The Larchmont O Class represents a pinnacle of early 20th-century American racing yacht design, conceived by the legendary naval architect William Gardner in 1916. Commissioned by the Larchmont Yacht Club to provide a fast, elegant one-design fleet for its members, the "O" boats were designed to the Universal Rule, bridging the gap between the stout sea-kindliness of older designs and the emerging performance of the Marconi rig era. Built by the Wood & McClure shipyard in City Island, New York, these yachts were roughly 59 feet 10 inches in length overall, with a slim 12-foot beam and a draft of 7 feet 10 inches. The class is perhaps most significant for its role in proving the superiority of the Marconi (Bermudan) rig over the traditional gaff rig; specifically, the hull Varuna became a historical milestone when it demonstrated that its tall, wireless-influenced spar was consistently faster on all points of sail than the older gaff-rigged competitors.
Larchmont O Class Information, Review, Specs

- Make
- Larchmont
- Model
- O Class
- Builder
- Wood & McClure
- Designer
- Willliam Gardner
- Number Built
- 6
- Production Year(s)
- 1917 - ??
Sailing Performance & Handling
The Larchmont O Class was specifically engineered for the lighter, more variable winds of Long Island Sound. With a displacement of approximately 35,500 lbs and a ballast ratio exceeding 50%, the O Class carries a significant amount of lead low in the keel, which allows it to support an expansive sail plan. Historically, these boats carried roughly 1,670 square feet of canvas, giving them a much higher sail-area-to-displacement ratio than contemporaries like the New York 40. According to historical accounts archived at the Larchmont Yacht Club, the hull was known for its "needle-like" entry and fine lines forward, which reduced resistance and allowed the boats to ghost along in light air that would leave heavier hulls becalmed.
Under sail, the O Class is described as exceptionally sensitive and balanced. The transition from the original gaff rig to the Marconi rig—pioneered by Varuna—completely changed the boat's handling characteristics by significantly reducing the weight aloft and the need for complex top-hamper. In a seaway, the long overhangs (nearly 21 feet of the boat's length is out of the water) provide a powerful reserve of buoyancy, causing the boat to lift gracefully over swells rather than plunging through them. However, because of their extreme slimness and high sail area, they require active reefing and attentive trimming to maintain an optimal heel angle.
Interior Comfort & Variations
While primary attention was paid to their racing pedigree, the Larchmont O Class yachts were designed with the amenities required for coastal cruising and club-circuit overnighting. The interior was finished in traditional hardwoods, typically featuring a mahogany-trimmed salon with a drop-leaf table and settee berths. Historical brokerage advertisements from the 1920s noted that the vessels often included a double stateroom aft of the main mast and a functional galley.
Because the boats were built as a one-design class, the internal structural layout remained consistent across the initial six hulls—Georgia, Varuna, Nimbus, Grey Dawn, Maisie, and Betty. However, individual owners occasionally modified the cabin sole and cabinetry to suit their aesthetic preferences. Over the decades, some hulls like Mirage underwent more significant interior overhauls during restoration to accommodate modern amenities while maintaining the original William Gardner aesthetic.
Popular Mentions & Media
The O Class frequently appeared in the headlines of the New York Times during the 1920s, often described as "easily winning" regattas throughout the Northeast. One famous account from July 1928 details the yacht Mirage taking a dominant victory at the City Island Regatta. The class also features prominently in the photography of the Rosenfeld Collection at Mystic Seaport, where glass-plate negatives capture the O Class at the height of its racing glory, showcasing its distinctive "L" within a circle class symbol.
Known Issues & Buyer’s Checklist
Prospective owners of a Larchmont O Class—or any Gardner-designed wooden racer from this era—face the specialized maintenance requirements of early 20th-century construction.
- Structural Flooring & Keel Bolts: The massive amount of ballast and the narrow hull shape place extreme stress on the floor timbers. Inspections should focus on the wood surrounding the bronze or iron keel bolts for signs of compression or "iron sickness" if the bolts were not upgraded to bronze.
- Stem and Stern Overhangs: The long overhangs are susceptible to "hogging" (sagging) over time. Look for evidence of sistered ribs or structural reinforcement in the extreme ends of the boat.
- Mast Step Stress: When these boats were converted from gaff to Marconi rigs, the compression loads on the mast step increased significantly. Ensure the step area has been adequately reinforced to handle modern rig tension.
- Planking Fastenings: Originally built with mahogany over oak, the integrity of the copper rivets or bronze screws is paramount. A comprehensive moisture survey and fastening "pull" are mandatory to ensure the hull remains tight.
Community & Resources
The primary repository for the history and technical drawings of the class is the Larchmont Yacht Club, which maintains an extensive archive of the "O" class’s contribution to the club's flagship history. Additionally, the International Yacht Restoration School (IYRS) has a history of involvement with classic Gardner designs and often serves as a resource for the specialized woodworking techniques required for these vessels.
The Verdict
Pros:
- Exquisite aesthetic with classic Gardner lines and long, graceful overhangs.
- Historically significant as the platform that popularized the Marconi rig in America.
- Superlative light-air performance and sensitive handling.
- Elite pedigree within the classic yacht racing circuit.
Cons:
- High maintenance costs associated with large-scale wooden hull restoration.
- Deep draft (nearly 8 feet) limits access to shallow harbors and coastal anchorages.
- Challenging to sail short-handed due to large sail area and traditional deck hardware.
Measurements
Construction & Hull
- Construction Material
- Wood
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x —
- Ballast
- 18000 lbs
- Displacement
- 35500 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 59.83 ft
- Waterline Length (LWL)
- 38.5 ft
- Beam
- 12 ft
- Draft
- 7.83 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Gaffhead Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 1700 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 25.18
- Ballast / Displacement Ratio
- 50.7
- Displacement / Length Ratio (D/L) Ratio
- 277.71
- Comfort Ratio
- 44.64
- Capsize Screening Formula
- 1.46
- Hull Speed
- 8.31 kn