Malibu Outrigger Information, Review, Specs

Malibu Outrigger Drawing
Make
Malibu
Model
Outrigger
Builder
Designer
Warren Seaman
Number Built
Production Year(s)
1952 - ??

Designed in 1950 by Warren Seaman, a World War II veteran and carpenter who drew inspiration from the Hawaiian outrigger canoes he encountered while stationed in Maui, the Malibu Outrigger stands as a foundational design in the history of American multihull sailing. Developed specifically for the challenging surf of the California coast, the boat was the centerpiece of the Malibu Yacht Club during the mid-20th century. It provided a fast, accessible, and egalitarian alternative to the expensive yachts of the era, long before the mass-market success of the fiberglass catamaran.

Originally built from marine plywood and spruce, the 19-foot design (technically 18' 10") was engineered for home construction. It featured a main hull (the wa’a) and a single outrigger float (the ama), connected by two slender wooden crossbeams known as iakos. While the design was deeply influenced by Polynesian tradition, it was adapted for Western sailing styles; rather than "shunting" (reversing direction), it was designed as a "tacking" outrigger, allowing it to navigate the Pacific coast’s breakers with relative ease.

Sailing Performance & Handling

The Malibu Outrigger is defined by its remarkable power-to-weight ratio. Carrying 192 square feet of sail on a hull weighing approximately 250 pounds, the vessel offers an exhilarating, high-performance experience. Its most famous characteristic is its ability to "fly the ama," where the windward outrigger lifts off the water to reduce drag, a maneuver that requires precise weight distribution and active sheet management.

According to historical performance reports in Duckworks Magazine, the boat was "tank-tested" in the demanding conditions of the Catalina Channel, proving capable of reaching speeds that outpaced much larger monohulls of the day. The lateen rig—resembling a traditional "crab claw" sail—is unstayed and raised by a single halyard, offering a romantic, ancient silhouette while remaining surprisingly simple to manage. However, sailors should note that because the rig lacks a jib and utilizes a low-aspect-ratio sail, the boat does not point particularly high into the wind compared to modern sloops. Handling is further specialized by the use of a deep daggerboard and a steering oar or sweep, though many later versions were retrofitted with more conventional rudders.

The Malibu Outrigger holds a significant place in nautical history as the direct inspiration for Hobie Alter. Historical accounts note that Alter, before creating the Hobie Cat, spent time watching Malibu Outriggers launch through the surf at the Malibu Yacht Club. The boat's construction plans were famously featured in the June 1958 issue of Popular Mechanics, which helped the model achieve its estimated production run of over 2,000 units. It also gained notoriety for its "hot rod" reputation, frequently used for high-speed runs between the California mainland and Catalina Island by surfers and carpenters who formed the core of the early multihull racing scene.

Known Issues & Buyer’s Checklist

For those looking to acquire a vintage Malibu Outrigger, the primary concern is the integrity of its wooden construction. Most were built before the widespread adoption of modern epoxy resins.

  • Plywood Rot: Check specifically for soft spots in the hull bottoms and the transom areas. Early boats often used resorcinol glue, which can fail over decades if the wood was not properly sealed.
  • Iako Lashings: The crossbeams are traditionally lashed to the hulls to provide flexible strength in the surf. Inspect the attachment points and the structural beams for cracks or signs of mechanical stress.
  • Daggerboard Trunk: The high lateral forces generated by the large sail plan can lead to cracking or leaks in the daggerboard trunk, a common "gotcha" on home-built multihulls.
  • Mast Step: Since the mast is unstayed and free-standing, the mast step and the partners (where the mast passes through the deck) bear immense loads. Ensure there is no compression damage or rot in the surrounding timber.

Community & Resources

While the original heyday of the Malibu Outrigger has passed, a small but dedicated community of builders and historians continues to preserve the design. The Malibu Yacht Club remains the spiritual home of the class, and technical drawings are still sought after by wooden boat enthusiasts. Technical wikis and specialized multihull forums like Boat Design Net continue to host active discussions on modernizing the rig with composite materials or carbon fiber spars.

The Verdict

The Malibu Outrigger is a "purist’s" multihull that captures the transition from ancient Polynesian craft to modern American beach cats. It is an ideal choice for the sailor who values historical aesthetics and beach-launching capability over the convenience of modern fiberglass.

Pros:

  • Historically significant design that influenced the catamaran revolution.
  • Extremely fast in reaching and downwind conditions.
  • Easily beach-launchable and manageable through surf.

Cons:

  • Requires significant maintenance if built in traditional plywood.
  • Poor upwind performance compared to modern jib-equipped boats.
  • Limited availability of professionally built examples; mostly home-built.

Measurements

Construction & Hull

Construction Material
Fiberglass (Plywood Core)
Hull Type
Catamaran Sailboat
Keel Type
Daggerboard
Ballast
-
Displacement
250 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
18 ft
Waterline Length (LWL)
-
Beam
11.67 ft
Draft
-
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Lateen
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
192 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
77.41
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
Comfort Ratio
Capsize Screening Formula
7.41
Hull Speed
— kn