Sailing Performance & Handling
The sailing characteristics of the Thompson 590 are defined by its ability to transition into a plane with minimal effort. With a displacement often hovering around 500kg to 550kg—nearly half of which is concentrated in the keel bulb—the boat possesses a stiffness that belies its small size. On the wind, the T590 tracks with a high degree of sensitivity; the large high-aspect rudder provides immediate feedback, though it requires a delicate touch to avoid over-steering in gusty conditions.
The true nature of the T590 is revealed on the downwind legs. Utilizing a retractable carbon bowsprit, the boat carries a massive asymmetric spinnaker that generates significant apparent wind. In a breeze exceeding 12 knots, the hull is designed to break free from its bow wave and plane, often reaching speeds in the mid-to-high teens. This performance is a direct result of the hull’s flat aft sections and the meticulous weight distribution encouraged by Steve Thompson’s design. According to technical insights from T-Boat Designs, the 590 was specifically engineered to offer "grand prix" levels of performance in a package that could be managed by a crew of three, making it a favorite for competitive club racing and sports boat regattas in Australasia and North America.
Known Issues & Buyer’s Checklist
Prospective owners of a Thompson 590 should approach the purchase with a "racing inspection" mindset, as these boats are often pushed to their structural limits.
- Keel Box Integrity: Because the T590 is designed for high-speed planing and features a heavy bulb on a relatively thin foil, the keel box is a primary point of stress. Buyers should inspect the transverse floors and the junction where the keel box meets the hull for spiderweb cracking or signs of movement, which can indicate structural fatigue from grounding or extreme loads.
- Deck Compression: The mast step and high-tension rigging points can suffer from compression if the core material (often foam or balsa in various builds) has been compromised. Check for soft spots around the mast base and the chainplates.
- Rudder Gudgeons and Transom: The high loads generated by the deep rudder when the boat is planing at 15+ knots place immense strain on the transom. Inspect the gudgeon mounts for any backing plate deformation or cracking in the laminate.
- Keel Lifting Mechanism: The T590 uses a winch or crane system to retract the keel for trailering. The integrity of the lifting pin and the stainless steel cable should be verified, as corrosion in these components can lead to a dangerous failure during launch or recovery.
The Verdict
The Thompson 590 remains a benchmark for sailors seeking raw speed and technical engagement without the logistical overhead of a larger yacht. It is a purist’s sports boat that rewards skilled trimming and aggressive tactics.
Pros
- Exceptional Speed: Capable of outperforming boats twice its size in reaching and downwind conditions.
- Trailability: The retractable keel and light weight make it easy to transport to various regattas with a standard passenger vehicle.
- Design Pedigree: Benefit from the high-performance innovations of Steve Thompson, a leader in the sports boat movement.
Cons
- Demanding Handling: Not suitable for beginners; requires a crew capable of managing high-speed asymmetric maneuvers.
- Minimal Comfort: Lacks any interior amenities, making it strictly a day-racer or "adventure" daysailer.
- Maintenance Intensive: High-performance hardware and composite construction require regular oversight and replacement of running rigging.
