[PCW] Air cushion between catamaran hulls

[Bill Fleenor]

Jim,

When air passes through the tunnel it is going through a constriction.  That
will increase the velocity (continuity equation).  Consequently,
conservation of energy requires that increased velocity results in reduced
pressure.  Reduced pressure in the tunnel will tend to pull the hull down
toward the water, although it would be small at these speeds.

Now I haven't had a compressed fluid flow class for 40 years, but the only
limit to this Venturi effect is 'choked flow' which will only occur as the
air flow approaches the speed of sound.  

Can you explain how your concept of lift occurs in violation of the laws of
physics?  Thanks.

Bill Fleenor
Double-Wide