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Sailboat Specifications

Apache 41

Masthead Sloop · Catamaran Twin Cbrd.

Designed by J. R. Macalpine-Downie · Built by Sail Craft Ltd. (Uk) · First built 1970

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LOA 40.83 ft  ·  Beam 19.50 ft  ·  Displacement 16,000.00 lb  ·  Sail Area 710.00 ft²  ·  Masthead Sloop  ·  Catamaran Twin Cbrd.
About the Apache 41 Sailboat

Designed by J. R. Macalpine-Downie and built by Sail Craft Ltd. in the UK beginning in 1970, this distinctive catamaran represents an early example of production multihull sailing. With its twin centerboard configuration and fiberglass construction, the Apache 41 offers the classic advantages of catamaran design: shallow draft capability, impressive beam-to-length ratio, and reduced heeling compared to monohulls. The boat's substantial 19.50-foot beam provides exceptional stability and interior volume, while the 6.75-foot draft with centerboards allows access to shallow anchorages when boards are retracted. At 16,000 pounds displacement with 710 square feet of sail area, the Apache 41 delivers a sail area-to-displacement ratio of 17.96, indicating lively performance in light to moderate conditions. This catamaran suits coastal cruising and day sailing particularly well, offering the space and comfort that makes multihulls attractive to families and those seeking generous accommodations. The masthead sloop rig keeps sail handling straightforward, while the twin hull configuration provides natural directional stability. For sailors drawn to the multihull experience without extreme performance demands, the Apache 41 represents accessible catamaran sailing from an era when such designs were still relatively uncommon in the production boat market.

Dimensions & Specifications
LOA (Length Overall) 40.83 ft / 12.44 m
LWL (Waterline Length) 36.00 ft / 10.97 m
Beam 19.50 ft / 5.94 m
Max Draft 6.75 ft / 2.06 m
Min Draft 3.00 ft / 0.91 m
Displacement 16,000.00 lb / 7,257 kg
Sail Area (Reported) 710.00 ft² / 65.96 m²
Design & Construction
Hull Type Catamaran Twin Cbrd.
Rigging Type Masthead Sloop
Construction FG
Designer J. R. Macalpine-Downie
Builder Sail Craft Ltd. (UK)
First Built 1970
Owner Reviews

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Engine & Accommodations
Engine Type outboard X 2
KSP 0.63
Frequently Asked Questions

What is the Apache 41's sail area to displacement ratio?

The Apache 41 has a Sail Area to Displacement ratio (SA/D) of 17.96. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Apache 41's comfort ratio?

The Apache 41 has a Ted Brewer Comfort Ratio of 12.54. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Apache 41 safe for offshore sailing?

The Apache 41 has a Capsize Screening Formula value of 3.1. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Apache 41?

The theoretical hull speed of the Apache 41 is 8.04 kn knots, calculated from its waterline length.

How much does a Apache 41 weigh?

The Apache 41 has a displacement of 16,000.00 lb and a length overall (LOA) of 40.83 ft.

Who designed the Apache 41?

The Apache 41 was designed by J. R. Macalpine-Downie, first built in 1970.