[Land-speed] Water jet cutter

[John Burk]

Stopped in to see my friend Bob today . He showed me some things he's made
recently with his water jet cutter . It makes ready to tap holes in 1/2"
aluminum and cuts hard material up to rockwell 64C . . It has 2 hydraulically
driven pistons that step way down in diameter to pump the water . The water
passes through a tiny hole in a ruby jet at supersonic speed into a chamber
filled with abrasive and out another hole to do the cutting . The work piece
is slightly under the surface of a water tank with 3 ft of water below to
decelerate the abrasive . He keeps asking what  he can make for my streamliner
with it . I wouldn't be surprised if it could make a  crankshaft ready to
grind .