Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 30.02 ft
LWL: 23.92 ft
S.A. (reported): 393.00 ft²
Beam: 10.40 ft
Displacement: 7,600.00 lb
Ballast: 2,975.00 lb
Max Draft: 5.58 ft
Construction: FG
First Built: 1978
Last Built: 1981
# Built: 125
Builder: Kyung-Il Yacht (KOREA)
Designer: Jac. de Ridder

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KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Yanmar
Model: 2QM15
Type: Diesel
Fuel: 12 gals


Water: 40 gals

Sailboat Calculations

S.A. / Displ.: 16.32
Bal. / Displ.: 39.14
Disp: / Len: 247.90
Comfort Ratio: 20.16
Capsize Screening Formula: 2.12
S#: 2.13
Hull Speed: 6.55 kn
Pounds/Inch Immersion: 888.88 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 38.50 ft
J: 12.08 ft
P: 34.08 ft
E: 9.42 ft
S.A. Fore: 232.54 ft²
S.A. Main: 160.52 ft²
S.A. Total (100% Fore + Main Triangles): 393.06 ft²
S.A./Displ. (calc.): 16.32
Est. Forestay Length: 40.35 ft

Sailboat Links

Designers: Jacques De Ridder
Associations: Half Ton Class
Download Boat Record:


Designed as IOR 1/2 ton.
Developed, and early boats (number unknown) built in Holland.
The molds were shipped to Korea where, it is thought, the majority were built.
Kyung-Il Yacht was part of Hyundai, the Korean conglomerate.
Possibly the same as the TUTRLE 30? (for which we have only seen a brochure)

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