The Sunstar 18 is a quintessential example of the British "pocket cruiser" era, designed by Arthur Howard and produced by Cobramold Ltd and Sun Yachts Ltd during the 1970s. Measuring exactly 18 feet in length, this masthead sloop was developed to provide an affordable, trailerable entry point for families navigating the challenging tidal waters of the United Kingdom. It occupies a specific niche between its siblings, the diminutive Sunspot 15 and the more commodious Sunray 21, sharing the same design DNA of heavy-set bilge keels and a robust GRP (Glass Reinforced Plastic) layup. Unlike many modern ultralight day sailors, the Sunstar 18 was built with the intention of overnighting, offering a level of interior volume that was highly competitive for its size at the time of its release.
Sunstar 18 Information, Review, Specs
- Make
- Sunstar
- Model
- 18
- Builder
- Sun Yachts Ltd.
- Designer
- Arthur Howard
- Number Built
- Production Year(s)
- 1977 - ??
Sailing Performance & Handling
Under sail, the Sunstar 18 is characterized by its remarkable stability and forgiving nature, largely due to its bilge keel configuration. This design choice was deliberate, allowing the boat to "dry out" upright in tidal harbors or on sandy beaches—a critical feature for coastal cruising in regions like Kent or the Essex marshes. While the twin keels introduce more drag than a deep fin keel, they provide a dampened, stiff motion that inspires confidence in novice sailors.
The boat’s masthead rig is relatively conservative, ensuring that it remains manageable even as the wind freshens. The sail-area-to-displacement ratio suggests a vessel that requires a decent breeze to reach hull speed; it is not a "light-air flyer." However, owners frequently report that the Sunstar 18 tracks surprisingly well for a short-keeled boat. Its handling is described as "seakindly" for an 18-footer, preferring to punch through a chop rather than skittering over it. Because the rudder is transom-hung, steering remains responsive, though the helm can become heavy if the boat is over-canvassed, signaling the sailor to reef early.
Interior Comfort & Variations
The interior of the Sunstar 18 is a study in 1970s spatial efficiency. Despite its sub-20-foot footprint, the cabin typically features four berths: a compact V-berth in the bow and two quarter berths extending aft under the cockpit seats. While the "four-berth" claim is ambitious for four adults, it serves well for a couple or a small family with children. The cabin lacks standing headroom—a standard compromise in this size class—but offers enough "sitting up" room for comfortable dining or chart work at the small central table.
Most models were equipped with a rudimentary galley slide or shelf for a gimballed stove and a plastic sink basin. The storage is primarily located beneath the cushions, though the lack of dedicated lockers means that long-term cruising requires disciplined packing. Variations of the Sunstar 18 are rare, as most were built to a standard specification, though some later hulls may feature updated interior moldings or different timber trim choices compared to the early Cobramold versions.
Known Issues & Buyer’s Checklist
Prospective buyers should approach the Sunstar 18 with an eye toward the common pitfalls of 50-year-old GRP construction. While the hulls are generally "over-built" and thick, they are susceptible to the following issues:
- Keel Attachment Points: The bilge keels exert significant leverage on the hull when the boat is grounded or trailered. Inspect the internal floors and the area around the keel bolts for "spiderweb" cracking or signs of structural movement.
- Deck Delamination: Like many boats of its era, the Sunstar 18 uses a balsa or foam core in the deck for stiffness. If deck fittings (cleats, stanchions) were not re-bedded, water may have entered the core, leading to soft spots.
- Window Seals: The original acrylic windows were often secured with rubber gaskets that perish over time. Streaks of salt or water damage on the interior cabin liners are a primary indicator of failing seals.
- Original Rigging: Many of these boats still carry their original gold-anodized masts. While durable, the standing rigging (wires) should be replaced if its history is unknown, as stainless steel fatigue is not always visible to the naked eye.
Community & Resources
Owners of the Sunstar 18 often find technical support and social connection through the Leisure Owners Association, which, while primarily focused on the Leisure brand, frequently accommodates owners of Arthur Howard’s other designs due to the shared engineering philosophy. Because the Sunstar 18 was built in the same Gillingham region as the Sunray 21, regional UK sailing forums remain the best repository for hull-specific repair tips and original brochures.
The Verdict
The Sunstar 18 remains a viable "starter boat" for those who value traditional aesthetics and the ability to explore shallow estuaries without the cost of a deep-water mooring. It is a sturdy, honest vessel that prioritizes safety over speed.
Pros:
- Excellent stability and the ability to dry out on its bilge keels.
- Inexpensive to maintain and easy to trailer with a standard vehicle.
- Robust construction that handles coastal chops better than modern dinghies.
Cons:
- Lacks the performance and pointing ability of fin-keeled competitors.
- Cramped interior for more than two adults.
- The aging GRP and hardware require a diligent maintenance schedule.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Twin
- Rudder
- 1x —
- Ballast
- 699 lbs (Lead)
- Displacement
- 1592 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 18.27 ft
- Waterline Length (LWL)
- 16.24 ft
- Beam
- 9.51 ft
- Draft
- 2.36 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 154 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 18.07
- Ballast / Displacement Ratio
- 43.91
- Displacement / Length Ratio (D/L) Ratio
- 165.93
- Comfort Ratio
- 7.27
- Capsize Screening Formula
- 3.26
- Hull Speed
- 5.4 kn