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3123 Fairview Ave E.
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Seattle, WA 98102


Power Multihulls

38' Trimaran Trawler

38' power trimaran in composite and developed plywood - a "kayak mothership."

This design has been updated from the original unit shown above. It has larger amas with reverse bows for even smoother ride. And a straight tube option is offered as simpler than the 4 sliding crossarm tubes to get skinny.

This 38’ power trimaran was designed as a “mothership” for a Texas couple who are avid kayakers. It will allow them to power out dozens or even hundreds of miles to the prime kayak cruising areas carrying a full compliment of the little boats. This tri is a kayak range multiplier.  When the days paddling is done, the galley, shower, and generous double berths provide a welcome respite.

The main stateroom, all the way aft, has a big double berth, with lots of ventilation built in to the space. Forward of the stateroom is the head space with head, shower, and sink on the counter. The helm station, raised for good visibility, is large enough for dining and lounging for four. Back down forward is a large galley. Ahead of that is another double berth.

The main hull is built of strip core material with plywood/core/plywood panels on the topsides, deck and house areas. The rounded, cored parts of the flared main hull are sheathed in triaxial roving.
The amas are built of cylinder molded epoxy plywood.

The overall beam is 16’-11” (5.16m) but the amas can be slid in toward the main hull for marina berthing or trailer storage. The connectives are the tried and true aluminum mast sections set in glass sleeves in the hulls. The main hull is legal trailering width of 8’-6” (2.59m)

6.5 hp will push this tri at hull speed, the specified twin 15 hp outboards will push it along at over 12 knots. See data on vessel range.

As a later option, a beachcat rig or two can be added for a sail assist to the outboards if a favorable wind comes up.

 38pwrtritopg.gif (57277 bytes)38pwrtriINTg.gif (58903 bytes)38pwrtriDTLg.gif (64212 bytes)
Length overall: 38'-0" (11.6 m)
Length at waterline: 37'-6" (11.5 m)
Beam: 16'-11" (5.16 m)
Draft: 1'-6" (0.46m)
Weight: 4,125 lb
Displacement: 5,278 lb (2.394 kg)


Study plans:  $100
Email Study Plans:  $50
Full plans:  $3000

All study plans are now available for email delivery at half the price of paper plans!

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