MacWester 28 — Information, Review, Specs

CSJ Roy·1967·Macwester Marine Co. Ltd.
MacWester 28 drawingBuilder drawing
Hull type
Monohull · twin
Rig
Masthead Sloop
LOA
28.25' · 8.61 m
Displ.
7,286 lbs · 3,305 kg
First year
1967

The MacWester 28 is a quintessential British heavydisplacement cruiser that represents the evolution of C.S.J. Roy’s "go anywhere, sit anywhere" design philosophy. Launched in 1967 as a larger, refined version of the foundational MacWester 26, the 28 was built by the Macwester Marine Co. Ltd. to offer growing families a robust alternative with significantly more interior volume and improved seakeeping. While primarily associated with the traditional twin bilge keel configuration, the model was also produced under the Atlanta Marine banner as the Atlanta 28, following the sale of production rights. This model is technically a "stretched" variant of the MacWester 26, sharing the same hull and coachroof profile but featuring an elongated lazarette and a taller masthead rig to handle its increased displacement.

Measurements

Dimensions 01

LOA
28.25 ft
LWL
22.5 ft
Beam
9.25 ft
Draft
2.75 ft
Max headroom
-
Air draft
-

Construction & hull 02

Construction
Fiberglass
Hull type
Monohull
Keel type
Twin
Rudder
1× —
Ballast
2265 lbs
Displacement
7286 lbs
Water
20 gal
Fuel
18 gal

Rig & sails 03

Rig type
Masthead Sloop
P · main luff
-
E · main foot
-
I · fore ht.
-
J · fore base
-
Forestay (est)
-
Sail area
330 sqft

Calculations 04

SA/D ratio
14.05
Ballast/Disp.
31.09
D/L ratio
285.56
Comfort ratio
24.01
Capsize screening
1.91
Hull speed
6.36 kn

Sailing Performance & Handling

The MacWester 28 is defined by its substantial displacement-to-length (D/L) ratio of approximately 285, categorizing it firmly as a heavy cruiser. With a sail area-to-displacement (SA/D) ratio of roughly 14.1, the boat is notoriously underpowered in light airs, often requiring the "iron staysail" (engine) to maintain progress against tides. However, in heavier conditions, its stability becomes its greatest asset. The masthead sloop rig is simple and carries its sail area low, resulting in a modest heeling moment that makes for a safe, predictable experience for novice sailors.

Owners and editorial reviews in Yachting Monthly note that while it is no racing machine, it "sails quite well" for its weight, benefiting from a taller rig than its smaller predecessor. Tracking is generally reliable due to the lateral resistance provided by the twin keels, though some owners have noted that the rudder can feel slightly undersized relative to the underwater profile in high-wind conditions. Its motion is described as "sea-kindly" with a Comfort Ratio of 24.0, which is high for a vessel of this length, ensuring a less fatiguing experience during choppy coastal passages.

Interior Comfort & Variations

The "tardis-like" interior of the MacWester 28 is its primary selling point. Designed for family cruising, it typically offers five berths across two cabins. The layout includes a split V-berth in the forecabin, a central saloon with a dinette that converts to a double berth, and a practical quarter berth to port. Unlike the smaller 26, the 28 provides more breathing room in the galley and a dedicated chart table, alongside an enclosed heads compartment.

The hull served as the foundation for several notable variations. The MacWester 28 Wight Class was a center-cockpit version that emphasized motor-sailing comfort and occasionally featured a ketch rig. When Atlanta Marine took over production, they marketed the boat as the Atlanta 28, which was often sold in kit form. These kit-built models can vary significantly in finish quality compared to the "factory" MacWester hulls. Later, the design was further evolved into the MacWester 30, which lengthened the hull further to accommodate even more generous living quarters.

Known Issues & Buyer’s Checklist

  • Osmotic Blistering: Like many British GRP boats built in the late 1960s and 1970s, the MacWester 28 is prone to osmosis. While rarely structural in these over-built hulls, a moisture meter test and visual hull inspection are essential.
  • Keel Bolt Integrity: For twin-keel models kept on drying moorings, the repeated stress of taking the ground can strain the keel-to-hull joint. Buyers should inspect the bilge for "weeping" at the bolts or signs of rust, as crevice corrosion in stainless studs is a known risk in oxygen-starved, damp environments.
  • Engine Aging: Many original units were fitted with Volvo MD2B or early Beta engines. Prospective buyers should check for cooling system blockages and exhaust elbow corrosion, which are common in these older diesel units.
  • Small Rudder Performance: Some owners have reported that the rudder is somewhat small for the boat's lateral profile, leading to reduced maneuverability in tight quarters or under heavy weather helm.
  • Kit-Build Variations: For boats labeled as "Atlanta 28," it is vital to verify if it was a factory-finished hull or a DIY kit. Poorly executed owner-fitted interiors or secondary bonding of bulkheads can lead to structural creaking or misaligned rigs.

Community & Resources

The primary hub for technical support is the Macwester Owners Association, which maintains an extensive technical library including original design notes from C.S.J. Roy and specific maintenance guides for the 28 and Wight variants. The community is particularly active in the UK, where the boat’s ability to use tidal moorings remains a significant economic advantage.

The Verdict

The MacWester 28 is a sturdy, "belt-and-braces" cruiser that prioritizes safety and space over speed. It is an ideal entry-level yacht for sailors who prefer a stable, upright experience and the ability to explore shallow, tidal estuaries.

Pros:

  • Exceptional interior volume for a 28-foot vessel.
  • Stable and forgiving motion in heavy weather.
  • Twin keels allow for low-cost drying moorings.
  • Extremely robust GRP construction.

Cons:

  • Relatively poor light-wind performance and pointing ability.
  • Common occurrences of osmosis in older hulls.
  • Original engines are often at the end of their service life.
  • Rudder can feel undersized in demanding conditions.

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