Design Brief & Intent
The Moonfleet 36 was designed from the outset as a rugged, go-anywhere blue-water cruiser, with a specific focus on long-term liveaboard comfort and warm-weather voyaging. During the late 1980s, the cruising market was increasingly dominated by production line options from mass-market builders. Hillyard and Laurent Giles sought to counter this trend by offering a boat of immense structural integrity. They built the solid isophthalic laminate hull to a standard that exceeded Lloyd's specifications, ensuring the vessel could withstand severe offshore conditions.
Inside, the joinery reflects Hillyard's legendary heritage of cabinetmaking. Instead of the modular, drop-in fiberglass liners typical of mass-production boats, the Moonfleet 36 interior was hand-fitted with a beautiful blend of mahogany, American oak, and maple. The layout features the classic three-cabin arrangement pioneered by David Hillyard decades prior. It locates a highly insulated engine space directly under the center cockpit, separating the comfortable main saloon and U-shaped seating area from a private, dedicated aft stateroom. With two separate heads, a secure sea-going galley, and an integrated chart table, the boat was designed to function as a genuine home on the water for a cruising couple or a small family.
Variations & Configurations
While some historical design databases record the Moonfleet 36 as having a traditional, full-length keel, the underwater profile of actual production examples reveals a highly deliberate design choice by Laurent Giles. The boat utilized a semi-long, encapsulated cast-iron keel arrangement that worked in tandem with a partial skeg-supported, balanced rudder. This hybrid design retains the directional tracking and propeller protection of a traditional full keel while greatly reducing wetted surface area and improving maneuverability in tight harbors.
The rig is configured as a robust, high-aspect masthead sloop, which provides a simple and easily managed sail plan for short-handed couples. The center-cockpit layout is deeply recessed and secure, featuring full-length teak seats and a dry, protected command position. Most models were built with a draft of 5.25 feet, strike a balance between deep-water stability and the ability to navigate shoal-draft cruising grounds.
Sailing Performance & Handling
The physical implications of the Moonfleet 36's design parameters are immediately apparent at the helm. With a displacement-to-length ratio of 319.37, the boat sits firmly in the heavy cruiser category. She carries her 17,000-pound displacement with immense momentum. In a seaway, this heavy-displacement profile allows the hull to punch through chop and head seas without slamming, maintaining a comfortable and predictable motion. The motion is further smoothed by a comfort ratio of 30.2, which indicates a slow, gentle roll rate that significantly reduces crew fatigue on multi-day passages.
The vessel’s stiffness and windward capability are backed by a ballast-to-displacement ratio of 41.18 percent. Because more than 40 percent of her weight is concentrated in the iron ballast, the Moonfleet 36 is incredibly stiff. She stands up to her canvas beautifully, allowing the crew to maintain full sail in conditions that would force lighter, modern production cruisers to reef early. For ultimate ocean safety, her capsize screening ratio of 1.91 sits comfortably below the critical 2.0 threshold, mathematically verifying her resistance to roll-overs in survival conditions.
However, this heavy profile has its trade-offs. In light winds, the Moonfleet 36 can feel sluggish and slow to accelerate. The auxiliary propulsion is therefore a critical component of her handling. The standard 43-horsepower Perkins engine provides the necessary muscle to push this heavy hull through doldrums and strong head currents.
Market Snapshot & Economics
Given that only a handful of Moonfleet 36 models were ever constructed, the vessel is an exceptionally scarce find on the brokerage market. It does not carry the instant, mass-market brand recognition of same-era builders like Moody or Westerly, but it commands a premium among discerning buyers who understand its pedigree. The boat typically trades at a competitive value compared to premium Scandinavian yachts of the same vintage, offering comparable construction standards and woodwork at a lower entry cost.
Prospective owners must approach a Moonfleet 36 with a clear understanding of "orphan boat" economics. Because the builder is no longer active and so few hulls exist, there is no factory support, dedicated parts inventory, or large owner association to consult. Upkeep and refits rely heavily on standard equipment of the era and custom fabrication. While the hull and deck are structurally overbuilt, buying a neglected specimen can quickly become a financial trap. If rainwater has been allowed to sit in the bilge or leak through deck fittings, the cost of restoring the bespoke, hand-crafted interior joinery can easily exceed the market value of the vessel, occasionally relegating neglected hulls to salvage yards.
Known Issues & Triage
The Moonfleet 36 has several specific areas that demand inspection and preventative maintenance:
- Deck Core Moisture: The deck was built using a conventional balsa wood sandwich. Over decades, the bedding compound under stanchion bases, cleat fasteners, and chainplates will dry out and crack. Any water intrusion into the balsa core will lead to rot and delamination, presenting as soft spots on deck that require labor-intensive skin removal and recoring.
- Keel Joint Sealing: On models utilizing the bolted cast-iron keel configuration, the stainless steel keel bolts and the joint interface must be carefully monitored. Over time, minor flexing can breach the keel-to-hull sealant, leading to weeping or crevice corrosion of the bolts. Re-bedding the keel is a recommended triage routine for boats that have not had this service completed in the last two decades.
- Propeller and Drivetrain Matching: Many owners have reported that the original drivetrain matching was less than optimal. The Perkins engine was frequently paired with a Hurth gearbox and a large, unusually shallow-pitched propeller. This can result in poor motoring efficiency, excessive engine RPM at cruising speeds, and significant prop walk in reverse.
Modernization & Upgrades
Modern owners of the Moonfleet 36 have focused on updating the boat's systems to match contemporary liveaboard expectations:
- Propeller Optimization: To address the original shallow-pitch propeller issues, veteran owners have successfully transitioned to modern feathering propellers, such as a 19-inch feathering unit. This upgrade dramatically reduces drag under sail—often adding half a knot or more of boat speed in light conditions—and greatly improves reverse thrust and control when maneuvering in tight marinas.
- Repowering: While the original Perkins engines are famously reliable, those looking for modern reliability often replace them with modern, lightweight diesel engines. A 43-to-50 horsepower modern marine diesel fits easily into the spacious engine room, offering cleaner operation, reduced vibration, and simplified maintenance.
- Electrical System Redesign: The cavernous storage spaces and solid carrying capacity make the Moonfleet 36 an excellent candidate for off-grid power upgrades. Owners regularly replace the outdated lead-acid battery banks with high-capacity lithium iron phosphate (LiFePO4) systems, supported by solar arrays mounted on custom stern gantries and modern marine wind generators.
The Verdict
The Moonfleet 36 is a rare masterpiece of late-era British yacht building. It is a boat designed for the cruiser who prioritizes safety, heavy-weather comfort, and hand-crafted luxury over flat-out racing speed. While its scarcity makes finding one a challenge, those lucky enough to secure a well-maintained model will possess a highly capable, exceptionally stiff blue-water voyager that turns heads in any harbor.
Pros
- Exceptional hull strength, built to standards exceeding Lloyd's specifications.
- Exquisite, hand-crafted interior joinery with mahogany, oak, and maple.
- High ballast-to-displacement ratio ensures a very stiff and safe sailing profile.
- Highly comfortable motion in heavy seas, minimizing crew fatigue.
- Excellent privacy provided by the classic three-cabin, center-cockpit layout.
Cons
- Extremely rare model with virtually no factory or dedicated community support.
- Sluggish performance in light winds due to heavy displacement.
- Susceptible to costly balsa core deck rot if hardware is not regularly re-bedded.
- Original propeller matching often requires upgrading to resolve motoring inefficiencies.
