Thompson 27 Information, Review, Specs

Sailing Performance & Handling

The Thompson 27 is defined by its exceptionally high power-to-weight ratio. With a displacement that typically hovers around 1,500 to 1,800 kg (depending on the specific build and carbon content), the boat is designed to plane in as little as 10 to 12 knots of true wind speed. The hull features a fine entry to pierce chop, transitioning into a wide, flat aft section that provides the lift necessary for high-speed surfing. According to technical overviews of the T-Boat range, the T27 utilizes a high-aspect-ratio rig and an oversized asymmetric spinnaker flown from a long, retractable carbon fiber bowsprit.

Handling is characterized by extreme responsiveness, bordering on the sensitive. Because the boat relies on a deep-draft lead bulb for stability, it tracks well upwind compared to lighter dinghy-style sportsboats, but it truly comes alive off the wind. Owner reports and race data often highlight the boat’s ability to reach speeds in excess of 20 knots. The steering is typically fingertip-light thanks to a balanced spade rudder, though sailors must be diligent with weight placement; keeping the bow up while planing is critical to avoiding "tripping" in heavy seas.

Interior Comfort & Variations

True to its sportsboat pedigree, the interior of the Thompson 27 is spartan and focused on weight distribution rather than luxury. The cabin is primarily intended for sail storage and short-term coastal "camping" rather than extended cruising. Most configurations feature four basic berths—two settee berths in the main cabin and two pipe cots or quarter berths aft. Headroom is limited, as the low-profile coachroof is designed to minimize windage and keep the center of gravity low.

Variations of the Thompson 27 are common, as Steve Thompson often allowed for custom tweaks during the construction phase at various yards. The T850 variant is the most common "sibling," often considered the refined version of the original 27-foot hull. Other siblings in the lineage include the smaller Thompson 7 and the more modern T8, which utilized more advanced composites to reduce weight further. Some versions of the 27 were built with a fixed keel for dedicated club racing, while the "Trailable" versions featured a vertical lifting keel that allowed the boat to be ramp-launched and towed behind a standard SUV.

Popular Mentions & Media

The Thompson 27 has a storied history in the "Bay of Islands Sailing Week" in New Zealand and various "Race to Alaska" (R2AK) qualifiers, where its speed-to-size ratio makes it a perennial favorite. While not a "blue water" cruiser, the model has gained a cult following on YouTube and sailing forums for its spectacular "wipeout" videos and high-speed footage, showcasing the inherent risks and rewards of the sportsboat genre. The design was featured in numerous New Zealand boating publications during the late 1990s and early 2000s as the benchmark for the "8.5-meter" box rule racing class.

Known Issues & Buyer’s Checklist

Prospective buyers of a pre-owned Thompson 27 should focus their inspection on the high-load areas inherent to sportsboats:

• Keel Trunk Integrity: On models with a lifting keel, the trunk and the locking mechanism are subject to significant lateral stress. Inspect for stress cracking around the trunk base and ensure the lifting winch or hydraulic system is serviced.
• Chainplate Reinforcement: The high-tension rig of the T27 puts immense pressure on the chainplates. Check for crazing in the gelcoat or signs of deck deflection where the shrouds meet the hull.
• Core Moisture: Many Thompson 27s were built using foam or balsa cores to save weight. Use a moisture meter to check the deck, especially around retrofitted hardware like newer winches or cam cleats.
• Rudder Bearings: Given the speeds this boat achieves, the rudder bearings wear faster than on a standard cruiser. Any "play" or vibration in the tiller at high speed usually indicates the need for bearing replacement.
• Carbon Mast Fatigue: If equipped with a carbon rig, inspect the mast track and the areas around the spreaders for any signs of longitudinal cracking or UV degradation of the resin.

Community & Resources

Owners of the Thompson 27 often congregate within broader sportsboat associations. The New Zealand Sport Boat Association remains the primary technical resource for the T27 and T850, providing class rules and tuning guides. In North America, the Pacific Northwest Sportsboat Fleet is a common hub for Thompson owners, offering a repository of knowledge regarding trailer modifications and sail plan optimizations for various PHRF ratings.

The Verdict

The Thompson 27 is an uncompromising speed machine that offers one of the most exhilarating sailing experiences available in the sub-30-foot category. It is not a boat for the casual cruiser or the faint of heart, but for the competitive sailor looking to hunt "big game" on the racecourse, it remains a formidable weapon.

Pros:

• Blistering off-the-wind performance with easy planing.
• Retractable keel allows for easy trailering and access to shallow anchorages.
• Large cockpit optimized for efficient crew maneuvers.

Cons:

• Minimal interior amenities; unsuitable for family cruising.
• High physical demand on the crew during heavy-air maneuvers.
• Requires frequent maintenance of high-load hardware and rigging.