From: "Jim Russell" <jimrussel@sympatico.ca> To: "'Power Catamaran List'" <power-catamaran@lists.samurai.com> Subject: RE: [PCW] Air cushion between catamaran hulls Date: Wed, 4 Mar 2009 14:33:18 -0500 There will be aerodynamic advantage at lower velocities. The biggest contribution of the aero Lift is that it comes with insignificant drag penalties and reduces the hydrodynamic Lift AND drag required to support the hull. Overall any aero Lift that is supplied results in significantly reduced hydrodynamic drag due to reduced wetted surface....net advantage! Our "Tunnel Boat Design Software" resolves the complex dynamic balance of aero and hydrodynamic forces acting at any velocity...it's complicated, but even lower velocities see some advantages. Jim Russell, P.Eng. AeroMarine Research AeroMarine Research http://www.aeromarineresearch.com -- The reason your post was delayed is that you're are not subscribed to Power Catamaran List with the email address you're using above. To subscribe, go to <http://www.trawlersandtrawlering.com/forums/powercatamaranli.html> and you're posts will go directly to the list without delay.