The Northstar 80/20 stands as a definitive example of the "motorsailer" evolution that took place in the mid-1970s, blending the heavy-weather capabilities of a dedicated cruising yacht with the interior volume and mechanical reliability of a powerboat. Designed by the prestigious firm of Sparkman & Stephens (Design #2134), the 80/20 was commissioned by Hughes Boat Works during their tenure under US Steel’s Northstar Yachts brand. The model’s name famously reflects its design philosophy: a vessel intended to provide 80% of the sailing performance of a dedicated yacht and 20% more living space and powering capability than the average cruiser of its era. When Howard Hughes repurchased the company in 1977, the model was rebranded and slightly refined as the Hughes 40.
Northstar 80/20 Information, Review, Specs

- Make
- Northstar
- Model
- 80/20
- Builder
- North Star Yachts Ltd.
- Designer
- Sparkman & Stephens
- Number Built
- Production Year(s)
- 1973 - ??
Sailing Performance & Handling
The Northstar 80/20 is a heavy-displacement ketch with a hull form that prioritizes stability and tracking over light-air agility. With a displacement of approximately 24,000 pounds and a relatively high ballast-to-displacement ratio, the boat feels exceptionally "planted" in a seaway. The Sparkman & Stephens influence is most evident in its underwater profile, which typically features a modified fin keel and a skeg-hung rudder, providing a balance between the maneuverability of a modern fin keel and the directional stability of a full-keel cruiser.
Under sail, the ketch rig offers significant versatility, allowing owners to "reef by dropping sails"—dropping the mainsail in heavy air and sailing comfortably under jib and mizzen. This "mule" configuration keeps the center of effort low and the boat balanced. While it is not a "pointing" machine and struggles in light winds under 10 knots, it excels on a reach. In conditions where lighter boats begin to feel nervous, the 80/20 utilizes its momentum to punch through chop without significant loss of speed. Technical documentation from the Sparkman & Stephens archives indicates that the hull was optimized for comfort at sea, emphasizing a gentle motion that reduces crew fatigue during long passages.
Interior Comfort & Variations
The center-cockpit configuration is the cornerstone of the 80/20’s interior appeal, allowing for a complete separation of the master quarters from the guest areas. The "walk-through" passage beneath the cockpit provides internal access to a voluminous aft cabin, which typically features a large double berth and a private head. This layout was revolutionary for a 40-foot boat in the 1970s and remains a primary draw for liveaboard sailors today.
The main salon is characterized by its 13-foot 4-inch beam, which was exceptionally wide for its time. This width allows for a deep U-shaped galley that is safe to use at sea and a large dinette that can accommodate six adults. Most iterations were finished in rich Burmese teak, reflecting the premium positioning of the Northstar brand. When the model transitioned to the Hughes 40 and later the Aura H40, slight variations in the joinery and electrical panel placement were introduced, but the core "two-cabin, two-head" layout remained consistent. The cabin also boasts impressive headroom, often exceeding 6’4” in the main salon, making it a preferred choice for taller sailors.
Known Issues & Buyer’s Checklist
Prospective buyers should approach the Northstar 80/20 with an eye toward the structural realities of 50-year-old fiberglass construction. While the hulls are robustly built, the following areas require scrutiny:
- Deck Core Saturation: Like many Canadian-built boats of this era, the Northstar 80/20 utilized a balsa-core deck. Common points of ingress include the chainplates and the numerous deck penetrations for the ketch rig. A thorough percussion test or moisture meter reading is essential around the mast steps.
- Fuel Tank Corrosion: The original black iron or aluminum fuel tanks were often glassed into the structure or placed in tight tolerances. After decades of service, these tanks can develop pinhole leaks from the bottom up due to trapped moisture. Replacing them often requires significant cabinetry removal.
- Perkins 4-108 Maintenance: Most 80/20s were equipped with the Perkins 4-108 diesel engine. While legendary for its longevity, it is known for rear main seal leaks. Buyers should check the bilge for excessive oil and inspect the heat exchanger for scale buildup.
- Chainplate Inspection: Because the 80/20 is a ketch, there is double the standing rigging to maintain. The chainplates are mounted to internal glassed-in knees; any signs of weeping or rust streaks on the interior cabinetry should be treated as a high-priority repair.
Community & Resources
Owners of the Northstar 80/20 often find common ground within the broader Hughes and Columbia owner associations. While no single-model "80/20 Club" exists, the technical specifications and original S&S blueprints are frequently discussed within the Sparkman & Stephens Association, which serves as a repository for owners of S&S-designed hulls. Technical support for the boat’s Canadian heritage is often found through regional Great Lakes cruising groups, where many of these vessels are still based.
The Verdict
The Northstar 80/20 is a rugged, "big-boned" cruiser that trades racing aspirations for liveaboard luxury and sea-kindliness. It is an ideal platform for a couple looking to transit the ICW or cruise the Caribbean in comfort.
Pros:
- Exceptional privacy provided by the aft-cabin, center-cockpit layout.
- Proven S&S hull design that handles heavy weather with grace.
- Massive interior volume and headroom for its length.
- Versatile ketch rig allows for easy short-handed sailing.
Cons:
- Sluggish performance in light air and mediocre windward ability.
- Aging balsa-cored decks are prone to moisture issues if not re-bedded.
- Large beam and displacement make for higher slip fees and hauling costs.
- Complexity of maintenance for two masts and older plumbing systems.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Full
- Rudder
- 1x Attached
- Ballast
- 9000 lbs
- Displacement
- 24600 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 40 ft
- Waterline Length (LWL)
- 31 ft
- Beam
- 13.33 ft
- Draft
- 4.75 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Ketch
- P (Main Luff)
- 43.25 ft
- E (Main Foot)
- 14 ft
- I (Foretriangle Height)
- 49.25 ft
- J (Foretriangle Base)
- 14 ft
- Forestay Length (est)
- 51.2 ft
- Sail Area
- 786 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 14.87
- Ballast / Displacement Ratio
- 36.59
- Displacement / Length Ratio (D/L) Ratio
- 368.64
- Comfort Ratio
- 35.84
- Capsize Screening Formula
- 1.83
- Hull Speed
- 7.46 kn