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Widening the weight range.

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iGRF View Drop Down
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    Posted: 19 Nov 14 at 7:48pm
Bell probably went to the wall because all they were offering was dross.

That Little Farr 3.7 is not exactly dross, nor is the Hadron although having studied some of the builds it is trying to stay within the class rules of the Ark.

I wonder if a more modern self assembly pre pack could be constructed, it would remove the biggest cost factor, labour, maybe I shall consider this in my winter project..
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 14 at 8:47pm
There are also a lot of 2ndhand boats around, so if cash poor, that is a cheaper route to ownership than a kit, especially as a mast and sails are so expensive these days.

You only build a kit boat because you want to do carpentry, not because you want to go sailing.
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Post Options Post Options   Quote iiitick Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 14 at 9:31pm
I was thinking.....masts are complicated technical things these days, engineered for bend characteristics, stiffness and all sorts of other stuff. What you need is a long thin blank that can be shaped and machined. So why not go back to wood? I have seen hollow wooden masts made by sticking two hollowed out halves together. You could rout a slot for the bolt rope and keep planing bits off to make it flex where you want it to. It could also have a section like a wing mast. At the end you could skin it in carbon for protection.
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Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 14 at 9:48pm
Someone who shall remain nameless from the UK Cherub fleet did than when competing in Mirrors in the 80's. It was a surprisingly light and stiff gaff (wooden ;-) ) section and measured perfectly.
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 14 at 10:10pm
> remain nameless?

Don't ask, very rocky ownership?

Trouble with wood spars is that they get rather heavy by modern standards
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 14 at 8:37am
Not sure there are many people around with the skills to "tune" a wooden mast these days - certainly not me - and possibly not too many who could successfully glue the 2 halves of a pre made one together. And not cheap, either.
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Post Options Post Options   Quote iiitick Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 14 at 9:44am
It would be an interesting exercise...I suppose that one would decide on a rough? shape, then laminate the two halves up in strips, glue them together, rout the slot, fit the sail, lay the whole lot on its side (see Ian Bruce Byte C2 video), and plane/sand until it achieved the desired performance.  What wood to use? Yew probably. I was never talking of cutting the branches off a tree trunk, a la Nelson!

So, one goes to all this trouble, spends a fortune, fits the mast with it's aerofoil section and different bend characteristics fore and aft, port and starboard...and it's crap! Back to the wood yard boys.....No, not interesting at all. What would be interesting is how it would affect my PY........yawn.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 14 at 11:25am
Originally posted by iiitick

 What wood to use?


Bamboo obviously.. Typical dinghyists never even got the wood right all these years..
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 14 at 11:41am
The British Moth had a bamboo mast in the 30's. And single wire shrouds. People were brave back then...

Masts are traditionally Sitka Spruce.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 14 at 12:07pm
I would have thought something straight grained like poplar.. They use it for snowboards.

Whilst we're on the subject of wood, why is it that the term Gaboon is used for the Ply?

Edited by iGRF - 20 Nov 14 at 12:08pm
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