Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 31.50 ft
LWL: 24.00 ft
S.A. (reported): 423.00 ft²
Beam: 10.50 ft
Displacement: 9,500.00 lb
Ballast: 4,200.00 lb
Max Draft: 5.57 ft
Construction: FG
First Built: 1979
Last Built: 1989
# Built: 300
Builder: Sadler Yachts (UK)
Designer: David Sadler

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Auxiliary Power/Tanks (orig. equip.)

Make: Buhk
Model: 20
Type: Diesel
Fuel: 15 gals


Water: 20 gals

Sailboat Calculations

S.A. / Displ.: 15.14
Bal. / Displ.: 44.21
Disp: / Len: 306.79
Comfort Ratio: 24.41
Capsize Screening Formula: 1.99
S#: 1.55
Hull Speed: 6.56 kn
Pounds/Inch Immersion: 900.42 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 39.75 ft
J: 11.75 ft
P: 36.00 ft
E: 10.50 ft
S.A. Fore: 233.53 ft²
S.A. Main: 189.00 ft²
S.A. Total (100% Fore + Main Triangles): 422.53 ft²
S.A./Displ. (calc.): 15.12
Est. Forestay Length: 41.45 ft

Sailboat Links

Designers: David Sadler
Builders: Sadler Yachts
Download Boat Record:


Shoal draft:1.4m/4.59'
Bilge keel: 1.2m/3.94'
Keel/CB - BU: 1.1m/3.61' BD:1.4m/4.92'
Initially supplied with the Watermota 30hp Seapanther engine.
After 1982 boats were fitted with the Bukh 20.
Beginning in 1986 the standard engine was the Volvo 2002.

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