The Gremlin is a vintage 12.5-foot (3.8-meter) sailing dinghy that holds a unique place in the mid-century sailing boom, particularly within the realm of amateur-built and kit-based vessels. Though the "Usa" manufacturer designation often points to its widespread adoption by various small-scale North American fiberglass molders and plywood kit providers, the design is most frequently attributed to Peter Ennion. It was conceived as a versatile, stable, and affordable entry point into the sport of sailing, bridging the gap between a pure racing skiff and a utilitarian rowing pram. Built primarily in the 1950s through the 1970s, the Gremlin features a hard-chine hull—a design choice that favored the simplified construction techniques of the era while providing a "built-in" stability that appealed to families and novice sailors.
Usa Gremlin Information, Review, Specs
- Make
- Usa
- Model
- Gremlin
- Builder
- Zephyr Marine
- Designer
- —
- Number Built
Sailing Performance & Handling
The Gremlin is characterized by a high degree of initial stability for a boat of its length, largely due to its generous beam and hard-chine hull form. When sailing, this translates into a predictable "locking" sensation when the boat reaches a certain degree of heel, making it less "twitchy" than rounded-hull competitors like the Laser or the Firefly. The boat typically carries a sloop rig, though many were outfitted with a simpler cat rig for solo training.
In terms of handling, the Gremlin is an honest but unhurried performer. It tracks reasonably well thanks to a sizable centerboard, though its relatively heavy displacement for a 12-foot boat means it requires a decent breeze to truly come alive. While it lacks the planing potential of modern high-performance dinghies, it excels in light-to-moderate air where its sail-area-to-displacement ratio allows it to move efficiently without demanding extreme physical exertion from the crew. Owner anecdotes from historical archives of the Dinghy Cruising Association suggest that the Gremlin is a "sea-kindly" small boat, capable of handling choppy inland waters and protected coastal bays with a level of dry-sailing comfort that many narrow-beamed boats of the same era cannot match.
Popular Mentions & Media
The Gremlin's cultural footprint is primarily rooted in the "Do-It-Yourself" nautical movement of the mid-20th century. It was frequently featured in plans and technical guides for home builders, appearing in various nautical publications as a project boat for fathers and sons. While it has not been the primary vessel for famous solo circumnavigators, its role as a foundational trainer for thousands of young sailors in North America and the United Kingdom has earned it a legacy of "the first boat I ever owned." It remains a staple in the "Classic Dinghy" sections of wooden boat festivals and is often cited in technical discussions regarding the evolution of plywood boat construction.
Known Issues & Buyer’s Checklist
For those looking to acquire a vintage Gremlin, the inspection process varies significantly based on whether the vessel is a fiberglass production model or a plywood home-build.
- Centerboard Trunk Integrity: On both wood and fiberglass models, the centerboard trunk is a primary failure point. Inspect the joint where the trunk meets the hull for signs of stress cracking or rot. Leaks here are notoriously difficult to seal permanently without significant structural work.
- Plywood Chine Rot: In wooden variants, moisture tends to trap in the hard chines. Use a plastic hammer to "tap" along the chine; a dull thud indicates delamination or rot within the plywood layers.
- Transum and Gudgeon Stress: The transom of the Gremlin often served as a mounting point for small outboard motors in addition to the rudder. Check for "crazing" in the fiberglass or soft spots in the wood around the rudder gudgeons, which indicates the core has been compromised by water ingress.
- Mast Step Compression: The downward pressure of the rig can compress the mast step over decades. Ensure the deck or keelson (depending on the rig type) is not sagging or showing radial cracks around the base of the mast.
- Flotation Tanks: Early Gremlins used built-in air tanks for buoyancy. These are rarely airtight after 50 years. Any prospective buyer should verify that the buoyancy compartments are intact or have been updated with modern closed-cell foam or heavy-duty airbags.
Community & Resources
The primary hub for technical data and preservation of this model is the Gremlin Class Association, which has historically maintained records of sail numbers and construction nuances. While a dedicated modern website for a US-specific manufacturer is non-existent due to the age of the design, technical support is frequently found through the Dinghy Cruising Association (DCA), where members share rigging diagrams and restoration logs for "classic" small craft.
The Verdict
The Gremlin is a charming, stable, and historically significant dinghy that serves as an excellent project for a restorer or a gentle trainer for a young family.
Pros:
- High initial stability makes it a safe platform for beginners.
- Classic aesthetics that turn heads at any boat ramp.
- Versatile enough to be rowed or powered by a small outboard when the wind dies.
Cons:
- Heavier and less portable than modern composite dinghies.
- Older wooden examples require significant ongoing maintenance.
- Performance is utilitarian rather than exhilarating.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Daggerboard
- Rudder
- 1x —
- Ballast
- -
- Displacement
- 115 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 10.33 ft
- Waterline Length (LWL)
- -
- Beam
- 4.58 ft
- Draft
- -
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Cat Rig
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 70 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 47.36
- Ballast / Displacement Ratio
- —
- Displacement / Length Ratio (D/L) Ratio
- —
- Comfort Ratio
- —
- Capsize Screening Formula
- 3.77
- Hull Speed
- — kn