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Sailboat Specifications

Trailertri 720

Fractional Sloop · Trimaran Cbrd.

Designed by Ian Farrier · Built by Sold As Plans · First built 1980

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LOA 23.62 ft  ·  Beam 16.34 ft  ·  Displacement 2,712.00 lb  ·  Sail Area 274.00 ft²  ·  Fractional Sloop  ·  Trimaran Cbrd.
About the Trailertri 720 Sailboat

Designed by renowned multihull architect Ian Farrier in 1980, this distinctive trimaran represents an early example of his innovative approach to trailerable multihull sailing. The boat's plywood construction and plans-built nature made high-performance multihull sailing accessible to amateur builders and budget-conscious sailors seeking the speed advantages of three hulls. With its fractional sloop rig and centerboard configuration, the Trailertri 720 delivers impressive performance for coastal cruising and daysailing. The generous beam of over 16 feet provides exceptional stability and interior volume while maintaining trailer compatibility. Farrier's design philosophy emphasizes ease of handling and forgiving sailing characteristics, making this trimaran suitable for sailors transitioning from monohulls to multihull sailing. The boat's moderate displacement and substantial sail area create a lively sailing experience with excellent upwind ability thanks to the centerboard system. While primarily intended for coastal waters and protected bays, the design's inherent stability and seaworthiness have proven capable of more adventurous sailing in experienced hands. The Trailertri 720 remains a testament to Farrier's ability to create practical, affordable multihulls that don't compromise on sailing performance or build quality.

Dimensions & Specifications
LOA (Length Overall) 23.62 ft / 7.20 m
LWL (Waterline Length) 21.65 ft / 6.60 m
Beam 16.34 ft / 4.98 m
Max Draft 4.27 ft / 1.30 m
Min Draft 1.41 ft / 0.43 m
Displacement 2,712.00 lb / 1,230 kg
Sail Area (Reported) 274.00 ft² / 25.46 m²
Design & Construction
Hull Type Trimaran Cbrd.
Rigging Type Fractional Sloop
Construction Plywood
Designer Ian Farrier
Builder Sold as plans
First Built 1980
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Engine & Accommodations
KSP 0.74
Frequently Asked Questions

What is the Trailertri 720's comfort ratio?

The Trailertri 720 has a Ted Brewer Comfort Ratio of 4.53. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Trailertri 720 safe for offshore sailing?

The Trailertri 720 has a Capsize Screening Formula value of 4.69. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Trailertri 720?

The theoretical hull speed of the Trailertri 720 is 6.23 kn knots, calculated from its waterline length.

How much does a Trailertri 720 weigh?

The Trailertri 720 has a displacement of 2,712.00 lb and a length overall (LOA) of 23.62 ft.

Who designed the Trailertri 720?

The Trailertri 720 was designed by Ian Farrier, first built in 1980.