a thread with loads of pictures on the Cherub forum. http://www.uk-cherub.org/forum/index.php/topic,2325.0.html" rel="nofollow - http://www.uk-cherub.org/forum/index.php/topic,2325.0.html The hull plug was made with lots of small chines all CNC cut out and fitted onto matched frames. For the hull a foam sheet was cut into shapes that fit all the flat chines on the plug so lots and lots of long triangles. The inner skin was laminated, then foam attached. The corners were sanded back to give a smooth outside shape and the outer skin laminated. All the interior frames the spine and the deck sections were waterjet cut prepreg foam carbon panels. There was a bit of bending and twisting to get them to fit but they are generally quite flat. If you were to make the whole thing out of prepreg panels then I think the amount of curvature in something like a fireball hull or some sort of streached 3.7 hull would probably be feasible but I would want to put some thought into how to hold the panels to shape while the taped seams dried. The kind of wire stitching you would do with a ply stitch and glue would probably not work ------------- If it doesn't break it's too heavy; if it does it wasn't built right |
Posted By: NicolaJayne
Date Posted: 08 Oct 19 at 3:50pm
can't beat a bit of cardboard aided design <make the noise ! >
|
Posted By: Riv
Date Posted: 09 Oct 19 at 7:36am
|
Love the CAD cardboard aided design. Best smile this morning ------------- Mistral Div II prototype board, Original Windsurfer, Hornet built'74. |
Posted By: NicolaJayne
Date Posted: 10 Oct 19 at 5:26pm
you'll love 'bad obsession motorsports' on you tube ... and their mash up of a classic min and celica Gt4 |
Posted By: Riv
Date Posted: 10 Oct 19 at 5:54pm
|
Loved it, thanks I've subscibed
------------- Mistral Div II prototype board, Original Windsurfer, Hornet built'74. |