Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 29.86 ft
LWL: 23.67 ft
S.A. (reported): 402.00 ft²
Beam: 10.05 ft
Displacement: 7,200.00 lb
Ballast: 3,550.00 lb
Max Draft: 5.33 ft
Construction: FG
Ballast Type: Lead
First Built: 1975
# Built: 360
Builder: Clark Boat Co. (USA)
Designer: Bruce Kirby

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Universal
Model: Atomic 4
Type: Gas
Fuel: 17 gals

Accomodations

Water: 20 gals

Sailboat Calculations

Definitions
S.A. / Displ.: 17.30
Bal. / Displ.: 49.31
Disp: / Len: 242.38
Comfort Ratio: 20.16
Capsize Screening Formula: 2.09
S#: 2.28
Hull Speed: 6.52 kn
Pounds/Inch Immersion: 849.98 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 38.50 ft
J: 12.50 ft
P: 34.00 ft
E: 9.50 ft
S.A. Fore: 240.63 ft²
S.A. Main: 161.50 ft²
S.A. Total (100% Fore + Main Triangles): 402.13 ft²
S.A./Displ. (calc.): 17.31
Est. Forestay Length: 40.48 ft

Sailboat Links

Designers: Bruce Kirby
Builders: Clark Boat Company
Associations: Half Ton Class
Download Boat Record:

Notes

Based on an IOR 1/2 ton prototype.
A more racing oriented version (with a shorter coach roof and longer cockpit, deeper keel etc.) was also available. How many of these were built in unknown.
Available with the deeper keel: 6.0'/1.83m
Tall rig:
I: 39.5'/12.04m
J: 12.5'/3.81m
P: 35.0'/10.67m
E: 9.5'/2.90m
Thanks to SJ 30 owner Chris F. for providing additional information.