Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Fractional Sloop
LOA: 10.36 m
LWL: 9.00 m
S.A. (reported): 53.88 m²
Beam: 3.41 m
Displacement: 3,561 kg
Ballast: 1,120 kg
Max Draft: 1.98 m
Construction: FG
First Built: 1983
# Built: 15
Builder: Marine Glass (UK)
Designer: Rob Humphreys

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Yanmar
Model: 2GM20
Type: Diesel

Sailboat Calculations

S.A. / Displ.: 23.57
Bal. / Displ.: 31.46
Disp: / Len: 136.09
Comfort Ratio: 15.74
Capsize Screening Formula: 2.26
S#: 4.29
Hull Speed: 7.28 kn
Pounds/Inch Immersion: 1,181.76 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 11.80 m
J: 3.35 m
P: 12.82 m
E: 4.72 m
S.A. Fore: 19.78 m²
S.A. Main: 30.29 m²
S.A. Total (100% Fore + Main Triangles): 50.07 m²
S.A./Displ. (calc.): 21.90
Est. Forestay Length: 12.27 m

Sailboat Links

Designers: Rob Humphreys
Builders: Northshore Yachts (UK)
Associations: IOR 3/4 ton
Download Boat Record:


Based on an IOR 3/4 ton design 'Roller Skate' (1982). (Prototype was 'Seren Wib')
Available in Grand Prix or Racer/Cruisers versions. A number of other boats were built to this design besides this one from MG.