CHAPTER VI
BALLAST
CASTING!
DO NOT POUR HOT LEAD IN THE KEEL AS HOT
LEAD FUMES ARE CONSIDERED A HIGH HEALTH HAZARD.!
Moreover, the heat applied to the!
polyester resin by the hot lead will accelerate!
the ageing process of the resin. This would!
cause the polyester to become more brittle and!
what normally takes one hundred years could!
occur in the time it takes to pour the lead in!
the keel.!
LEAD SHOTS OR INGOTS!
You, therefore, have no other alternative!
but to use either lead shots (an expensive!
operation) or lead ingots. Ingots would have to!
be cast. The other possibility is to use steel!
punchings.!
LEAD OR STEEL PUNCHINGS!
We consider lead as the ideal material!
since it is heavier per volume than steel, and!
will keep the centre of gravity as low as!
possible. Even if you use lead, you should try!
to use up the least possible space. Steel!
punchings will almost entirely fill the cavity!
up to the sole, leaving very little bilge space.!
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