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V3- Early sketches

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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 Topic: V3- Early sketches
    Posted: 05 Dec 14 at 4:23pm
We're ahead of you on the inflatable sup, variable rockers and all sorts, there have been boats built using the technology. I'm not quite grasping your concept of the space frame to heel to weather how is that different from what I'm attempting? Other than using metal instead of a wood deck to secure the pivot point? I may yet be forced to do that a la EPS three point shroud system if the wood option isn't practical.

PS I never believed Peter Chilvers, not from that day to this.
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 4:43pm
I can see your idea, just think that a space frame might prove easier to identify and isolate the loads, though I now note that you are trying to achieve this with an unstayed rig.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 4:56pm
Are you talking about the sort of thing they have in an Iso/Buzz is it?
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 5:29pm
Can't quite figure out it this is what you already have planned for the rig, but if it an pivot in all directions at deck level, then at the foot be free floating, attached to3 6:1 pully systems which can make the mast go to any angle fore and aft and sideways then you might be able to have a rig that immitates a windsurfer one - but why not go windsurfing?

Another rig that was tried way back when on C class cats was one of a wing sat on top a short mast (so the wing could go vertical on either side, but be canted too. Didn't work at the time, but an injecton of modern materials and a fresh approach might do the trick. Maybe you end up with a tethered, pivoting kite?
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Post Options Post Options   Quote blaze720 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 6:05pm
I may yet be forced to do that a la EPS three point shroud system if the wood option isn't practical.

Just use yor current EPS rig .... its there and cheap enough.   

Do you remember  Mr Shaun Cox's Div 1 boards many years ago ( he was an ex- European Moth Champion I think and founded Demon Sails) - twin bows blending into a common flat aft section for offwind.  You sailed it upwind on an angle so that one bow or other was engaged on either tack..... and it was really was very competitive against anythign around and looked easy to manage as well  - he got the rocker absolutely right to make the concept work.  A part tunnel hull concept but this one really was fast compared against everything around it .... 

Might be an alternative starting point.

Mike L.

     


Edited by blaze720 - 05 Dec 14 at 6:07pm
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Post Options Post Options   Quote RS400atC Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 6:51pm
Graeme,
What exactly is the object of this?
I don't mean that in a negative way, or not as much as it might sound, but I'm curious as to what exactly the goal is and what you have adopted as constraints?
What will your measure of success be?

E.g., you're planning to sail on a pond?
Are we looking for fast? easy to sail? cope with lots of wind? cope with waves? go well in the light stuff?
Cheap to build?
Nice to look at?
Marketable?
Weight carrier? for lightwieghts? equal performance across weight range?
Different for the hell of it?
kites?
wires?

You seem to have some idea about a hybrid cat-monohull, how about starting with a cat and designing out all the bad features of cats? (if that's possble?)(how do you design out 'will be bought by cat sailors'?)

Regarding construction, I'm inclined to suggest forget the wood, build a plug and mould it in foam sandwich.

good luck anyway,
IMHO, nothing is going to be great that has not worked before unless it takes advantage of the fact we can make stuff lighter.
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Post Options Post Options   Quote sargesail Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 7:06pm
Originally posted by RS400atC




You seem to have some idea about a hybrid cat-monohull, how about starting with a cat and designing out all the bad features of cats? (if that's possble?)(how do you design out 'will be bought by cat sailors'?)


I expect you design out 'will be bought by cat sailors' by making a hybrid cat-monohull!

iGRF - Best of luck!
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Post Options Post Options   Quote Null Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 7:31pm
Well done frame for thinking about taking up a new project.  I think it's great that you get out there and actually put your money where your mouth Is! I really enjoyed how you pushed the boundaries with the vtwin.  Even if it didn't work as planned.

Looking forward to watching this thread develop.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 8:14pm
Originally posted by RS400atC

Graeme,What exactly is the object of this?


To design out all the faults I find with other boats.

As I said back there, I don't like falling in the water, so stop all that.

I want to go up wind high and fast and I want to go offwind and downwind without all that rock n rolling.

I want to race on the lake against Lasers and stuff, yet still turn to on the sea and be in with a shout against Contenders, in brief I want everything in one boat.

Every boat I've sailed, including those two new Wunderkind *eros have issues I don't like.

So like the saying goes, if you want something doing, do it yourself.

My measure of success will be if I can *win races on the sea and on the lake.


*Over the water that is, don't even talk about handicap, which if my spreadsheet is to be believed will turn in around 1040-50 given I'm targeting a sail around 8.5 and a waterline length around 4.25.

oh and all this as well. E.g., you're planning to sail on a pond?
Are we looking for fast? easy to sail? cope with lots of wind? cope with waves? go well in the light stuff?
Cheap to build?
Nice to look at?
Marketable?
Weight carrier?

Not sure about the marketable, it's probably a bit too off the wall for the conservative world that is the 'dinghy market', it's pure self indulgence without the need to take it to market.

Edited by iGRF - 05 Dec 14 at 8:19pm
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Post Options Post Options   Quote Jeepers Quote  Post ReplyReply Direct Link To This Post Posted: 05 Dec 14 at 8:29pm
Well, it started off looking a bit relevant...

http://glen-l.com/picboards/picboard10/pic554c.html

...end result...well at least you could hand out cucumber sandwiches and have a cup of tea whilst the Lasers and Miracles sailed by!
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