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Sailboat

S2 7.9

1981

S2 7.9 is a 25′ 11″ / 7.9 m sailboat designed by Graham & Schlageter and built by S2 Yachts starting in 1981.

Designer
Graham & Schlageter
Builder
S2 Yachts
Hull Type
Lifting Keel
Construction
FG
Associations
?

Dimensions

Length Overall
25′ 11″ / 7.9 m
Waterline Length
21′ 8″ / 6.6 m
Beam
8′ 11″ / 2.7 m
Draft
1′ 1″ / 0.3 m — 4′ 11″ / 1.5 m
Displacement
4,250 lbs / 1,928 kg
Ballast
1,680 lbs / 760 kg
drawing
photo
drawing

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
325 ft2 / 30.2 m2
Total Sail Area
325.1 ft2 / 30.2 m2
Mainsail
Sail Area
180.2 ft2 / 16.7 m2
P
29′ 5″ / 9 m
E
12′ 2″ / 3.7 m
Mast Height
?
Foresail
Sail Area
144.9 ft2 / 13.5 m2
I
30′ 6″ / 9.3 m
J
9′ 6″ / 2.9 m
Est. Forestay Len.
31′ 11″ / 9.7 m

Auxilary Power

Make
?
Model
?
HP
?
Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
6.24 knots
Sail Area/Displacement
19.82
good performance
Ballast/Displacement
39.41
less stiff, less powerful
Displacement/Length
186.45
light
Comfort Ratio
15.23
lightweight racing boat
Capsize Screening
2.22
better suited for coastal cruising

Notes

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.

Suggest Improvements
Source: sailboatdata.com / CC BY

For sale

    For Sale

    1994 S2 7.9

    Detroit, Michigan
    $19,500 USD
    Source: SailingTexas.com
      For Sale

      1994 S2 7.9

      Grosse Pointe Woods, MI
      $19,900 USD
      Source: SailboatOwners.com

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