1 September 2010

Peanut Pram

I've received the plans and manual for the Peanut Pram and I think even I could build this one. It seems to omit many of the parts of other boats I've looked at. It will be interesting to see if those parts are really needed.

The plans came as a PDF file within a few minutes of placing the order. They can be printed out full size, but as all the measurements are pretty clear (in inches) it should be easy enought to plot them out from small prints. The manual seems detailed enough to tell me what to do.
The costs are still significant. Two sheets of 6mm marine ply is well over £100 and epoxy resin and glass fibre tape will add quite a chunk to that. The trick will be to buy all the parts seperately over a period of time and never to add it all up.  Plans are from
http://www.common-sense-boats.com/
My cunning plan is to use the mizzen from Daisy G as the mast and sail for this. The sail areas are about the same, but the mast will be about twice the height. That couldn't possibly cause a problem, could it?
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3 comments:

  1. Steve-the-Wargamer1 September 2010 at 17:31

    I'm no boat builder but I would guess that the important thing is the sail area, rather than the height of the mast???

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  2. Julian1 September 2010 at 20:02

    I think the centre of effort comes into play. It will be a lot higher with a tall narrow sail, which means more leverage, which means more likely to tip over in a gust. But we can take that swim when we come to it. I quite like the idea of unshipping a mast fromone boat and sticking it in another!

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  3. Steve-the-Wargamer1 September 2010 at 21:26

    Hmmm - now I'm no mathematician, far from it but I would have thought that dependant on the height of the mast there might not be much in it... if you assume the height of the mast is the same, then I would have thought a square sail had a higher C of E than a triangular sail... somewhere near the middle on a square sail, but lower on a triangular sail (where the mass is)???? You might be able to work out the maths here:

    http://www.seadercraft.com/sail_crafting.html

    ..which is about model sailing boats but the maths seems credible...

    ..push comes to shove, though - build it anyway - but please blog about it! :o))

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