Design and Construction
The 447 measures 44'7" overall, with a 36'3" waterline and a 13-foot beam. Displacement is 28,000 pounds, including 12,000 pounds of lead ballast.
Perry’s collaboration with Ta Shing produced a solid GRP hull reinforced with a massive internal grid system. That grid absorbs mast and keel loads. Below the waterline, a modified fin keel and skeg-hung rudder combine windward ability with protection for the steering gear.
The lead ballast is encapsulated within the keel stub, markedly reducing the structural vulnerability commonly called “keel smile.” Above the waterline, many 447s left the yard with thick teak decks screwed into the sub-deck. Inside, the joinery uses solid teak and high-grade veneers to create a warm, secure cabin environment.
Rig, Performance, and Handling
Most Norseman 447s were cutter-rigged, providing a versatile sail plan for changing wind strengths. Total sail area is 1,008 square feet. A Sail Area/Displacement ratio of 17.4 indicates moderate power rather than an over-canvassed boat.
The Ballast/Displacement ratio is 42.8 percent, making the 447 exceptionally stiff and able to carry sail longer than lighter yachts. Its Displacement/Length ratio of 263 contributes to a stable, predictable motion. A Capsize Screening Formula of 1.71 sits well under the 2.0 offshore limit, while the Brewer Motion Comfort Ratio of 36.2 describes a gentle boat that spares the crew in rough water.
Standing rigging is typically 1×19 stainless wire with mechanical Norseman terminals. The terminals are reusable, but blue-water service calls for fresh wire and internal cones every 10 to 12 years. With a well-maintained 50 to 70hp diesel, economical cruising speed is 6.5 to 7.2 knots.
Cockpit and Accommodations
Ta Shing offered both aft- and centre-cockpit layouts. Traditionalists often prefer the aft-cockpit version for its sleeker profile and better helm feel, while the centre-cockpit model provides a substantial aft master suite.
The galley is typically U-shaped and located to port or starboard of the companionway, where the cook can brace securely underway. Many boats carry more than 150 gallons of water and 100 gallons of fuel, supporting extended self-sufficiency on passage.
Known Issues and Refit Priorities
The original black iron fuel tanks can corrode from the outside in if they sit in damp bilge water. This failure mode is worth checking on any candidate boat.
The screwed teak decks found on many hulls also deserve close attention. Their numerous fasteners penetrate the sub-deck, creating potential paths for moisture when decades-old caulking begins to fail.
Although reusable Norseman terminals make partial rig renewal straightforward, the 10- to 12-year offshore wire-replacement interval remains a fixed ownership cost. On an aging 447, tank corrosion and deck-fastening integrity are the two structural systems most likely to drive a major refit.
The Verdict
The Norseman 447 is a thoughtfully engineered Perry cruiser. Its encapsulated ballast, massive internal grid, and high ballast ratio provide a stiff, comfortable offshore platform. Ta Shing’s construction and teak joinery age well, but owners need to stay ahead of the original black iron tanks and screwed teak decks.
Pros
- Encapsulated lead ballast removes the keel-smile failure path
- Massive internal grid carries rig and keel loads without hull flex
- High ballast and comfort ratios contribute to predictable, low-fatigue motion
- Cutter rig provides a versatile, easily reduced sail plan
Cons
- Original black iron fuel tanks can corrode in damp bilges
- Many hulls have screwed teak decks with a long-term risk of moisture ingress
- Standing-rigging wire requires replacement on a strict offshore interval
