Page 46: of Marine News Magazine (July 2012)

close contact with the vessel?s operator to gain feedback.?So far, Croft reports that ?it?s doing very well. With three engines in each hull [counting gensets] the maintenance is a little higher than if you run single engines. Lots of oil and oil  lters, but the fuel economy appears to be meeting expectations,? he said, although that statistical data was not available in time for this edition of MarineNews . Croft said the Sea Scout has demonstrated a maximum speed of 26 knots (light ship), and, he adds, ?We can hit 24 knots with a full load any day of the week.? Cruising speed is about 17 to 20 knots depending on the sea state and load. Croft reports a fuel burn rate on the C18?s alone at a speed of  ve to six knots is about four to  ve gallons per hour. Following the completion of the Sea Scout, some other vessel operators have expressed interest in how the quad propeller propulsion system might bene t their  eets. ?Other typical examples which would bene t from this design are windfarm support vessels which have to travel out to the windfarm at high speed, but then travel slowly between the wind turbines for many hours while loading and of oading personnel and equipment. Coastal patrol vessels which loiter for many hours, but need the capability of high speed for interception, are also prime candidates for the design,? said de Waal. ?There is probably no limit on how large a vessel the propulsion design can be applied to, but from a physical space point of view it would probably not be practical in boats smaller than 65-ft.??I think it is early days yet,? said de Waal, ?but I expect signi cant interest once more information on the operation of the vessel becomes public.?All American Marine has reported several inquiries about the design from survey companies around the world. ?We have been building quad engine/ mmÜÜWW==EEPPPPTTFFOOPPTTJJRRMMNNNN ccññWW==EEPPPPTTFF==UUPPTTJJTTTTUURRbbWW==ÜÜÉÉ~~ÇÇÑÑääììëëÜÜÉÉêê]]~~ÜÜÉÉ~~ÇÇíí~~ååââKKÅÅççããttÉÉÄÄWW==ïïïïïïKK~~ÜÜÉÉ~~ÇÇíí~~ååââKKÅÅççãã++==``ÜÜÉÉããááÅÅ~~ää==ooÉÉëëááëëíí~~ååíí==++==ooììëëíí==CC==``ççêêêêççëëááççåå==mmêêççççÑÑ====++==llÇÇççêê==ccêêÉÉÉÉ==++==aaììêê~~ÄÄääÉÉ==++==``ççããéé~~ÅÅíí====++==iiááÖÖÜÜíí==ttÉÉááÖÖÜÜííqqóóééÉÉ==ffff==ppÉÉïï~~ÖÖÉÉ==qqêêÉÉ~~ííããÉÉååíí==mmää~~ååíí==EEppqqmmFFrp=`ç~ëí=dì~êÇ=`ÉêíáÑáÉÇ ~åÇ=fjl=OMNM=^ééêçîÉÇ qqÜÜÉÉááëë==ÅÅççååëëííêêììÅÅííÉÉÇÇ==ççÑÑ==eeÉÉ~~îîóódd~~ììÖÖÉÉ==iiii==mmççääóóÉÉííÜÜÉÉääóóååÉÉ==ììëëááååÖÖ==ííÜÜÉÉ==ããççëëíí~~ÇÇîî~~ååÅÅÉÉÇÇ==ëëíí~~ííÉÉJJççÑÑJJííÜÜÉÉJJ~~êêíí==êêççíí~~ííááççåå~~ääããççääÇÇááååÖÖ==ééêêççÅÅÉÉëëëë==ÅÅêêÉÉ~~ííááååÖÖ==~~==ììååááíí==ííÜÜ~~íí==ááëëWW++==iiççïï==jj~~ááååííÉÉåå~~ååÅÅÉÉ46 MNJuly 2012