When I read your question a visual popped into my mind immediately. Every spring we see the appearance of an interesting species. They are only visible several times a year, they come out, circle the break water a couple times and head back to their nest. The text books say they can fly, but more often you see them running hard with their nose in the air, puffing away, lots of froth in their wake, but rarely do they actually take flight. I don't know if it's for a lack of might, a lack of will, moss on their feet, or a belly too full from spending so much time in their nest. But I hear they expend so much energy in their failed attempt that they must spend many weeks in the nest working for the man to afford enough feed to fuel their next effort. We call these creatures the SeaRays. I suspect the set up you inquire about would have a similar behavior. ----- Original Message ---- From: Roger Jacob <rjacob@pvp.com.br> To: power-catamaran@lists.samurai.com Sent: Thursday, January 18, 2007 7:11:43 AM Subject: [PCW] planning hull at displacement speed Dear all, What would be the impact of a projected planning cat hull if we set up engines for lower speeds? Is there loss of efficiency? Confort? Any other points? Roger _______________________________________________ Power-Catamaran Mailing List