I was looking at the problem for an unstayed mast and I thought of
having a ring that can be tightened- a bit like an oversisze hose
clamp- that is pinned to the deck of the boat. This way you lift the
mast till it is just clear of the bearings, tighten the ring and the
base is secured while you lay the mast down.
I was looking at making the ring out of PVC pipe, cut, with the
ends of the cut heated and bent to take the cam lock pin. Tie a
couple of strings to the mast as temporary stays to keep it under
control
regards,
robert
--- In harryproa@..., Doug Haines <doha720@y...> wrote:
>
> hI rOB,
>
> Yeah I'd like some to make the wing masts Elementarry. Probably
limit the quantity to a price limit say$200 that might make a fair
bit of the masts. I think I might try foam sandwich - the main thing
for me is unshipping the masts o get under Mandurah, Canning,
Causeway bridges, mostly Mandurah as I have a home here. Otherwise I
would not bother about carbon and foam, as the boat is getting pretty
heavy and more stable for cruising all the time. I don't think it is
to easy to lift out a glass/kiri mast plus boom, while standing I
gueass on the beam and LW hull, so it might just be better to avoid
any bridge under 6m.
> Comparing the elementarry masts to the aluminium 6oddm mast on
the Hartley16' and it is lifted up vertically off a pin and then
layed out along the cabintop, and is a pretty slim section but would
the carbon mast evenn be as light as that, what with the boom and
this wing shape I got sent from Myriam and Youri?
> The whole boat is quite heavy such as the beams and platform are
now joined to the lw hull and lifting the beams up and over to get at
the under side is quite an effort. The effect of a lighter mast is
not going to effect the sailing speeds much will it?
>
> Rain on Monday maybe too.
> When was Carbon expected to arrive anyway, cause I'll start the
masts in about 2 weeks.
>
> Doug
>
> I've made every thing else already and it is all OK with glass.
>
>
>
> Rob Denney <proa@i...> wrote:
> G'day,
>
> I have been offered some surplus to requirements standard modulus
carbon uni.
>
> 300 gsm (9 ounce) 1.22m/48" wide is $AUS75/kg, $AUS22.50 per sq m
which is near enough $US25.60/pound, $US1.57 per sq'.
>
> 200 gsm (6 ounce) and 150 gsm (4 ounce) are 5 and 10% dearer.
>
> Less than a roll, add 20%. Local duties and taxes will be
extra.
>
> 10% off these prices for Harryproa list members.
>
> No idea how these prices compare in the USA or elsewhere, but
they are about half what we pay in Australia, when it is available,
which at present it is not.
>
> Anyone interested, please let me know. I have to place an order
very soon or miss out.
>
> regards,
>
> Rob
>
>
>
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