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Harrigami's progress 2
Newsletter from Rob Denney, Oct-2001
| G'day, Photos included of harrigami nearly finished. I am still sorting out the trailer, but it looks as if the folding system will work pretty well. Plan is to go sailing in a week or so, then back into the shed to put a table, seats, galley etc in the windward hull. 449 hours to this stage, including mistakes, testing, thinking time and cutting and shutting to lower the cockpit floor, excluding a few weeks of messing about with the trailer, altering the boom, mast and rudders from harry and playing with the folding system. Materials, including consumables and the trailer come to $5,435. This includes some bargains, which may or may not be repeatable. In the unlikely event that I lessons learnt from this one and applied them to building another one, I would expect to have a much better job in under 300 hours. Click for a fairly complete breakdown of the costs, weights, and time for the construction of 'harrigami'. |
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 click to enlarge |
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| The space between the beams
and hulls will be trampoline deck. Since the last photos were taken,
I have lowered the cockpit floor and bunk area between the beams on
the windward (short high fat) hull. The floor is now level with the
bottom of the beams rather than the top. This gives more sit up space
inside, more shelter in the cockpit, ergonomically better seats and
a positive location for the beams, at the expense of lowering the
tramp clearance from 900mm (3') to 700mm/28". Thanks to Rob desRoches
and Han Bijlard for pointing out the advantages of this. |
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 click to enlarge Windward side of windward hull |
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The beams are joined at the colour change. The end closest to the camera has 4 angle pieces of f/glass clamped across the join and the other has a ply/glass box which encloses the join. Both are tied, very tightly, with spectra string. Both work, but the angle pieces are more elegant and lighter. The test was to jack the boat up under each beam join. Movement of the hulls was about 30 mms/1.5". No idea if this is a fair test, or a useful result, but it will do till we go sailing. The webbing at the windward hull end of the beams is a part of the folding system. They may or may not be structural in certain conditions, but are pretty strong just in case. |
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Height is 1.95m (6'4"), length 8m (27') Will draw
about 300mm/1' at half a tonne load. Will look better with a window
or two. Anyone who feels the urge to sketch some possible window
shapes, and send them to me is welcome to try. The next one will
be 100mm/4" lower which will also help.
Thanks to Ted Lamont for the photos. |
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To read more About Harrigami: Harrigami is a folding proa based on what I learnt with Harry (Harry + folding = Harrigami), my 12m proa... |
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| back to Harrigami's progress 1 | ||
