All:Jeez, our first sail on our H23 and the GPS indicated 5.8 knots with jib and main---I thought we were really doing great! My 8.5 year daughter was stressed when she looked through the cabin window and saw water. (It's okay, she's a thrill junkie now and sleeps below if the speed is below 4 knots.)The hull speed for the H23 is 5.9 knots assuming the hull is a displacement design, which it is isn't. So called semi-displacement hulls will plane. The hull of the H23 is more powerboat than displacement. I have planed our wing keel boat under 50% power with a 9.9 hp long shaft at 6.5 knots GPS under bare poles. The boat had overtaken its bow wave and produced the classic powerboat twin wave wake so I knew the boat was definitely planing. We were headlong into a 20 knot breeze (which is why we were motoring) so I guess surface current at 2.0 knots for a boat speed relative to water of 8.5 knots. One curious powerboater drew up along sides after approach from astern and just shook his head---guess he wasn't used to seeing sailboats up on plane while running an outboard auxiliary. I wonder what it would take to get the boat hydroplaning on the winglets? ;-)Ten more hours of motor break-in and a new strenghten outboard motor bracket and we'll see what 100% throttle does!