A concept for a retiring sailor who wanted a very fuel-efficient power boat and felt no need to travel faster than he did when sailing. At a hull speed of 10 knots, this round-bilged, narrow hull would be very efficient and sea-kindly, needing only a 53 hp (40 kW) diesel to keep it burbling along. A large, slow moving controllable pitch propeller allows the power plant to be fine tuned to conditions, getting the most out of the small engine. Paravanes on outriggers provide roll-damping underway and at anchor.


Overall Length (Hull)12.2 m [40’]
Waterline Length11.9 m [39’]
Beam Over All (Hull)3.05 m [10’]
Draft0.88 m [2.9’]
Displacement, Lightship2,570 kg [5,666 lb]
Displacement to DLWL5,030 kg [11,089 lb]
Water Ballast
620 kg [1,366 lb]
Engine39.6 kW [53 hp]
Reduction Gear3.03:1
Propeller738 mm DIA. [29″] CP
Cruising Speed
10 kts
Range at Cruising Speed1,000 nm
Fuel567 L [150 gal]
Fresh Water350 L [92 gal]
Sewage175 L [46 gal]