Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Centerboard Dinghy
Rigging Type: Fractional Sloop
LOA: 19.00 ft
LWL: 15.25 ft
S.A. (reported): 172.00 ft²
Beam: 6.50 ft
Displacement: 700.00 lb
Ballast: 130.00 lb
Max Draft: 4.95 ft
Min Draft: 0.42 ft
Construction: Wood or FG
First Built: 1938
# Built: 15550
Builder: Various
Designer: Sparkman & Stephens

KLSC Leaderboard

KLSC Leaderboard

Sailboat Calculations

S.A. / Displ.: 34.96
Bal. / Displ.: 18.57
Disp: / Len: 88.11
Comfort Ratio: 5.46
Capsize Screening Formula: 2.93
S#: 7.61
Hull Speed: 5.23 kn
Pounds/Inch Immersion: 354.18 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 20.00 ft
J: 6.91 ft
P: 24.00 ft
E: 10.00 ft
S.A. Fore: 69.10 ft²
S.A. Main: 120.00 ft²
S.A. Total (100% Fore + Main Triangles): 189.10 ft²
S.A./Displ. (calc.): 38.44
Est. Forestay Length: 21.16 ft


One of the most popular one-design classes in the US since the 1940's. But fleets also exist in other parts of the world.
Although originally designed for wood planked construction, nearly all boats since the early 1960's have been built of fiberglass.
Ballast above is max weight of centerboard.