Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 9.15 m
LWL: 7.29 m
S.A. (reported): 36.51 m²
Beam: 3.17 m
Displacement: 3,447 kg
Ballast: 1,349 kg
Max Draft: 1.70 m
Construction: FG
First Built: 1978
Last Built: 1981
# Built: 125
Builder: Kyung-Il Yacht (KOREA)
Designer: Jac. de Ridder

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Yanmar
Model: 2QM15
Type: Diesel
Fuel: 45 L


Water: 151 L

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: 11.73 m
J: 3.68 m
P: 10.39 m
E: 2.87 m
S.A. Fore: 21.60 m²
S.A. Main: 14.91 m²
S.A. Total (100% Fore + Main Triangles): 36.52 m²
S.A./Displ. (calc.): 16.32
Est. Forestay Length: 12.30 m

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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