Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Fractional Sloop
LOA: 7.01 m
LWL: 6.07 m
S.A. (reported): 24.62 m²
Beam: 2.39 m
Displacement: 953 kg
Ballast: 422 kg
Max Draft: 1.19 m
Construction: FG
Ballast Type: Lead
First Built: 1980
# Built: 860
Builder: Seidelman
Designer: Bruce Kirby

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Sailboat Calculations

S.A. / Displ.: 25.92
Bal. / Displ.: 44.29
Disp: / Len: 118.61
Comfort Ratio: 10.04
Capsize Screening Formula: 2.45
S#: 5.19
Hull Speed: 5.98 kn
Pounds/Inch Immersion: 557.31 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 7.62 m
J: 2.71 m
P: 8.38 m
E: 3.41 m
S.A. Fore: 10.34 m²
S.A. Main: 14.31 m²
S.A. Total (100% Fore + Main Triangles): 24.64 m²
S.A./Displ. (calc.): 25.94
Est. Forestay Length: 8.09 m


Commissioned by members of Noroton YC of Darien CT USA and first built by Seidelmann Yachts.
A few were also built by Carbon Index in the UK.
Current builder (2019) is Rondar Raceboats.