Ultimate 27 Information, Review, Specs

Sailing Performance & Handling

The sailing philosophy of the Ultimate 27 is defined by its impressive power-to-weight ratio and a highly specialized rig. With a displacement-to-length (D/L) ratio of approximately 86.6 and a sail area-to-displacement (SA/D) ratio nearing 30.0, the boat is a prototypical "light air flyer" that transitions into a planing machine as the breeze builds. In his technical analysis for boats.com, naval architect Bob Perry noted that the boat utilizes a "big, dinghy-style rig" with swept-aft spreaders at a 28-degree angle, which eliminates the need for a backstay and allows for a massive, high-roach mainsail.

Handling is further enhanced by two distinct technical features: a 1,050-pound lead bulb on a retractable carbon fiber fin and a patented articulating bowsprit. The bowsprit can be swung 30 degrees to either side from the cockpit, allowing the crew to sail deeper angles with the asymmetric spinnaker than a traditional fixed-pole sportboat. Owners frequently report that the boat feels "locked in" when reaching, often hitting double-digit speeds with ease, though the lack of a backstay requires careful attention to rig tension and forestay sag via the adjustable headstay system.

Interior Comfort & Variations

While the Ultimate 27 is unashamedly a performance-first vessel, it offers a "sit-down" interior that is surprisingly functional for its class. The layout was designed to integrate the structural keel trunk into the furniture, creating a central hub that serves as a divider for the living space. It features a V-berth forward, beneath which a chemical head is typically housed, and two quarter berths that extend aft.

Material choices are spartan, prioritizing weight savings; however, Antrim Design highlights that there is enough room to sit bolt upright under the house, a luxury not often found in 27-foot ULDBs (Ultra-Light Displacement Boats). While most units were built in fiberglass, a later "Carbon Antrim 27C" variant was developed, utilizing a full carbon fiber skin on a foam core to further reduce weight and increase stiffness for professional-level offshore campaigns.

Popular Mentions & Media

The Ultimate 27 has carved out a niche in the shorthanded and offshore racing world. It is a perennial favorite in West Coast distance races, particularly the Pacific Cup, where its ability to plane for days on end makes it a formidable competitor in the "Doublehanded" and "Small Boat" divisions. The boat gained additional notoriety in the San Francisco sailing scene, particularly through its performance in the "Three Bridge Fiasco," where its maneuverability and light-air prowess allow it to navigate the bay's complex currents more effectively than heavier traditional designs.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on the unique mechanical and structural systems that allow the Ultimate 27 to perform at its peak.

• Keel Lift Mechanism: The retractable fin keel relies on a winch and cable system. Inspect the cable for fraying and the winch for corrosion, as the keel trunk is a high-moisture area.
• Rigging Tension: Because the design lacks a backstay, the mast depends entirely on spreader sweep and shroud tension for stability. Aluminum masts are particularly prone to "pumping" if the rig is not tuned to the specific tensions recommended by the designer.
• Headstay Sleeve: Many models use a "zip-the-luff" jib system over a roller furler. While aerodynamically efficient, these sleeves can become difficult to operate if salt or grime builds up, and they are prone to UV damage.
• Rudder Gudgeons: The boat uses a "gudgeonless" transom attachment. Check the carbon fiber rudder blade and the transom mounting points for stress cracks, especially on boats that have been campaigned heavily offshore.
• Deck Core: Like many cored boats of the 90s, check for soft spots around high-load deck hardware, such as the articulating sprit track and the primary winches.

Community & Resources

The primary hub for technical support is the Antrim 27 Class Association, which maintains tuning guides and sail plans. Additionally, Antrim Design remains an active resource for owners seeking structural specifications or information on the newer carbon variants. The boat also shares a deep community connection with the Ultimate 20 and Ultimate 24 fleets, often participating in "Ultimate" regattas on the West Coast.

The Verdict

The Ultimate 27 is a "sailor's sailboat" that rewards technical skill and aggressive driving with exhilarating performance. It is a rare example of a sportboat that can actually handle blue water, provided the crew is prepared for a wet, physical ride.

Pros:

• Exceptional light-air performance and easy planing in moderate breeze.
• Retractable keel makes it trailerable and capable of reaching shallow anchorages.
• The articulating bowsprit offers superior tactical options when sailing downwind.
• Higher build quality and structural reinforcement compared to many 90s-era sportboats.

Cons:

• Minimal interior headroom and amenities; not suitable for extended family cruising.
• The absence of a backstay can be unnerving for sailors transitioning from traditional cruisers.
• The articulating sprit and spinnaker gear create a relatively cluttered foredeck.