Design Brief & Intent 2
Developed by Auckland’s Sea Nymph Boats (which later became McDell Marine) and engineered with input from Russell Bowler, the Farr 740 Sport was conceived as a high-performance one-design racer-cruiser. Its core mission was to deliver thrilling off-the-wind speeds while maintaining class competitiveness under Junior Offshore Group (JOG) rating rules. Unlike contemporary competitors of its era, which often prioritized interior standing headroom and heavy displacement, the 740 Sport was engineered to behave like an oversized racing dinghy 4.
The interior construction of the boat exemplifies this philosophy. Rather than utilizing heavy marine plywood bulkheads, Sea Nymph engineered a sophisticated fiberglass floor liner that was glued and glassed directly to the hull. This liner acted as a structural space-frame, providing immense rigidity while keeping the hull’s dry weight to an absolute minimum. Inside, the joinery and overall fit-out are sparse but highly functional, featuring molded-in berths and basic storage lockers. The layout provides four berths—with the forward V-berth convertible into a double—a small galley unit with a sink, and a private toilet area forward of the bulkhead. A sliding main hatch with an integrated pop-top mechanism is a standout feature, allowing owners to enjoy genuine standing headroom at anchor, while the signature dark, wrap-around plexiglass cabin window provides an expansive, bright feel below.
Variations & Configurations
Though the Farr 740 Sport adhered to strict one-design class rules during its production run, notable variations exist depending on the build origin and subsequent class-sanctioned modifications. The primary builder, Sea Nymph in New Zealand, constructed the vast majority of the fleet. However, the design was also produced under license in Italy by Plastivela. The Italian-built boats diverged from the New Zealand standard, featuring a more conventional deck layout with individual portlights instead of the wrap-around plexiglass windshield, and were occasionally fitted with small, lightweight inboard diesel engines—such as the Yanmar 1GM10 sail-drive—rather than the standard transom outboard bracket.
The most significant variation across the global fleet lies in the sailing rig. The original design utilized an inline fractional Sloop rig with a highly adjustable, twin-spreader mast supported by running backstays and checkstays 5. This configuration offered precise mast-bend and forestay-tension control for racing but required a highly coordinated crew during maneuvers. In response to owners desiring easier short-handed handling, the class association later permitted a rig variation featuring swept-back spreaders and a conventional permanent backstay, allowing for the complete removal of the running backstays.
Beneath the waterline, all models share the same high-aspect lifting keel. This vertically telescoping daggerboard houses the majority of the boat's ballast and retracts fully into the hull’s centerboard casing, reducing the draft to a mere 0.92 feet for effortless trailering and shallow-water beaching. When fully lowered to its deep draft of 5.58 feet, the keel transforms the flat-bottomed sportboat into an incredibly weatherly, high-pointing racer.
Sailing Performance & Handling
The physical behavior of the Farr 740 Sport is defined by its highly competitive design ratios. With a sail area-to-displacement ratio of 19.77, the boat is remarkably well-powered. It responds instantly to light puffs of wind, accelerating with a degree of sensitivity usually reserved for high-performance dinghies. Because the hull features a very flat, planing-oriented underbody, the boat easily breaks free from its bow wave and planes when sailed off the wind in a breeze.
Its displacement-to-length ratio of 130.17 categorizes it as a modern, light-displacement craft. It carries enough momentum to glide smoothly through tacking angles and wind lulls, unlike some ultra-light modern sportboats that lose speed the moment the sails stall. At the helm, the boat is balanced and highly tactile, offering immediate feedback to the driver.
However, its trailerable, shallow-bodied design carries distinct physical trade-offs. The boat's capsize screening ratio of 2.27 highlights that it lacks the ultimate self-righting capability of a deep-keeled, heavy-displacement offshore yacht. While the 27.57% ballast-to-displacement ratio provides decent stiffness once the boat heels and the hull's form stability takes over, sailing in heavy weather demands careful sail trim, active crew weight on the deck, and absolute vigilance in locking the lifting keel in the down position. The comfort ratio of 12.55 confirms that the 740 Sport is a lively motion platform; it will ride over waves rather than slice through them, resulting in a wet, bouncy, yet exhilarating ride in a chop.
