Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 23.75 ft
LWL: 19.50 ft
S.A. (reported): 210.00 ft²
Beam: 7.09 ft
Displacement: 2,600.00 lb
Ballast: 1,314.00 lb
Max Draft: 3.75 ft
Construction: FG
First Built: 1968
Last Built: 1985
# Built: 600
Builder: Butler Moldings Ltd. (UK)
Designer: Oliver Lee /Chris Butler

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Sailboat Calculations

S.A. / Displ.: 17.81
Bal. / Displ.: 50.54
Disp: / Len: 156.54
Comfort Ratio: 14.23
Capsize Screening Formula: 2.06
S#: 3.39
Hull Speed: 5.92 kn
Pounds/Inch Immersion: 494.00 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 25.75 ft
J: 7.67 ft
P: 22.25 ft
E: 10.00 ft
S.A. Fore: 98.75 ft²
S.A. Main: 111.25 ft²
S.A. Total (100% Fore + Main Triangles): 210.00 ft²
S.A./Displ. (calc.): 17.81
Est. Forestay Length: 26.87 ft

Sailboat Links

Designers: Oliver Lee
Builders: Butler Mouldings Ltd. (UK)
Associations: Achilles Yachts Owners Assoc.
Related Sailboats: AJAX (LEE)
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Based on the AJAX (open cockpit day boat) and modified by the builder, Chris Butler.
Fin keel version - draft: 3.75'.
Triple keel - draft: 3.51'.