The X One Design, commonly referred to as the XOD, represents the pinnacle of traditional Solent racing and stands as a testament to the enduring genius of naval architect Alfred Westmacott. Commissioned in 1909 and first launched in 1911, the XOD was envisioned as a robust, affordable day racer capable of handling the challenging tidal conditions of the Isle of Wight. More than a century later, the class remains one of the most competitive and prestigious one-design fleets in the United Kingdom. Built primarily of wood—traditionally silver spruce for the mast and mahogany or cedar on oak frames for the hull—the vessel’s longevity is maintained through rigorous class rules that preserve its classic silhouette while allowing for the meticulous craftsmanship of modern builders like David Heritage Racing Yachts. With nearly 200 boats built and a significant percentage still actively racing, the XOD provides a unique bridge between Edwardian maritime elegance and modern tactical racing.
UK X OD Information, Review, Specs

- Make
- UK
- Model
- X OD
- Builder
- Woodnuts
- Designer
- Alfred Westmacott
- Number Built
- Production Year(s)
- 1909 - ??
Sailing Performance & Handling
The XOD is a heavy-displacement open keelboat that emphasizes tactical prowess over raw speed. With a length overall of 21 feet and a displacement of approximately 1,350 kg, the boat possesses a remarkably high ballast ratio, which provides the stiffness necessary to carry its 225 square feet of sail area in the brisk winds of the Solent. Handling the XOD is often described by purists as an exercise in momentum management; the heavy lead keel allows the boat to carry its way through stays effectively, a crucial trait when short-tacking against the fierce tides of the Hurst Narrows or the Bramble Bank.
Despite its age, the rig is surprisingly tunable. Originally designed with a gaff rig, the class transitioned to a Bermudan sloop configuration in 1928, which significantly improved its upwind performance. According to technical insights from the XOD Class Association, the boat is known for being "wet" in a blow due to its low freeboard, requiring an active crew to manage the jib and main trim to keep the hull at its optimum heel angle. The absence of a winch for the jib means that crew strength and technique are paramount, making the XOD a true sailor’s boat where finesse and physical effort are rewarded.
Popular Mentions & Media
The XOD is inextricably linked with Cowes Week, where it historically boasts the largest starting line of any class. The most coveted prize in the class is the Captain’s Cup, a trophy that has become a "holy grail" for UK keelboat racers. The intense competition of the fleet was highlighted during the 2011 Centenary celebrations, which saw 145 boats on a single starting line, a feat of organization and seamanship that remains a landmark event in British yachting history. The class has also attracted high-profile owners over the decades, including Olympic medalists and America’s Cup sailors who return to the XOD for its "level playing field" racing.
Known Issues & Buyer’s Checklist
Prospective owners of an XOD must approach the purchase with a "wooden boat mindset," as maintenance is significantly more involved than that of a modern GRP vessel. Because the class rules strictly dictate wooden construction, the integrity of the hull and its structural members is the primary concern.
- Rib and Frame Integrity: It is common for the steam-bent oak ribs to crack over time, particularly in the turn of the bilge. A thorough inspection should look for "sistering" (repairs where a new rib is placed alongside a broken one), which can indicate the boat's overall structural health.
- Keel Bolt Corrosion: Given the age of many hulls, the condition of the keel bolts connecting the lead ballast to the wooden keelson is critical. If there is evidence of "smiling" (a gap appearing at the leading edge of the keel-to-hull joint), the bolts likely require replacement.
- Fastening Fatigue: Traditional copper-clenched nails or bronze screws can lose their grip or "weep" over decades. Buyers should look for signs of "nail sickness," evidenced by dark staining around the fastenings or planks that appear to be "springing" away from the frames.
- Weight Management: The XOD has a strict minimum weight limit. Older boats that have undergone multiple heavy repairs or absorbed significant moisture into their timber may struggle to stay at a competitive weight. Conversely, very light boats may require internal correctors to remain class-legal.
Community & Resources
The XOD community is exceptionally well-organized, centered around the XOD Class Association, which manages the strict one-design rules and coordinates the racing calendar across several "Divisions" including Cowes, Lymington, Parkstone, Itchenor, and Hamble. For technical restoration work and new builds that adhere to these historic standards, David Heritage Racing Yachts is the preeminent authority, providing the specialized joinery and shipwright skills required to keep these century-old designs at the front of the fleet.
The Verdict
The XOD is a masterclass in enduring design, offering some of the most competitive one-design racing in the world for those who appreciate the aesthetic and tactile nature of a wooden keelboat.
Pros:
- Elite Competition: The depth of talent in the fleet is among the highest in the UK keelboat scene.
- Timeless Aesthetics: A beautifully maintained XOD is widely considered one of the most attractive boats on the water.
- Strong Resale Value: Due to the prestige of the Captain's Cup and the class's longevity, well-sorted boats hold their value exceptionally well.
Cons:
- High Maintenance: Annual varnishing, painting, and potential structural wood repairs require significant time or budget.
- Physical Demands: The lack of modern mechanical advantages like winches makes it a physically taxing boat to race in heavy weather.
- Specialized Knowledge: Successful campaigning requires an understanding of both traditional shipwrighting and complex Solent tidal navigation.
Measurements
Construction & Hull
- Construction Material
- Wood
- Hull Type
- Monohull Sailboat
- Keel Type
- Full
- Rudder
- 1x Attached
- Ballast
- 1455 lbs (Iron)
- Displacement
- 2875 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 20.68 ft
- Waterline Length (LWL)
- 17.08 ft
- Beam
- 5.92 ft
- Draft
- 3 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Fractional Sloop
- P (Main Luff)
- 23.75 ft
- E (Main Foot)
- 11.5 ft
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 190 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 15.03
- Ballast / Displacement Ratio
- 50.61
- Displacement / Length Ratio (D/L) Ratio
- 257.59
- Comfort Ratio
- 22.88
- Capsize Screening Formula
- 1.67
- Hull Speed
- 5.54 kn