This aluminum boat design (plan) of a 26 FT Orca features a Cummins QSB5.9 diesel, and an Arneson ASD8 surface piercing drive system. The Sisu lobster boats are known for being built solid and holding steady in rough water -- traits lobstermen need. While built to haul in lobster traps in choppy waters, the Sisu can also function as a recreational boat. The owner had the transmission overhauled in February 2005 and the engine overhauled in August 2005.
The owner has used it mostly for fishing and for pleasure trips with his children and grandchildren. The helm is enclosed on three sides, providing comfort even when the weather isn't comfortable. The drive has a four-blade brass propeller, which helps maximize maneuverability around docks. The owner replaced the plexiglass in the windows with 10 custom-designed car windows, which are shatterproof, clearer, and easier to clean.
Take a look at ALL ***167 PICTURES*** of this vessel on our main website at POPYACHTS DOT COM. It employs the same basic radius chine plywood construction technique, scaled down to suit the smaller boat but takes it a step further into the plywood precut kit concept. The backbone is also of plywood, on edge, slotted through the bulkheads as a self-jigging eggcrate arrangement to assist setting up the framework.
Assembly of the hull follows the principles of model aeroplane construction, with stringers slotted into the bulkheads for attachment of the skin.
The standard keel is a vertical dropkeel with a 400kg bulb on the end of the high aspect foil. The cockpit and bridgedeck together are 3m long, giving plenty of space for working the boat while racing or socialising or sunning when cruising.
The fractional and masthead spinnakers are asymmetric, set on a retractable pole on the foredeck. Included in the stock plan package are full size patterns of the backbone and various other components, plotted onto mylar film on our large format inkjet roll plotter. Gentleman and Ladies, first time post, have stalked a bit but im throwing my name in the ring.


I have a Bukh DV10, single cyl, 10-hp Diesel engine in good operating condition, with manuals, available, if that would serve. I was contemplating the very type of boat you describe, but have purchased an Albin-25 instead. Ijssel is a great looking launch but its going to be a lot of work - I'd bet 2500 hrs at least for strip planking and some interior accomodation. At POP Yachts International, we will always provide you with a TRUE REPRESENTATION of every vessel we market. The small size of the vessel permits the elimination of the laminated floors needed to support the keel loads in the larger boats. It extends from the stemhead to the transom and has large radius structural fillets to tie it into the hull skin. The hull skin is single skin plywood to the sides and bottom and the radius is done in two layers.
The cabintop is designed with a multi-chine skin and is assembled over the bulkheads by the stitch and glue method for a strong and lightweight structure.
Epoxy coated and painted inside and out to hull and deck, a good standard of finish is achievable with little or no fairing aside from forming fillets at internal angles. This uses a hollow aluminum casing for the foil, constructed over tubular inner framing and fitted with the same bulb options as the lifting keel. The inboard end is fitted on a radiused transverse track to allow the outboard end to be projected up to weather for sailing at deeper angles.
Bulkhead shapes are simple and easily set out from clear diagrams, the setting out taking about 2 to 3 hours per bulkhead.
To get WoodenBoat delivered to your door or computer, mobile device of choice, etc, click WB Subscriptions. I live in md and am looking for a seaworthy, inboard diesel, displacement hull vessel for the Chesapeake Bay and occasional Coastwise Cruiser.
Depending who you talk to and what they are used to building, flat bottoms can be built faster or vice versa.
Three ship's carpenters produced the boat in three weeks after the company's architect designed it.
We are a full-service brokerage company, ready to assist you with all the details, including photographing, inspections, shipping, CE certification, shrink wrap, paperwork and anything else that might come up!


The addition of a layer of glass fabric to the outside will give increased resistance to knocks but will add weight and require fairing, thereby adding a fair amount to construction time and cost. The casing is bolted through the hull bottom to an aluminum support box, which is bolted to the internal structure of the hull. They are located where they can be operated from the companionway, the bridgedeck or the weather rail. Extension and retraction of the pole can be done from either rail, with the pole retracting to whichever side is convenient at the time. The dropkeel casing forms one side of the enclosed heads compartment, which includes a bin type wet locker. Down below it goes along with a pair of quarter berths, also more suited to the hairy chested racer and use under sail. Although not designed to their limits, she was drawn to fit within the class rules of the now defuct Australian Level Class 800 Association, a set of rules that was formulated to give boat-for-boat racing for trailer sailers.
For those who would prefer to have full size patterns for the bulkheads, we can also supply them as an optional extra. Please allow us to be your eyes and ears on the ground and assist you with your next vessel purchase. All of these parts are plywood and epoxy filleted together, making for simplified construction.
The bulb can be done in either a simple vertical sided foil section for owner casting or a torpedo shape for professional casting. A light drifter can be flown outside the shrouds and sheets to the spinnaker blocks on the quarters. The prime berth in the boat is a large transverse double under the bridgedeck, great for use on moorings or at anchor. Whichever route you choose, we will be available to assist with advice if any problems arise.



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