Stein,

There is no dynamic lift element in the drag prediction used by Michlet, so there can be no account of planing, or "semi-planing". I usually post on Boatdesign.net but have stayed well away from that thread!

Wouter,

I intend to answer your questions more fully but do not have the time to do all the runs requested just yet. In the mean time here is the total drag plot for hull1 5m hull2 5.5m and hull3 6m hulls at 260kg (110kg boat + 150kg crew).

[Linked Image]

Gareth
www.foruhulls.com