Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 25.33 ft
LWL: 19.33 ft
S.A. (reported): 238.00 ft²
Beam: 8.33 ft
Displacement: 4,189.00 lb
Ballast: 1,800.00 lb
Max Draft: 4.83 ft
Construction: FG
First Built: 1972
Builder: Arme Batt (NOR)/Solna Marin (SWE)
Designer: Peter Norlin

Auxiliary Power/Tanks (orig. equip.)

Make: Vire
Type: Gas
HP: 7

Sailboat Calculations

S.A. / Displ.: 14.69
Bal. / Displ.: 42.97
Disp: / Len: 258.92
Comfort Ratio: 18.19
Capsize Screening Formula: 2.07
S#: 1.87
Hull Speed: 5.89 kn
Pounds/Inch Immersion: 575.34 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 30.35 ft
J: 9.02 ft
P: 27.39 ft
E: 7.38 ft
S.A. Fore: 136.88 ft²
S.A. Main: 101.07 ft²
S.A. Total (100% Fore + Main Triangles): 237.95 ft²
S.A./Displ. (calc.): 14.69
Est. Forestay Length: 31.66 ft

Sailboat Links

Designers: Peter Norlin
Associations: Quarter Ton Class
Related Sailboats: QUARTER TON CLASS
Download Boat Record:


Originally called IW-26, built in Sweden. Also called SCAMPI 26.
Last builder: Avaldaplast of Sweden.
Designed as IOR 1/4 ton.
(2nd place 1972 1/4 ton cup at La Rochelle, France).