The Calkins 50, often referred to as the C-50, is a seminal design by Wendell "Skip" Calkins that challenged the mid-20th-century distinction between a high-performance sailing yacht and a powerful motor cruiser. Introduced in the early 1960s and primarily constructed by American Marine in Hong Kong (the shipyard that would later become Grand Banks), the Calkins 50 was a precursor to the modern "fast cruiser" movement. With its distinctive double-ended hull and low-profile deckhouse, it was designed to achieve something few yachts of its era could: a consistent 9-to-10-knot cruising speed under both sail and power. While technical documentation from the original builder is no longer digitally maintained, the vessel remains a cult classic among long-range cruisers who value its unique blend of efficiency and sea-kindliness.
Calkins 50 Information, Review, Specs

- Make
- Calkins
- Model
- 50
- Builder
- American Marine Stoll Shipyards
- Designer
- Wendell H. Calkins
- Number Built
- Production Year(s)
- 1960 - ??
Sailing Performance & Handling
The performance of the Calkins 50 is defined by its unusually light displacement-to-length (D/L) ratio for a 1960s-era vessel. While most cruisers of the time were heavy, full-keeled hulls, Skip Calkins utilized a long waterline and a relatively narrow beam to reduce drag. This allows the boat to regularly exceed its theoretical hull speed when reaching or running. In a 1960s technical assessment, Calkins famously argued that a sailing yacht could be designed to "surf" on ocean swells rather than plowing through them, a philosophy that makes the C-50 surprisingly nimble for a vessel of its size.
Under sail, the C-50 is typically rigged as a cutter or a sloop with a large foretriangle. It tracks exceptionally well due to its long, deep keel, which provides a steadying effect in a seaway. Handling is often described as "deliberate but rewarding"; while it lacks the instantaneous acceleration of a modern fin-keel racer, its momentum and long waterline allow it to punch through head seas without the hobby-horsing common in shorter-waterline yachts. When the wind dies, the vessel's design for high-speed motoring comes to the fore. It was specifically engineered to carry a larger engine than typical sailboats, allowing it to maintain hull speed without the squatting or vibration seen in hulls not optimized for power.
Interior Comfort & Variations
The interior of the Calkins 50 was revolutionary for providing a "room with a view" via its raised deckhouse. This configuration allows the helmsman and guests to remain protected while maintaining 360-degree visibility, a feature that pre-dated the modern deck-saloon trend by decades. The standard layout typically features a large galley and dining area within the deckhouse, with sleeping quarters located forward and aft.
Because many Calkins 50s were semi-custom builds by American Marine, interior finishes vary significantly. Most feature the high-quality Burmese teak joinery for which the Hong Kong yard became famous. The vessel's 12-foot beam is modest by modern standards, leading to a cabin that feels more like a traditional "ship" than a wide-open modern apartment. However, the use of large windows in the saloon prevents the interior from feeling subterranean. The Calkins 50 had one primary sibling, the Calkins 40, which was a scaled-down version utilizing the same double-ended, fast-cruiser philosophy. While the 40-foot version is more manageable for a couple, it lacks the expansive engine room and fuel capacity that make the 50-footer a true trans-oceanic contender.
Known Issues & Buyer’s Checklist
Prospective buyers must prioritize the structural integrity of the hull material, as the Calkins 50 was produced in both wood (cold-molded or strip-planked) and fiberglass.
- Hull Composition: Early fiberglass hulls from the 1960s were heavily built but may suffer from significant osmotic blistering if not properly maintained. For wooden examples, a rigorous inspection of the "deadwood" area and the transition between the keel and the hull is mandatory to check for rot or fastener failure.
- Deck-to-Hull Joint: Given the age of these vessels, the deckhouse windows and the deck-to-hull joint are common points for freshwater ingress. Look for water staining on the interior teak cabinetry, which often signals long-term leaks that could compromise the core of the deck.
- Engine Alignment: Because the C-50 was designed to motor at high speeds, the engine mounts and shaft alignment are under more stress than on a standard sailboat. Check for excessive vibration at high RPMs, which may indicate worn Cutless bearings or an imbalanced prop.
- Fuel and Water Tanks: The original tanks were often made of iron or early-grade stainless steel. In many hulls, these are located deep in the bilge or behind cabinetry, making replacement an invasive and expensive project.
Community & Resources
While there is no longer a formal manufacturer support network, the Calkins 50 is a mainstay in the classic yacht community. Technical discussions and historical data are occasionally preserved through the WoodenBoat Forum and the Grand Banks owner archives, given the American Marine connection. Owners often congregate in specialized "Classic Plastic" or "Double-Ender" groups, where Skip Calkins' original design notes are frequently shared.
The Verdict
The Calkins 50 remains a sophisticated choice for the traditionalist who refuses to sacrifice speed for comfort. It is a vessel designed for the "long haul," offering a level of motoring performance that few modern sailboats can match.
Pros:
- Exceptional Speed: Capable of maintaining 9+ knots under power or sail in the right conditions.
- Visibility: The raised deckhouse offers superior situational awareness and natural light.
- Build Quality: Those built by American Marine feature world-class teak craftsmanship.
Cons:
- Age-Related Maintenance: Systems, tanks, and hull cores are likely reaching the end of their functional lifespan unless previously refitted.
- Narrow Beam: Offers less interior volume than modern 50-footers.
- Draft: Its 7'6" draft (standard on most hulls) limits its utility in shallow cruising grounds like the Bahamas.
Measurements
Construction & Hull
- Construction Material
- Wood (Strip Planked)
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x Skeg-Hung
- Ballast
- 7000 lbs (Lead)
- Displacement
- 27500 lbs
- Water Capacity
- 300 gal
- Fuel Capacity
- 250 gal
Dimensions
- Length Overall (LOA)
- 50 ft
- Waterline Length (LWL)
- 43 ft
- Beam
- 12 ft
- Draft
- 7.5 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 1038 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 18.23
- Ballast / Displacement Ratio
- 25.45
- Displacement / Length Ratio (D/L) Ratio
- 154.41
- Comfort Ratio
- 34.43
- Capsize Screening Formula
- 1.59
- Hull Speed
- 8.79 kn