Design Brief & Intent
The design brief for the Triangle 20 was highly ambitious: to deliver the performance of a spirited daysailer in a package that offered genuine cruising amenities. Unlike many pure daysailers of the era that offered little more than a canvas cuddy cabin, the Triangle 20 featured a fully enclosed, molded fiberglass cabin trunk providing a respectable 54 inches of headroom. Inside, the arrangement was surprisingly sophisticated for its size, housing a double V-berth in the bow, a starboard galley equipped with a two-burner stove and icebox, and a dedicated head compartment to port where an ingenious sink drained directly into the marine toilet.
Charles Angle chose a stub keel with a retractable centerboard configuration, a layout designed to satisfy the needs of East Coast and Great Lakes sailors who demanded shallow-draft versatility for gunkholing and easy trailering, yet wanted the security of fixed ballast. The boat was heavily built using the thick, hand-laid fiberglass laminates characteristic of early 1960s construction, resulting in a robust structure. However, because many units were delivered as kits for owner completion, the interior finish, joinery, and electrical standards can vary dramatically today depending on the skill of the original backyard builder.
Sailing Performance & Handling
Under sail, the Triangle 20 behaves with the reassuring momentum of a traditional pocket keelboat while retaining the agility of a centerboarder. With a displacement of 2,300 pounds and a ballast-to-displacement ratio supported by an 800-pound ballast package housed in its shallow stub keel, the boat possesses a low center of gravity that helps it carry its sails longer than lighter, unballasted swing-keel trailer sailers of similar length. This moderate weight is reflected in its displacement-to-length ratio of 221.65, which gives the boat a surprisingly soft ride in a chop, slicing through waves rather than bouncing over them.
A sail area-to-displacement ratio of 18.82 indicates a relatively generous and powerful fractional sloop rig. This allows the Triangle 20 to ghost along capably in light air and accelerate quickly out of tacks, though the helm will quickly signal when it is time to reef as the breeze freshens. At the other end of the scale, its comfort ratio of 14.7 reminds sailors of its small physical footprint; while stable for its class, it will feel lively and exhibit a rapid motion in a heavy seaway. The capsize screening value of 2.15 confirms that this is a boat designed for coastal exploration, protected bays, and inland lakes, rather than true offshore passage-making, as its wider beam relative to its overall displacement places it outside the parameters of ocean-racing stability standards.
Known Issues & Maintenance Triage
Given that surviving hulls are now over six decades old, prospective buyers and owners must approach the Triangle 20 with a focus on structural preservation. The primary areas of concern center around deck coring and the centerboard assembly. Early fiberglass builds often utilized plywood or balsa cores in the deck and cabin top, which are prone to moisture intrusion and rot around the mast step, chainplates, and deck hardware. Hand-testing for soft spots and checking the under-deck backing plates is essential.
The centerboard trunk and its lifting tackle are another classic triage point. The pivot pin can wear over time, leading to leaks or clanking, while the metal centerboard itself is prone to heavy corrosion if neglected, which can jam the board inside the trunk. Because these boats were typically equipped with an outboard motor well or transom bracket, the surrounding transom laminate should be thoroughly inspected for stress cracks and core rot caused by decades of pushing against outboard vibration. Additionally, because a significant portion of the fleet was completed from factory kits, the wiring, plumbing, and structural bulkhead bonding must be evaluated individually, as amateur installations from the 1960s rarely align with modern marine safety standards.
The Verdict
The Triangle 20 remains a charming and historically significant piece of fiberglass yachting history. For the sailor who appreciates classic lines, a solid hull, and the ability to explore shallow waters while retaining basic weekend accommodations, this rare pocket cruiser offers exceptional value and character.
- Extremely versatile shallow-water capability with the centerboard up.
- Robust, heavily laid-up fiberglass hull from the early days of composite construction 3.
- Clever interior layout with a functional galley, V-berth, and dedicated head compartment.
- Excellent light-air sailing performance due to a powerful rig and balanced hull shape.
- Variable interior build quality and wiring on units completed from factory kits.
- Age-related vulnerability to core rot in the decks and cabin top.
- High maintenance demands for the centerboard trunk, pivot pin, and lifting pennant.
- Low headroom and lively motion in open water compared to larger, modern pocket cruisers.
