Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/transom hung rudder
Rigging Type: Masthead Sloop
LOA: 28.42 ft
LWL: 22.83 ft
S.A. (reported): 372.00 ft²
Beam: 9.50 ft
Displacement: 8,200.00 lb
Ballast: 3,400.00 lb
Max Draft: 4.92 ft
Construction: FG
Ballast Type: Iron
First Built: 1981
Last Built: 1988
# Built: 400
Builder: Sadler Yachts (UK)
Designer: David Sadler

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Bukh
Type: Diesel
Fuel: 15 gals


Water: 10 gals

Sailboat Calculations

S.A. / Displ.: 14.68
Bal. / Displ.: 41.46
Disp: / Len: 307.64
Comfort Ratio: 25.78
Capsize Screening Formula: 1.89
S#: 1.51
Hull Speed: 6.40 kn
Pounds/Inch Immersion: 774.95 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 37.50 ft
J: 11.75 ft
P: 31.99 ft
E: 9.48 ft
S.A. Fore: 220.31 ft²
S.A. Main: 151.63 ft²
S.A. Total (100% Fore + Main Triangles): 371.94 ft²
S.A./Displ. (calc.): 14.68
Est. Forestay Length: 39.30 ft

Sailboat Links

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


Shoal draft fin: 1.2m/3.9'
Bilge keel: 1.1m/3.61'
When first introduced, this model was promoted as being 'unsinkable'. It was built with a number of strategically placed cavities filled with foam throughout the interior. To prove the claim, a number of tests were conducted, where the boat was completely flooded, after which it not only remained afloat, but still maneuverable.