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Sailboat Specifications

C Scow

Cat (Marconi) · Scow Twin Cbrd.

Designed by J.o. Johnson · Built by Johnson Boatworks (Usa) · First built 1905

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LOA 20.00 ft  ·  Beam 7.00 ft  ·  Displacement 650.00 lb  ·  Sail Area 216.00 ft²  ·  Cat (Marconi)  ·  Scow Twin Cbrd.
About the C Scow Sailboat

Designed by J.O. Johnson in 1905, this distinctive scow represents over a century of refined inland sailing excellence. The twin centerboard configuration and characteristic scow hull form deliver exceptional shallow-water performance, making this design particularly well-suited for lake sailing and protected waters where traditional keelboats would struggle. At 20 feet overall with a 7-foot beam, the C Scow strikes an ideal balance between manageable size and spirited performance. The cat-rigged Marconi sail plan provides 216 square feet of working sail area, generating impressive power from the relatively lightweight 650-pound displacement. This combination results in a remarkably responsive boat that rewards skilled helmsmanship while remaining accessible to developing sailors. The scow's flat-bottomed hull form and twin centerboards create a unique sailing experience characterized by quick acceleration and nimble handling. Originally built in wood by Johnson Boatworks, modern versions utilize fiberglass construction while maintaining the classic performance characteristics that have made this design a favorite among one-design racing fleets across the Midwest. With its shallow 3.30-foot draft, the C Scow excels in waters where deeper boats cannot venture, opening up extensive cruising grounds on inland lakes and shallow coastal areas. The design's enduring popularity speaks to its successful blend of performance, practicality, and pure sailing enjoyment.

Dimensions & Specifications
LOA (Length Overall) 20.00 ft / 6.10 m
Beam 7.00 ft / 2.13 m
Max Draft 3.30 ft / 1.01 m
Min Draft 0.20 ft / 0.06 m
Displacement 650.00 lb / 295 kg
Sail Area (Reported) 216.00 ft² / 20.07 m²
Design & Construction
Hull Type Scow Twin Cbrd.
Rigging Type Cat (Marconi)
Construction FG or Wood
Designer J.O. Johnson
Builder Johnson Boatworks (USA)
First Built 1905
Associations C Scow Association (USA)
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Frequently Asked Questions

What is the C Scow's sail area to displacement ratio?

The C Scow has a Sail Area to Displacement ratio (SA/D) of 46.13. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the C Scow's comfort ratio?

The C Scow has a Ted Brewer Comfort Ratio of 4.17. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the C Scow safe for offshore sailing?

The C Scow has a Capsize Screening Formula value of 3.23. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the C Scow?

The theoretical hull speed of the C Scow is 5.52 kn knots, calculated from its waterline length.

How much does a C Scow weigh?

The C Scow has a displacement of 650.00 lb and a length overall (LOA) of 20.00 ft.

Who designed the C Scow?

The C Scow was designed by J.o. Johnson, first built in 1905.