Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Lifting Keel
Rigging Type: Fractional Sloop
LOA: 25.92 ft
LWL: 21.67 ft
S.A. (reported): 329.00 ft²
Beam: 9.00 ft
Displacement: 4,250.00 lb
Ballast: 1,675.00 lb
Max Draft: 5.00 ft
Min Draft: 1.12 ft
Construction: FG
First Built: 1981
# Built: 545
Builder: S2 Yachts
Designer: Graham & Schlageter

Accomodations

Water: 6 gals
Headroom: 5.42 ft

Sailboat Calculations

Definitions
S.A. / Displ.: 20.12
Bal. / Displ.: 39.41
Disp: / Len: 186.45
Comfort Ratio: 15.33
Capsize Screening Formula: 2.23
S#: 3.21
Hull Speed: 6.24 kn
Pounds/Inch Immersion: 696.86 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 30.50 ft
J: 9.50 ft
P: 29.42 ft
E: 12.25 ft
S.A. Fore: 144.88 ft²
S.A. Main: 180.20 ft²
S.A. Total (100% Fore + Main Triangles): 325.08 ft²
S.A./Displ. (calc.): 19.88
Est. Forestay Length: 31.95 ft

Sailboat Links

Designers: Graham & Schlageter
Builders: S2 Yachts (USA)
Associations: S2 7.9 Class Association
Download Boat Record:

Notes

AKA the Grand Slam 7.9
Sail area:
-Main: 180 ft² / 16.72 m²
-Jib: 149 ft² / 13.84 m²
A few (17) were delivered with a fixed keel and masthead rig. (See S2 7.9FK for specs.)
Inboard power available as an option... BMW 7.5 hp diesel.