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Seller's Description

S2 7.9, 1994 near Detroit, MI.

Solid fresh water boat in excellent condition.

Firm deck with no soft spots. Spectra backstay with flicker. Bottom professionally barrier coated by Sarns Marine in Harrison Twp, Michigan.

LOA 25’11” LWL 21’8” Beam 9’ Maximum Draft 5’ Minimum Draft 1’2” (dagger board up) Displacement 4,250 lbs. Sail Area 329 sq. ft.

Outboard and Trailer: Custom built TIG welded 3/16” steel trailer with dual axles and electric brakes Four new radial tires in February 2017. New trailer lights and frame painted in November 2019. 8 hp Evinrude Yacht Twin Outboard motor runs great.

Sail inventory: Spinnaker - October 2015. Doyle Boston of Canada Kevlar Main - May 2012. Quantum Genoa - June 2011. Also includes a storm jib, a cruising main and a second spinnaker in a launch turtle.

Instruments:

Raymarine ST60 Plus Speed and Depth installed May 2007. SIMRAD TP10 TillerPilot in 2009. Dual Suunto Marine Compasses mounted on bulkhead.

Other Equipment:

Self-tailing winch for centerboard. New SS Garhauer 4 to 1 purchase keel blocks in 2017. New solar powered cabin vent in 2018. Newer StarBoard companionway hatches. New black companionway guides (horizontal and vertical) ready to be installed. Loos rig tension gauge & docks lines, extra blocks, fenders, horseshoe buoy, etc. $19,500 or best offer.

More pictures at:

Boat can be seen at Sarns Marine on N. River Road, Harrison Twp., MI

or phone (313) 330-7533

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Specs

Designer
Graham & Schlageter
Builder
S2 Yachts
Associations
?
# Built
545
Hull
Monohull
Keel
Lifting
Rudder
?
Construction
FG

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 lb / 1,928 kg
Ballast
1,680 lb / 760 kg

Rig and Sails

Type
Sloop
Reported Sail Area
325′² / 30.2 m²
Total Sail Area
325′² / 30.2 m²
Mainsail
Sail Area
180′² / 16.7 m²
P
29 5 / 9 m
E
12 2 / 3.7 m
Air Draft
?
Foresail
Sail Area
145′² / 13.5 m²
I
30 6 / 9.3 m
J
9 6 / 2.9 m
Forestay Length
31 11 / 9.7 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.6 kn
Classic: 6.24 kn

Hull Speed

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Formula

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL

7.57 knots
Classic formula: 6.24 knots
Sail Area/Displacement
19.8
16-20: good performance

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
19.82
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
39.4
<40: less stiff, less powerful

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Formula

Ballast / Displacement * 100

39.42
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
186.1
100-200: light

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
186.05
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
15.3
<20: lightweight racing boat

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
15.25
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
2.2
>2.0: better suited for coastal cruising

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
2.22
<2: better suited for ocean passages
>2: 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.

This listing is presented by SailingTexas.com. Visit their website for more information or to contact the seller.

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