43 Meter Trideck Motoryacht Preliminary Design

This seems to be a popular size as we have done a handful of proposals in this size range. This trideck motoryacht was designed in 2009. She is designed with a steel hull and aluminum superstructure. The boat is a full displacement hull, powered by twin Caterpillar C32s.

Here are the general arrangements for upper and lower decks.

Principal Dimensions
LOA 141-0"
LWL 124-7"
Beam 26-7"
Draft 8-6"

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Design 2679 Quad Deck Motoryacht

The design of this 4-deck behemoth was started in 2000. Shes a beast. Just look at the beam. The boat is designed with a steel hull and aluminum superstructure.

Extensive powering studies were undertaken which included a single screw option. The final power train selected was to be twin Caterpillar 3508B A-Rated diesel engines generating 1,000 hp each for a top speed of 14.8 knots.

Here is the general arrangement plan.


Sadly, the project was stopped when the clients were tragically killed in a boating accident.

Principal Dimensions
LOA 185-0"
LWL 161-1"
Beam 31-2"
Draft 9-0"

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Design 2573 Swiftships 105 Trideck Motoryacht

This preliminary design was commissioned by Swiftships of Morgan City, Louisiana in 1990. My assumption is that it was prepared for a client of theirs. The boat was designed to be constructed of fiberglass. The project was taken no further than what you see here and the associated naval architecture required to produce the hull form, calculate propulsion requirements, fuel needs and so forth.

It is extremely difficult to achieve a sleek looking trideck motoryacht at 105 without the boat looking very bulky. The result was reasonably attractive.

Here are the accommodations plans.

Principal Dimensions
LOA 105-0"
LWL 93-3"
Beam 24-9"
Draft 10-6"
Displacement (1/2 load) 253,400 lbs
Fuel Oil Capacity 6,000 gals
Fresh Water Capacity 1,000 gals
Propulsion Twin Detroit 16V149TI - 2,200 hp each @ 2,100 rpm


Cruise Speed 22 knots
Max Speed 25+ knots

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Design 2767 40 Flybridge Motoryacht

The client for this preliminary design approached us after seeing our Pegasus design. The boat was enlarged slightly and changes were made based on his requirements, such as the addition of a flybridge. The following two general arrangement options have been proposed.

Principal Dimensions
LOA 40-0"
LWL 38-11"
Beam 12-11"
Draft 5-0"
Displacement 26,500 lbs (1/2 load)

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