Known Issues & Triage
As these hulls have aged, several model-specific structural and mechanical vulnerabilities have become well-known among class veterans. The most critical system requiring close inspection is the lifting keel mechanism. The heavy 827-pound keel relies on a stainless steel cable, a manual or electric winch, and a primary pivot-and-guide assembly within the centerboard trunk. If the lifting cable is not replaced regularly, or if the winch's locking mechanism fails, the keel can drop catastrophically, fracturing the internal casing and threatening the hull's integrity. Owners must ensure the keel's locking pin is engaged whenever the boat is under sail.
Furthermore, because these boats were designed to be pushed hard in competitive club racing, the centerboard casing itself is a known stress point. Hairline cracks or structural flexing where the casing integrates with the inner fiberglass floor liner can develop over time, particularly on boats that have suffered hard groundings or decades of high-load racing. Triage requires grinding back the fiberglass around the trunk and reinforcing the area with heavy biaxial laminate and epoxy.
The composite hull and deck layup can also present issues. While the Klegecell foam core in the deck and the Coremat in the hull provide exceptional stiffness, they are vulnerable to delamination if water penetrates the laminate. The most common entry points are around poorly sealed deck organizers, winches, and the chainplates. Any soft spots in the deck must be addressed by drilling, drying the core, and executing a localized epoxy-infusion refit. Additionally, the original wrap-around dark acrylic windshield is highly prone to crazing, cracking, and chronic leaking if the original bedding compound has degraded.
Modernization & Upgrades
A strong global owner association and a dedicated community have kept the Farr 740 Sport relevant through targeted modernization. One of the most popular retrofits involves converting the original inline rig to a swept-back spreader configuration. This modification entails shifting the side stay chainplates aft by roughly 375 millimeters and reinforcing the hull internally at the new mounting points. By doing so, owners can permanently eliminate the running backstays, drastically simplifying short-handed tacking and gybing without sacrificing the rig's structural safety.
Auxiliary power is another area where modern owners are making significant changes. The original heavy, polluting two-stroke outboards are increasingly being replaced by clean, lightweight alternative propulsion. Many owners have successfully retrofitted electric outboards powered by lithium iron phosphate battery banks. Because the boat is inherently light and easily driven, a modern electric outboard provides ample power for harbor maneuvering, while the lightweight lithium batteries can be tucked low in the salon lockers, preserving the boat’s sailing trim and reducing trailering weight.
Additionally, manual keel winches are frequently upgraded to 12-volt electric winches equipped with wireless remote controls. This upgrade makes raising and lowering the heavy keel an effortless, push-button operation, which is highly appreciated when navigating shallow ramps or narrow channels. Finally, replacing the aging, leaking acrylic wrap-around windshield with modern, UV-stabilized polycarbonate panels bonded with structural polyurethane sealants has become a standard project to modernize the boat’s exterior lines and ensure a dry interior.
The Verdict
The Farr 740 Sport remains one of the most compelling performance trailer-sailors of its era. It represents a highly successful marriage of Bruce Farr’s early racing genius and Sea Nymph’s advanced composite construction 1. For sailors who prioritize pure performance, tactical helm feedback, and the ability to plane downwind over interior luxury, this classic trailer yacht has few equals. It requires an active, attentive crew to sail it to its full potential, but rewards them with speeds that can embarrass much larger modern keelboats. While it demands rigorous maintenance of its lifting keel and rig, it stands as an evergreen testament to the era when trailer-yachting was fast, raw, and incredibly fun.
- Pros:
- Exhilarating off-the-wind performance with genuine planing potential in a breeze.
- Extremely stiff and light construction utilizing advanced foam and coremat composites.
- Lifting keel allows a draft of under one foot for effortless trailering and beaching.
- Large, highly ergonomic cockpit optimized for active racing crews.
- Active class associations and a strong cult following provide excellent support and parts knowledge.
- Cons:
- High-maintenance lifting keel mechanism requiring regular inspection to prevent catastrophic drops.
- Low ultimate righting moment demands constant vigilance and locking the keel when under sail.
- Running backstays on original rigs complicate short-handed sailing and require conversion or active crew work.
- Minimalist interior with limited headroom and amenities compared to pure cruising trailer-sailors.
- Aging foam-cored decks and hull structures require careful inspection for moisture ingress.
