Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin w/transom hung rudder
Rigging Type: Fractional Sloop
LOA: 12.50 ft / 3.81 m
LWL: 11.83 ft / 3.61 m
S.A. (reported): 76.00 ft² / 7.06 m²
Beam: 5.58 ft / 1.70 m
Displacement: 480.00 lb / 218 kg
Ballast: 150.00 lb / 68 kg
Max Draft: 1.58 ft / 0.48 m
Construction: FG
First Built: 1974
Last Built: 1975
# Built: 300
Builder: Melen Marine Ltd.(USA)
Designer: Herb Stewart

Sailboat Calculations

Definitions
S.A. / Displ.: 19.86
Bal. / Displ.: 31.25
Disp: / Len: 129.43
Comfort Ratio: 6.24
Capsize Screening Formula: 2.85
S#: 4.12
Hull Speed: 4.61 kn
Pounds/Inch Immersion: 235.87 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 16.16 ft / 4.93 m
J: 5.08 ft / 1.55 m
P: 13.92 ft / 4.24 m
E: 5.00 ft / 1.52 m
S.A. Fore: 41.05 ft² / 3.81 m²
S.A. Main: 34.80 ft² / 3.23 m²
S.A. Total (100% Fore + Main Triangles): 75.85 ft² / 7.05 m²
S.A./Displ. (calc.): 19.82
Est. Forestay Length: 16.94 ft / 5.16 m

Sailboat Links

Designers: Herb Stewart
Related Sailboats: SPARROW 12
Download Boat Record:

Notes

Said to be a 'splashed' copy of the earlier SPARROW 12 built by HMS Marine Inc.(USA) with some modifications.
A daysailer version (without the cabin trunk) was known as the GUPPY 130.