Hi

"James" skrev i en meddelelse
...
Many classes of boat now have it writted in the rules.. something like...
"no materials of a specific gravity greater than lead..to be used in any
part of the vessel."

A decade ago, somone was banned using Uranium 238 in some american cup .
Wolfram is way to expensive and difficult to cast , being it's melting
temperture round some 3500 deg.C. --------- acturly this is the reson it
was used in light bulbs ,as even white glowing it will not melt.

P.C.
http://home20.inet.tele.dk/h-3d/boxes-4.jpg