Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 28.00 ft / 8.53 m
LWL: 24.50 ft / 7.47 m
S.A. (reported): 384.00 ft² / 35.67 m²
Beam: 9.50 ft / 2.90 m
Displacement: 6,900.00 lb / 3,130 kg
Ballast: 3,060.00 lb / 1,388 kg
Max Draft: 4.83 ft / 1.47 m
Construction: FG
First Built: 1975
# Built: 107
Builder: Grampian Marine Ltd. (CAN)
Designer: Rolf van der Sleen

Auxiliary Power/Tanks (orig. equip.)

Make: Volvo
Type: Diesel
Fuel: 20 gals / 76 L

Accomodations

Water: 20 gals / 76 L

Sailboat Calculations

Definitions
S.A. / Displ.: 17.00
Bal. / Displ.: 44.35
Disp: / Len: 209.46
Comfort Ratio: 20.81
Capsize Screening Formula: 2.00
S#: 2.60
Hull Speed: 6.63 kn
Pounds/Inch Immersion: 831.64 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 36.50 ft / 11.13 m
J: 12.00 ft / 3.66 m
P: 31.50 ft / 9.60 m
E: 10.50 ft / 3.20 m
S.A. Fore: 219.00 ft² / 20.35 m²
S.A. Main: 165.38 ft² / 15.36 m²
S.A. Total (100% Fore + Main Triangles): 384.38 ft² / 35.71 m²
S.A./Displ. (calc.): 17.02
Est. Forestay Length: 38.42 ft / 11.71 m

Sailboat Links

Designers: Rolf van der Sleen
Builders: Grampian Marine
Associations: Grampian Owners Marina
Related Sailboats: INTREPID 28
Download Boat Record:

Notes

The later INTREPID 28, by Cape Dory, was based on this same design/tooling.
Shoal draft: 3.75'/1.14m
Photo courtesy Adam Hunt.

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