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Making the boat heavy Ballast - Lest Pour un bateau lourd
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The
Pepe Berrou is a heavy
boat with a 40% lead to displacement ratio, that means a lot of
ballast. We have been collecting lead for several years and still
could take more, ideally we would reach 10 tons. In the mean time we
want to concentrate on the integral ballast and will not rush about
trim ballast, which could eventually be steel and has dedicated space
planned ahead. On the plating
page I have already described our first go at lead melting for
this boat (similar to our lead melting experience for our previous
boat). That first load was all piece meal bought from metal
recyclers. We painfully melted our 4600lbs on a propane
burner. The second keel came from a friend, Bernard. Bernard bought a hurricane boat from Florida to recover parts. By selling all the valuable parts of the boat he figured he would get the engine for free. We bought the keel from him....thanks Bernard, that was a helpful couple tons. We than stared at our lead for a while, wondering, how, first, we were going to melt those chunks and then how we were going to place all that ballast in the boat. I am now happy to announce that we are done banging our heads on the walls over these problems. I spent many days making 24 "bins" shaped to be contained in 4 integral tanks that will be welded shut. It has been a lot of work but I expect the result to be very tidy. To melt the
keels, our bathroom
renovation and Bud Mackintosh brought us the answer. In his book,
Mackintosh has a drawing of some guys melting lead in a tub over a wood
burning fire. We were very unsure but figured we should give it a
try.This
actually worked much better and faster than we expected. We started
by getting a puddle going with some smaller chunks and where stunned
how quick the lead started to melt. Our neighbor, Yann, came with
his big green tractor to place the 1 ton keel down in the tub. Hum...
didn't fit....Mark got to try the chainsaw in the lead keel. Yes,
Mark can now fully acclaim his...arrg... male chainsaw talents
:) Note the
pictures of the fiberglass top
and the keel bolts. Each bin, weighing between 250 and 350 lbs is hoisted back up and down in the boat at it's spot. Some may
wonder why we end up having
ballast laid in the bottom of the hull as we do, why isn't all
contained in the keel as most sail boats our days. Quick awnser is:
that's the way it is! A little better said: The keel of the boat is not
really a keel, more of a back bone. The fishing Tuna dundees would
ballast by filling the bottom of the boat with rocks (and eventually
with fish). We thought we could do a little better than rocks but still
had to load the bottom of the boat. Unlike the old wooden boats we
could use the box section of the back bone to carry some ballast.
Compared to old boats, that has the obvious advantage of lowering our
center of gravity, but we didn't have enough well positionned (center of boyancy) volume to carry
all the necessary ballast to reach our diplacement. It was necessary to
carry some ballast in the belly of the beast. So be it. It only has
made lead containement a bit more work than the common modern steel
vessel.
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