The 43' Aluminum Trawler Yacht
'Boojum'
General Concept
This 43' power vessel has essentially the same mission statement as the Greatheart 48: "Fit the maximum boat into the readily available robust 4 cylinder marine diesel engines." As a preliminary, the Boojum 43 shares the same interior layout (exactly) as the Greatheart 48, the same waterline length, and the same displacement. Still, they have different hull forms as follows...
The 43 foot Boojum has a hull form similar to the 25 foot Boojum and the 30 foot Buster. However, the Boojum 43 has lines which are considerably more fine, very much like Terrier and Nidaros. Her fantail stern and plumb bow contain the overall length very nicely, making this vessel about 5 feet shorter in overall length than the GH 48, even though both vessels have the same displacement and the same waterline length.
Waterline length for both vessels is 40 feet light, and 41 feet loaded. Displacement will be around 30k lb. light and around 40k lb. loaded. Beam is 12.5 feet.
Power
Sails will be used as emergency get-home power, and we have chosen a very conservative ketch rig. Both the Boojum 43 and the Greatheart 48 have twin keels of a fairly conservative size. The twin keels are for the sake of sitting on the mud, to carry a small quantity of ballast, for enhanced rolling resistance, and for the sake of providing windward performance under get-home sail power.
Power required will be around 80 to 85 hp for either vessel. Engine choices are the 4 cylinder John Deere, the 4 cylinder Lugger, the Gardner 5 LW, or the 4 cylinder Cat 3304-B. Any of them would be excellent. The JD or Lugger provide a bit of weight savings over the other two engines, at the same time as providing the same horsepower. The hull shape and structure provide a hull form that is very light in weight. Top speed with either vessel will be around 8.5 knots. Range is anticipated to be over 3,000 NM using around 700 gallons of fuel.
Interior
The layout below will have a kid's or guest stateroom aft, with two quarter berths and a big school desk on center facing aft. There will be a settee in the Pilot House to seat four comfortably.
Forward, the galley will be on both sides below the companionway. There will be a pair of easy chairs forward of the galley to port and starb'd, essentially forming the ship's library and galley social area rolled into one.
Forward of that will be a head to port, and a shower / tub to starb'd. The forward stateroom is for the owners, and features an island berth right forward with very adequate hanging lockers and other storage.
Design Summary
The profile is quite attractive with either hull form... The Boojum 43 is more "stout" and "rugged" looking, while the Greatheart 48 is a bit more "sleek" and "refined" looking. I have now posted study drawings for the Greatheart 48 on a separate page. The GH 48 Interior Profile & Arrangement drawings show the interior layout which would be used for the Boojum 43.
Alternates...?
While the Boojum 43 was intended for all aluminum alloy construction, it was actually inspired by a prior prototype for all steel construction. This prototype was called the Borgnes 43, an image of which is above. You can see that there are several key differences. The hull is heavier in order to accommodate the steel structure, therefore among the common 4 cylinder marine diesel engines a turbo would be specified. Also, there no bilge keels are planned and the house arrangements are different.
The pilot house is shorter, allowing much more space below for a large saloon. Otherwise the layout is the same as with the Boojum 43. The Borgnes 43 also makes use of a small trunk cabin aft, and a long trunk cabin forward, rather than the flush foredeck of the Boojum types.
Either way, the result is very fine...
Direct Quote from an aluminum boat owner...
As an owner since 5 years of an aluminum boat I could not agree more with your preference for this material. She is a great boat and requires very little in the way of maintenance. I do a lot more reef snorkeling than the paint, polish, varnish and wax guys!--Peter Kminek
Please see the Plans List page to review our available Boat Plans.
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