Swan 50 MS Information, Review, Specs

Make
Swan
Model
50 MS
Builder
Nautor
Designer
Sparkman & Stephens
Number Built
9
Production Year(s)
1976 - ??

The Swan 50 MS (Motor Sailer) stands as a rare and intriguing outlier in the historical portfolio of Nautor’s Swan. Designed by the legendary firm of Sparkman & Stephens as Design No. 2007, this model represents a specific moment in the early 1970s when the yard explored the intersection of high-end yacht construction and the motorsailer concept. Unlike the performance-oriented racing hulls that would define the brand’s reputation during the Admiral’s Cup era, the 50 MS was built for the sailor who prioritized sheltered long-distance voyaging and significant mechanical reliability. Only two hulls were ever produced—launched between 1971 and 1972—making it one of the most exclusive models ever to leave the Pietarsaari shipyard. According to the Nautor Swan Heritage records, this model remains a testament to the brand's early willingness to customize designs for a specialized cruising clientele.

Sailing Performance & Handling

The Swan 50 MS is characterized by a heavy-displacement hull and a ketch rig, a configuration chosen for its versatility and balance in heavy weather. While contemporary Swans of the era, such as the Swan 43 or 55, were designed to win offshore races, the 50 MS was engineered for "steadiness of gait." Its handling is defined by high directional stability, courtesy of a long keel and a substantial displacement-to-length ratio.

Under sail, the boat is not a light-air performer; it requires a stiff breeze to overcome its significant inertia. However, once moving, the ketch rig allows for a multitude of sail combinations, making it easy to reduce sail area while maintaining a balanced helm. The "Motor Sailer" designation is fully realized in its powering capabilities; unlike a standard sailing auxiliary, the 50 MS was designed to maintain high cruising speeds under engine alone through a wide range of sea states. Technical notes from the Sparkman & Stephens Design Office highlight that the hull form was optimized to prevent the "squatting" common in sailing hulls when over-powered by a large engine, ensuring a flat, efficient wake even at 8 or 9 knots.

Interior Comfort & Variations

The interior of the Swan 50 MS is where the departure from the racing fleet is most evident. The primary feature is a raised deckhouse or pilothouse, which provides an internal steering station and 360-degree visibility—a luxury rarely seen in 1970s Nautor builds. This "MS" configuration allowed the watch-keeper to navigate in a climate-controlled environment, a significant advantage for North Sea or high-latitude cruising.

Below decks, the layout follows the classic S&S luxury standard of the period, utilizing high-grade Burmese teak and hand-rubbed finishes. The two hulls produced featured a voluminous owner’s aft cabin, a spacious main saloon, and a dedicated galley that was more substantial than the "linear" galleys found in Swan’s racing models. Because only two units were built, the interior was largely semi-custom; however, both shared the hallmark Nautor build quality that ensures the cabinetry remains structurally sound decades later. The hull’s high freeboard translates to exceptional headroom throughout the vessel, removing the "cramped" feeling often associated with early fiberglass yachts.

Due to its extreme rarity, the Swan 50 MS does not have a wide media footprint. It is primarily discussed within the inner circles of the S&S Swan Association and among maritime historians specializing in the "Golden Age" of Finnish boatbuilding. It is frequently cited in Nautor’s own historical retrospectives as the precursor to their later exploration of larger, more comfort-oriented cruising yachts. While it lacks the racing trophies of its sibling, the Swan 65, it is regarded by collectors as a "unicorn" of the Nautor fleet—a vessel that combines the pedigree of S&S with a level of sheltered comfort that was decades ahead of its time.

Known Issues & Buyer’s Checklist

Purchasing a Swan 50 MS is an exercise in classic yacht restoration and preservation. Prospective buyers should focus on three primary areas:

  • Teak Deck Integration: Like most Nautor yachts of this vintage, the teak decks were originally screwed into a balsa-cored sandwich. After 50 years, moisture ingress into the core is a common "gotcha." Verification of the deck's structural integrity is paramount.
  • Engine & Systems Complexity: As a motor sailer, the 50 MS features more complex mechanical and plumbing systems than a standard sailing yacht. The original engines were often heavy-duty Perkins or Volvos; while robust, the integration of an internal steering station means dual throttle and steering cables must be inspected for corrosion and play.
  • Gelcoat Osmosis: Early fiberglass construction at Nautor was superior, but like all hulls from the early 1970s, "Swan blisters" (osmosis) can occur. A moisture meter survey of the hull below the waterline is essential.
  • Rigging Fatigue: The ketch rig involves two masts and a significant amount of standing rigging. Given the age, unless the masts have been pulled and the tangs/chainplates NDT-tested (Non-Destructive Testing) recently, a full rig replacement should be budgeted.

Community & Resources

The primary hub for technical data and owner support is the S&S Swan Association (also known as the Classic Swan Association). This organization maintains a technical wiki and forum where the original build specifications and hull numbers for the 50 MS are documented. While Nautor's Swan provides modern support, this independent association is the best source for finding historical blueprints and advice on sourcing period-correct hardware for Sparkman & Stephens designs.

The Verdict

The Swan 50 MS is a collector's masterpiece that offers a unique blend of Finnish craftsmanship and American naval architecture. It is not a boat for the regatta circuit, but rather a robust, elegant platform for an owner who appreciates the aesthetics of the 1970s and the security of a pilothouse.

Pros:

  • Extreme Rarity: With only two hulls built, it is a centerpiece of any marina.
  • Superior Protection: The internal helm and deckhouse make it a true four-season cruiser.
  • Build Pedigree: Features the legendary S&S hull lines and Nautor’s "over-built" structural integrity.

Cons:

  • Sailing Limitations: Lacks the agility and light-air performance of the standard Swan range.
  • Maintenance Overhead: Two masts and a motor-sailer-grade engine increase long-term service costs.
  • Market Scarcity: Finding one for sale is a multi-year endeavor.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Skeg-Hung
Ballast
14500 lbs
Displacement
51000 lbs
Water Capacity
530 gal
Fuel Capacity
480 gal

Dimensions

Length Overall (LOA)
49.58 ft
Waterline Length (LWL)
37.5 ft
Beam
15.08 ft
Draft
5.58 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Ketch
P (Main Luff)
51.25 ft
E (Main Foot)
14.5 ft
I (Foretriangle Height)
59 ft
J (Foretriangle Base)
19.92 ft
Forestay Length (est)
62.27 ft
Sail Area
1112 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
12.93
Ballast / Displacement Ratio
28.43
Displacement / Length Ratio (D/L) Ratio
431.75
Comfort Ratio
51.68
Capsize Screening Formula
1.63
Hull Speed
8.21 kn