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These are Jarek's comments:
As I wrote before, the kayak was going to look like Cirrus from
oneoceankayaks.com. So I moved the pictures of the Cirrus to the
AutoCAD and treated it as a base and I made some changes: It is a bit
shorter than Cirrus LT- 4,78m, it is wider- 0,59m, and the shape of
the deck is quite different as you can see. I also put two
cross-sections: behind beckrest and in front of feet. After those
changes I called the model of a kayak "by jarcion" :-)
I made some changes according to your proces. First of all I had the
cockpit and hatches cut at panels, before stitching. I just have
them ready after unrolling the side and front views of the kayak in
Auto CAD. And the second main change, sequent from the first one, is,
that I was able to stitch all 6 panels before glueing. As I did.
Then I had some problems with aminas during laminating and bubbles at
the edges of course. I waste a lot of time for this... Today I cannot
say how many hours I spend on building ( I will have to add them
together), but it was about 3 weeks of working. And the cost...well it
was a bit bigger than I thought (22% VAT- not everybody gives brutto
price), but it is still half the price of the cheapest glass-polyester
(but not sea) kayaks on the market.
I used 3 sheets of 4mm (3,8mm indeed) birch-tree plywood, almost 2kgs
of epoxy for glueing and cocpit laminating (it dries much faster) and
almost 5 kgs of another type of epoxy for laminating and 10x1,1m of
200grams glass-cloth. As a filler for glueing I used sawdust. And some
copper wire. I paint it with transparent urethan varnish with UV
filter for yachts. I can see some imperfections in shape (I trusted to
much to the 1:1 prints, and I could see them (the mistakes)after
glueing and cutting the wires :-( ). Now, I also know, where I lost a
lot of time. Next time it's gonna be better! Now I have to make some
decks for hatchways.
On Sunday I could compare my construction with another plywood kayak.
Here is a company (www.hobbo.net) in Poland that produces kayaks as a
kits for do-it-yourself. And they came with one of their product. It
was wider, longer and much havier than mine. And more comfortable. But
everybody (including "competition") who paddle both boats agrees
that nautic propeities such as speed and acceleration are better in my
kayak. It was very nice to hear that ;-) Stability? I would say it is
good and I so far I had no problem with that. It is hard for steering
or I can say it keeps the direction very good...depends, but for lakes
and sea it is an advantage, isn't it?
I feel honoured, that you will put pictures of my kayak at your
webpage. And the text: well, about the kayak I think you can write a
few words based on this e-mail, but I would like to ask you to include
this: "Many thanks for my Wife and Daughter for their patience and
indulgence, for John Coppens for his webpage and advices, and for
others who helped me with this project", OK? |