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Sailboat

S2 7.9

1981

S2 7.9 is a 25.92 ft / 7.90 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

Dimensions

Length Overall
25.92 ft / 7.90 m
Waterline Length
21.67 ft / 6.61 m
Beam
9.00 ft / 2.74 m
Draft
1.12 ft / 0.34 m — 5.00 ft / 1.52 m
Displacement
4,250 lb / 1,928 kg
Ballast
1,675 lb / 760 kg
drawing
photo
drawing

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
325.00 ft2 / 30.19 m2
Total Sail Area
325.07 ft2 / 30.20 m2
Mainsail
Sail Area
180.20 ft2 / 16.74 m2
P
29.42 ft / 8.97 m
E
12.25 ft / 3.73 m
Mast Height
Foresail
Sail Area
144.88 ft2 / 13.46 m2
I
30.50 ft / 9.30 m
J
9.50 ft / 2.90 m
Est. Forestay Len.
31.95 ft / 9.74 m

Spinnaker

SPL/TPS
ISP

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

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