Design Brief & Intent
The Trac 18 was conceived as the flagship of AMF Alcort’s tiered catamaran lineup, which also included the solo-oriented Trac 14 and the deep-V-hulled Trac 16. While the smaller sisters sacrificed some sailing angle for simplicity, the Trac 18 was engineered for maximum performance. To achieve this, the Hubbards chose a symmetrical hull profile utilizing twin retracting centerboards. This was a direct counter-strategy to the dominant asymmetrical-hulled beach cats of the era, which relied on hull shape alone to prevent leeway.
As a beach cat, the "interior" is entirely defined by its outdoor deck space. The boat features an expansive, high-tension trampoline mesh bounded by robust aluminum crossbeams. The fit-out was designed to minimize clutter; halyards, sheets, and control lines were run cleanly to allow the helmsman and crew to focus on weight distribution and sail trim. While mass-production builders of the era often skimped on hardware, AMF outfitted the Trac 18 with high-quality blocks and a heavy-duty anodized aluminum rotating mast.
Sailing Performance & Handling
The physical numbers of the Trac 18 translate directly to an athletic, high-adrenaline experience on the water. With an empty displacement of just 349 pounds, the boat is exceptionally light for its 18-foot length overall. When paired with its generous 233 square feet of sail area, the boat boasts an astronomical sail area-to-displacement (SA/Disp) ratio of 75.2. This extreme ratio makes the Trac 18 incredibly responsive in light air and capable of immediate acceleration and hull-flying action in moderate breezes.
The displacement-to-length (D/L) ratio of 29.07 puts the boat firmly in the ultra-lightweight racing category. Downwind, the rotating fractional sloop rig allows the mainsail to present a clean aerodynamic profile, driving the boat to planning speeds with ease. The capsize screening ratio of 4.55 and a comfort ratio of 1.91 underscore its physical reality: this is a highly unstable, wet, and demanding platform that requires active sheet-ease and crew weight adjustment on the trapeze to keep the mast pointing skyward. However, the twin centerboards give the Trac 18 an outstanding upwind pointing advantage over boardless catamarans, biting deep into the water to minimize leeway.
Market Snapshot & Economics
With only approximately 100 units built during its brief production run in the early-to-mid-1980s, the Trac 18 is a rare find today. On the brokerage market, it trades as a high-value, low-cost entry into high-performance catamaran sailing. It does not command the collector premium of a classic Hobie, primarily because of its scarcity and the lack of a standardized class racing association.
For modern buyers, the economics of purchasing a Trac 18 are heavily weighted toward refit costs rather than the initial purchase price. Finding a hull in sailable condition is rare; most will require a complete replacement of the trampoline, running rigging, and sails. Because specialized parts are no longer manufactured, buyers must be prepared to source generic catamaran hardware or fabricate custom solutions.
Known Issues & Triage
The primary technical failure point of the Trac 18 lies in its fiberglass hulls. Over decades of high-stress sailing, the hulls can develop delamination and "soft spots," particularly on the decks forward of the front crossbars and along the sides of the hulls where crew weight is repeatedly concentrated.
The twin centerboard trunks are another high-wear area. Years of beaching or hitting submerged obstacles can crack the fiberglass trunks, leading to slow water intrusion into the hulls. Buyers must inspect the trunk interiors and the lower lips for stress fractures and ensure the pivoting centerboard mechanisms operate smoothly.
Additionally, "racking"—where the hulls move independently of each other due to play in the aluminum crossbar connections—is common in older boats. This requires tightening or rebuilding the hull-to-beam connection plates to restore torsional stiffness.
Modernization & Upgrades
Veteran owners of the Trac 18 have kept these vintage racers alive through targeted upgrades. The most critical modernization is the replacement of the original heavy vinyl trampoline with a modern, high-grade polypropylene mesh trampoline. These modern trampolines shed water faster, reduce aerodynamic drag, and provide a much firmer platform for the crew.
The running rigging is also ripe for upgrades. Replacing old wire-to-rope halyards with modern Dyneema lines reduces weight aloft and eliminates wire meat-hooks. Splicing in a modern 8:1 or 10:1 mainsheet block system greatly reduces the physical effort required to trim the high-roach mainsail. Lastly, because original rudder blades are prone to chipping and fatigue, many active sailors retro-fit aftermarket fiberglass or carbon-composite kick-up rudder blades for improved helm feel and durability.
The Verdict
The AMF Trac 18 is a brilliant but obscure chapter in beach catamaran history, offering C-Class-inspired performance at an affordable price point. It is best suited for experienced multihull sailors who appreciate technical sailing and do not mind the DIY demands of maintaining a rare vintage boat.
Pros
- Astronomical sail area-to-displacement ratio delivers thrilling acceleration and high top speeds.
- Symmetrical hulls and twin centerboards provide superior upwind pointing compared to boardless catamarans.
- Ultra-lightweight construction makes it easy to trailer, hand-launch, and beach.
- Rotating mast maximizes aerodynamic efficiency downwind.
Cons
- Extremely rare model with virtually no factory support or class-specific replacement parts.
- High physical demands and low comfort ratio guarantee a wet, athletic ride.
- Older hulls are highly susceptible to delamination, soft spots, and structural racking.
- Lacks the active class racing fleets enjoyed by contemporary beach cats.
