[quote=Jake]Because us Tornado sailors are always chasing the ulitmate performance, we keep our mast interiors at full vacuum...no need to ship those extra gas molecules around the race course!

Why not inflate them with helium for a little extra lift?
Nope...Myth Busters tested that...Helium or Hydrogen filled football doesn't throw any farther.
Adding anything with mass (ie any type of gas) will increase the mass (therefore density) of the mast compared to having the mast evacuated.