The Northstar 500 is a dedicated International Offshore Rule (IOR) Quarter Ton class racer that emerged from the Canadian yard Northstar Yachts during the height of the 1970s racing boom. Designed by the esteemed firm of Sparkman & Stephens as Design #2135, the boat was commissioned by Hughes Boat Works shortly after its acquisition by US Steel. Measuring 24 feet 11 inches, the 500 was built with a singular focus on performance under the prevailing rating rules of the era, leading to a hull form characterized by a wide beam and the distinctive "pinched" ends common to IOR designs. This model achieved significant acclaim early in its life, famously winning the Quarter Ton World Championship shortly after its introduction in 1973.
Northstar 500 Information, Review, Specs

- Make
- Northstar
- Model
- 500
- Builder
- North Star Yachts Ltd.
- Designer
- Sparkman & Stephens
- Number Built
- Production Year(s)
- 1973 - ??
Sailing Performance & Handling
The Northstar 500 is a high-performance vessel that reflects the "racy" design philosophy of the early 1970s. With a significant ballast-to-displacement ratio of nearly 40% and a deep 5-foot fin keel, the boat is remarkably stiff and capable of standing up to its large masthead sloop rig. According to technical data preserved by the Sparkman & Stephens Association, the boat carries approximately 289 square feet of sail on a 4,300-pound displacement, providing a spirited Sail Area/Displacement ratio of roughly 17.5.
Handling is precise, aided by a skeg-mounted rudder that offers better tracking and protection than the spade rudders found on many pure racing contemporaries. While the hull speed is theoretically limited to approximately 6 knots, owner reports suggest the boat is exceptionally fast in light to moderate air, though the IOR-specific hull shape can become "tender" or exhibit weather helm if the genoa is not reefed early in heavy gusty conditions. Its heritage as a world champion racer is evident in its ability to point high and maintain momentum through tacks.
Interior Comfort & Variations
Consistent with its "toy with a single purpose" reputation, the interior of the Northstar 500 is secondary to its racing pedigree. The cabin provides a modest 54 inches (4.5 feet) of headroom, significantly less than its more cruising-oriented competitors like the C&C 25. Despite the low ceiling, the layout is functional for a crew of four, featuring a V-berth forward, two straight settees in the main salon, and a compact galley area.
The Northstar 500 saw several evolutionary changes throughout the factory’s history. It was also produced in Finland under the name Blue Bird 25. Following the original 500, the design was refined into the Northstar 600, which eventually served as the basis for the more cruising-friendly Hughes 26 after Howard Hughes reacquired the company in 1977. While the Hughes 26 retained the basic hull dimensions, it featured a modified deck mold and a revised interior to better suit family sailing rather than the rigors of the Quarter Ton circuit.
Known Issues & Buyer’s Checklist
Prospective buyers should focus on the specific aging characteristics of mid-70s fiberglass and the unique mechanical installations of this model.
- Atomic 4 Engine Maintenance: Many original 500s were fitted with the Universal Atomic 4 gasoline engine. Due to the engine's placement low in the bilge, the oil pan is prone to severe corrosion. Technical notes from the Sparkman & Stephens Association highlight cases where rusted oil pans have compromised the engine after decades of moisture exposure.
- Deck Core Saturation: Like many Hughes-built boats of this era, the Northstar 500 utilizes a balsa-cored deck. Soft spots around the chainplates, stanchion bases, and the mast step are common "gotchas" that indicate water ingress and potential core rot.
- Keel-to-Hull Joint: Given the deep 5-foot draft and the high-leverage fin keel, the "smile" at the leading edge of the keel joint should be inspected for signs of hard groundings or structural fatigue.
- Rigging Age: As a racy masthead sloop, the 500 places high loads on its standing rigging. Original swage fittings and chainplates should be thoroughly dye-tested or replaced if they are over 15 years old.
Community & Resources
Owners and researchers can find technical support and historical documentation through the Sparkman & Stephens Association, which maintains records for Design #2135. Because the Northstar 500 was built during a specific era of Canadian maritime history, many owners also coordinate via larger regional associations that cover Hughes and Northstar yachts, such as the Quarter Ton Class technical wikis.
The Verdict
The Northstar 500 is a pedigree-rich racer that offers a high-performance sailing experience at a relatively low entry price. While it lacks the interior volume of modern pocket cruisers, its historical significance and Sparkman & Stephens lines make it a rewarding choice for the performance-minded traditionalist.
Pros:
- Prestigious Sparkman & Stephens design with a World Championship winning history.
- Exceptional light-wind performance and pointing ability.
- Sturdy construction with a high ballast ratio for its size.
Cons:
- Severely limited interior headroom (only 4'6").
- Deep 5-foot draft limits access to some shoal-water cruising grounds.
- The Universal Atomic 4 engine requires diligent maintenance or replacement with a modern diesel.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x Skeg-Hung
- Ballast
- 1710 lbs
- Displacement
- 4298 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 24.98 ft
- Waterline Length (LWL)
- 20.23 ft
- Beam
- 9 ft
- Draft
- 5 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- 27.5 ft
- E (Main Foot)
- 8.75 ft
- I (Foretriangle Height)
- 33 ft
- J (Foretriangle Base)
- 10.25 ft
- Forestay Length (est)
- 34.56 ft
- Sail Area
- 289 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 17.49
- Ballast / Displacement Ratio
- 39.79
- Displacement / Length Ratio (D/L) Ratio
- 231.76
- Comfort Ratio
- 16.43
- Capsize Screening Formula
- 2.21
- Hull Speed
- 6.03 kn