Hi, Roger Hill here. Although I sometimes enjoy reading the various topics that crop up on this forum I don't often contribute, so here goes! I have been away for a couple of weeks and only yesterday picked up on some dialogue going on about fuel efficiency and comparisons between the Seles and the Prowler VT950. I designed the Seles cat so know a little about it and how it performs. I don't actually know exactly what the fuel burn figures are for that boat and am not sure how accurate they are. The 0.88L/NM figure at 15 knots is presumably off their web site. As a general rule I do not believe any statistics published about designs if they are done so by someone with a vested or commercial interest in that boat and I do not publish performance and fuel consumption figures of my own designs unless they are the results from an independent test. The Seles 10.2m and the Prowler 950 are of a similar size and displacement (10.2m X 4.5m Seles versus 9.5m X 5.5m Prowler) but they are completely different hull forms. The Seles cat is a pure displacement hull and the Prowler is a planing hull (all be it a rather radical shape for a planing hull) and by that fact alone it is extremely difficult to make direct comparisons. The handling and sea keeping ability, stability, motion at rest and in a seaway, etc. would all be quite different. The optimal engine size for the Seles design is in a range of 50 to 70 hp per side with outboards and I think that the Prowler is more than double that amount. The fuel consumption figures that I do have for a sister ship of the Seles fitted with a pair of 60hp Yamaha 4 strokes, loaded displacement of 4,153kg (Prowler has a published figure of 5,500kg loaded) range from 3700rpm, 12.75 knots, 1 L/NM both engines, 4300rpm, 15.6 knots, 1.28L, 5,500rpm, 21 knots, 1.8 L/NM. For a reasonably well built (down to designed weight specified) planing cat of similar dimensions we would expect (figures for a 9.5m planing cat fitted with a pair of 200hp Evinrudes) at 4500rpm, 25 knots, 2.31 L/NM both engines and a top speed of 38.1 knots. The Seles cat was a 'one off' built in Auckland New Zealand and is currently operating very successfully as a bare boat charter vessel in Queensland Australia. There have been several of these 10m displacement hull cats built with various layout and deck styling changes and there is currently underway in Australia a new 10.65m production built version by Argus Boats. The company that built the Seles cat has since been 'reformed' and is now South Pacific Boat Builders. I have no information on what the PDQ 34 goes like so have not included it in this conversation. To convert from metric to those old fashioned figures a US gallon is 3.785L, a kilogram is 2.2046 lbs, and a metre is 3.281 feet. Regards Roger Hill www.powercatsnz.com