Beta Marine

Sailboat Specifications

Hull Type: Swing Keel
Rigging Type: Fractional Sloop
LOA: 17.75 ft
LWL: 15.50 ft
S.A. (reported): 140.00 ft²
Beam: 6.50 ft
Displacement: 1,050.00 lb
Ballast: 260.00 lb
Max Draft: 4.00 ft
Min Draft: 0.67 ft
Construction: FG
First Built: 1968
Last Built: 1978
# Built: 230
Builder: Westerly Marine Ltd./Anglo Marine (UK)
Designer: Ian Proctor

Sailboat Calculations

S.A. / Displ.: 21.72
Bal. / Displ.: 24.76
Disp: / Len: 125.88
Comfort Ratio: 8.28
Capsize Screening Formula: 2.56
Hull Speed: 5.28 kn
Pounds/Inch Immersion: 359.99 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Sailboat Links

Designers: Ian Proctor
Builders: Westerly Marine Construction Ltd.
Associations: Westerly Owners Association
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Fin keel and twin keel models also available. (186 hulls from Westerly Marine. It is thought that as many as 40 more were built after 1978 by at least 2 other builders from the same tooling.)