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Granite View Drop Down
Far too distracted from work
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Joined: 12 May 04
Location: Scotland
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Posts: 467
Post Options Post Options   Quote Granite Quote  Post ReplyReply Direct Link To This Post 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

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
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NicolaJayne View Drop Down
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Joined: 01 Mar 19
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Post Options Post Options   Quote NicolaJayne Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct 19 at 3:50pm
Originally posted by Rupert

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.

can't beat a bit of cardboard aided  design 


<make the noise ! >
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Riv View Drop Down
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Joined: 23 Nov 13
Location: South Devon
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Post Options Post Options   Quote Riv Quote  Post ReplyReply Direct Link To This Post Posted: 09 Oct 19 at 7:36am
Love the CAD cardboard aided design. Best smile this morning
Mistral Div II prototype board, Original Windsurfer, Alpha 220PR
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NicolaJayne View Drop Down
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Post Options Post Options   Quote NicolaJayne Quote  Post ReplyReply Direct Link To This Post Posted: 10 Oct 19 at 5:26pm
Originally posted by Riv

Love the CAD cardboard aided design. Best smile this morning

you'll love 'bad obsession motorsports'  on you tube ...  and their  mash up of a classic min and celica Gt4

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Riv View Drop Down
Far too distracted from work
Far too distracted from work


Joined: 23 Nov 13
Location: South Devon
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Post Options Post Options   Quote Riv Quote  Post ReplyReply Direct Link To This Post Posted: 10 Oct 19 at 5:54pm
Loved it, thanks I've subscibed
Mistral Div II prototype board, Original Windsurfer, Alpha 220PR
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