50979Re: [bolger] How would Mr Bolger update Cynthia J?
- Oct 6, 2006Graeme,
Doubling or trippling the bottom will only help righting on
a boat that is not flooded. Once the boat is filled, all that plywood
becomes flotation and will have the opposite effect. I think you need
some dense weight down there, lead, steel, at least epoxy filled with
something heavy. Then extra flotation to make sure you don't go right
to the bottom! 8^D
"A house ashore is but a boat, so poorly
built it will not float ---- "
----- Original Message ----
From: graeme19121984 <graeme19121984@...>
Sent: Thursday, October 5, 2006 11:49:25 PM
Subject: [bolger] How would Mr Bolger update Cynthia J?
The designer got around to Otter ll himself, but to my knowledge
hasn't and is, I suppose, unlikely to get around to CynthiaJ ll. So,
guided by study of developments of other PCB&F designs over the
years, how would Cynthia J be improved/modified? Modified, that is,
to be a bit more suited to pursuits other than just pond picnic
daysailing with a gaggle of fun, kids, and family aboard. To really
be self rescueing at the least.
PCB&F wrote, when considering the Beach Cat design, of the issues
some have nowadays with the long footed gaff cat rig. I'd like to
keep the basic long foot rig to try it for fast and weatherly, but
there may be other worthwhile modifications. How about a Camper, or
other tabernacle; or a Wandervogel vang for instance?
Place a stop on the mast to bear its weight at the partner and not
the floor, and so eliminate both the doubling of the bottom member
of frame #1 and the through-hull bolt located there.
Place halyards cleat on the mast and eliminate their compressive
load transference that required the strengthening floor bolt in the
Double or triple plywood layer. This should allow removal of most of
the bottom shoes, and also the irksome inside bottom stiffening
cleats that muck up a lovely flat cuddy floor for lying on.
Sheath bottom in fibreglass before fixing bottom shoes etc.
Will this be stiff enough?
As the flooded boat is reported difficult to get to remain upright,
and impossible to do so with the rig in place, these aspects need
attention. The increased bottom thickness already mentioned will
help put weight where needed, but is it enough? Transferring
flotation situated down low, as per the underseat foam blocks, to a
higher location also should help, but again is it enough?
Also as in the changes from Otter to Otter ll, watertight
compartmentalisation seems required. The cuddy should be very flood
resistant, or watertight. Altering Frame #1 to a watertight bulkhead
will have very little effect on cuddy space. There's still enough to
lie down in. The space in front of the then Bulkhead #1 should
perhaps then be made a free draining flooded well? And perhaps the
large triangular foam block there in the bow could be done away
Bulkhead #3 needs altering by filling in the swinging cuddy doors
and replacing with cuddy access much higher up. Duckboard in the
bulkhead with decktop sliding hatch; or just a deck hatch, perhaps
Box-in the entire space aft of the cockpit seats from floor to rails
and make a huge bouyancy/storage compartment with top hatch access.
It may be more convenient to shorten the seats and box-in aft from
Frame #4 ( how many people are to be carried anyway? You won't be
able to stretch out on the cockpit floor any more, but a great
galley box and cooler could be built into the forward side of that
aft compartment.). Offset the rudder to allow a small outboard
mounted on the transom. Recess the end of the compartment in way of
Fix foam blocks under aft compartment deck, and foam sheet under
fore part of cuddy deck as insurance.
Use two ballast sandbags; one beneath each seat, both shifted to
windward side when under sail.
I'd be inclined to try assymetrics, even though it seems PCB doesn't
think they're needed. They'd be even easier to shape, assuming the
designed ones are not merely flat plates
Leave the outboard at home, take a yuloh and Cynthia J may just be a
very competitive Everglades Challenge short course entrant. What do
What else could be done, or needs doing?
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