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A new class of dinghy?

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Oatsandbeans View Drop Down
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 18 at 7:28pm
ABS and ASA were only used as cosmetic shells for the long fibre reinforced structural laminates in wind surf construction. Making long fibre structural laminates out of thermoplastic resins is very difficult. The aerospace business has spent 30 years on this and still haven't sorted it ( with an unlimited cheque book!) . The wind turbine industry are still trying and have not made any real progress, so I shouldn't hold your breathe that the marine business, with no money behind them, will sort this one out.
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Daniel Holman View Drop Down
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Post Options Post Options   Quote Daniel Holman Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 18 at 7:41pm
Originally posted by turnturtle

I wonder what the rumoured RS Foiler will be made from?


Ach shucks I had some ideas (all concerned with fame, to paraphrase Julian Casablancas) around an affordable foiler oh well!

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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 18 at 9:22pm
Originally posted by Oatsandbeans

ABS and ASA were only used as cosmetic shells for the long fibre reinforced structural laminates in wind surf construction. Making long fibre structural laminates out of thermoplastic resins is very difficult. The aerospace business has spent 30 years on this and still haven't sorted it ( with an unlimited cheque book!) . The wind turbine industry are still trying and have not made any real progress, so I shouldn't hold your breathe that the marine business, with no money behind them, will sort this one out.

Though I wonder if you could create a less expensive composite using an ABS or ASA shell backed up with chopper gunned fibres, or resin infused fibres, or at the extreme pre-preg reinforcements...
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iGRF View Drop Down
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 18 at 9:55pm
Long fibres can be printed... You have to think different when new technology offers options. So, consider ABS printed with fibre support also printed in exact placing with a second gun, think again radically one gun could fire ABS and the other graphene, or titnium even
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Post Options Post Options   Quote turnturtle Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 18 at 6:27am
Originally posted by Daniel Holman


Originally posted by turnturtle

I wonder what the rumoured RS Foiler will be made from?
Ach shucks I had some ideas (all concerned with fame, to paraphrase Julian Casablancas) around an affordable foiler oh well!


Just wait it out.... let them get through the beta phase / early adopters and wait for the price increase. A fully ticked up Aero order form is 8-9 grand these days apparently.
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 18 at 6:29am
Long fibres can be printed- fibres of what? Nothing that has any strength or stiffness. Glass and carbon are the fibres of choice and these will never come out of a 3D printer.

Thermoplastic shells with chopped fibres on the back won't do much for you strength wise. Yes prepreg can be used on the back of a thermoplastic shell. It is what the mouldings on the inside of an airplane are made of ( tedlar + phenolic glass) but no way would a prepreg thermoplastic be cheap but it could make a veryy good boat hull. Epoxy glass and an outer layer of Pvdf /acrylic.

No sorry there is nothing out there waiting to be used to make low cost high performance small boat mouldings that I know of.
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iGRF View Drop Down
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 18 at 11:21am
Originally posted by Oatsandbeans

Long fibres can be printed- fibres of what? Nothing that has any strength or stiffness. Glass and carbon are the fibres of choice and these will never come out of a 3D printer.

.

Really?



Edited by iGRF - 02 Oct 18 at 11:22am
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Oatsandbeans View Drop Down
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 18 at 11:43am
Yes-glass fibres come out of a furnace at 1700 deg.C. Carbon comes out of a series of ovens that take acrylic fiber and sequentially convert it to carbon. Neither of these processes can be adapted to a 3D printing system. They are complex and do not like being started up and stopped. A thermoplastic fibre ( nylon, polyethylene, etc. ) could be used in a 3D printing process but those fibres aren't much good in composites.
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 18 at 12:50pm
Its not very hard to conceive a machine that uses mechanical means to lay up a network of fibres and 3d printing like deposition techniques to put down a matrix. Whether such a thing is practical and offers any advantages over say resin infusion is another matter. But historically advanced sailboat tech has been a spin off from aerospace at least since WW2, so that's going to be the place to go to look for new materials and techniques. If there's nothing on the horizon now there will be sooner or later.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 18 at 12:52pm
They are 3d printing carbon cycle frames, I really don't see why they cannot produce something as simple and so much lower tech as a dinghy hull. You really need to forget what you think you know and open your mind, you'd be really surprised by what's out there these days.

This coming from a discussion where some think the clunkiest, oldest, blackest technology rotomoulding is acceptable for a performance racing dinghy.
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