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Schock 41
Designer: William E. Cook  ·  Builder: W. D. Schock Corp.(Usa)  ·  First built: 1983
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About the Schock 41

Designed by William E. Cook and built by W. D. Schock Corp. during a brief three-year production run from 1983 to 1985, this 40.75-foot sailboat represents a rare find with only five hulls ever constructed. The fin keel and spade rudder configuration, combined with a masthead sloop rig, delivers responsive handling characteristics that make her well-suited for both coastal cruising and club racing. With a sail area to displacement ratio of 20.45, the Schock 41 offers spirited performance under sail while maintaining reasonable stability for extended cruising. The generous beam of nearly 13 feet provides ample interior volume, while the deep 7.5-foot draft ensures good windward ability and contributes to her seaworthiness in offshore conditions. The boat's comfort ratio of 23.27 indicates a relatively quick motion at sea, suggesting she's better suited for active sailors rather than those seeking an ultra-comfortable cruising platform. Her capsize screening formula of 2.06 falls within acceptable parameters for coastal and near-offshore sailing, though careful attention to weather conditions would be prudent for extended offshore passages. Given the extremely limited production numbers, finding one of these boats requires patience, but owners typically praise their sailing characteristics and build quality from the respected Schock yard.

Core Dimensions
LOA (Length Overall) 40.75 ft / 12.42 m
LWL (Waterline Length) 32.17 ft / 9.81 m
Beam 12.92 ft / 3.94 m
Max Draft 7.50 ft / 2.29 m
Displacement 15,800.00 lb / 7,167 kg
Ballast 7,500.00 lb / 3,402 kg
Ballast Type Lead
Sail Area (Reported) 802.00 ft² / 74.51 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer William E. Cook
Builder W. D. Schock Corp.(USA)
First Built 1983
Last Built 1985
Number Built 5
Related Sailboats ["Cc 41" · "J/40" · "First 405 Beneteau" · "Irwin 41 Citation" · "Tartan 412"]
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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
 65
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 20.45
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
 47.47
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
 211.86
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 23.27
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 2.06
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.60 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 2.94
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1,485.11 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 20.46
Rig Dimensions
I (Foretriangle Height) 54.60 ft / 16.64 m
J (Foretriangle Base) 16.20 ft / 4.94 m
P (Mainsail Luff) 48.00 ft / 14.63 m
E (Mainsail Foot) 15.00 ft / 4.57 m
SA Fore 442.26 ft² / 41.09 m²
SA Main 360.00 ft² / 33.45 m²
SA Total (100%) 802.26 ft² / 74.53 m²
Est. Forestay Length 56.95 ft / 17.36 m
Engine & Accommodations
Engine Make Pathfinder
Engine Type Diesel
Horsepower 50
Fuel Capacity 20 gals / 76 L
Water Capacity 20 gals / 76 L
How It Compares

vs. First 405 Beneteau, Irwin 41 Citation, J/40

This boat Similar boats
Dimensions
LOA
Schock 41 ★
40.8 ft
First 405 Beneteau
40.7 ft
Irwin 41 Citation
40.8 ft
J/40
40.9 ft
LWL
Schock 41 ★
32.2 ft
First 405 Beneteau
35.5 ft
Irwin 41 Citation
33.3 ft
J/40
35.5 ft
Beam
Schock 41 ★
12.9 ft
First 405 Beneteau
12.8 ft
Irwin 41 Citation
13.0 ft
J/40
13.2 ft
Displacement
Schock 41 ★
15 lbs
First 405 Beneteau
18 lbs
Irwin 41 Citation
17 lbs
J/40
18 lbs
Ballast
Schock 41 ★
7 lbs
First 405 Beneteau
7 lbs
Irwin 41 Citation
9 lbs
J/40
7 lbs
Sail Area
Schock 41 ★
802 sq ft
First 405 Beneteau
—
Irwin 41 Citation
787 sq ft
J/40
780 sq ft
Performance
PHRF Rating (lower = faster)
Schock 41 ★
65 s/nm
First 405 Beneteau
—
Irwin 41 Citation
84 s/nm
J/40
78 s/nm
SA / Displacement (higher = more powerful)
Schock 41 ★
20.5
First 405 Beneteau
—
Irwin 41 Citation
18.8
J/40
17.1
Ballast / Disp (higher = stiffer)
Schock 41 ★
47.5 %
First 405 Beneteau
41.6 %
Irwin 41 Citation
54.3 %
J/40
41.7 %
Comfort Ratio (higher = more comfortable offshore)
Schock 41 ★
23.3
First 405 Beneteau
—
Irwin 41 Citation
24.9
J/40
33.6
Capsize Screening (lower = safer)
Schock 41 ★
2.06
First 405 Beneteau
—
Irwin 41 Citation
2.01
J/40
1.60
Displacement / Length (lower = lighter)
Schock 41 ★
211
First 405 Beneteau
—
Irwin 41 Citation
211
J/40
162
Hull Speed
Schock 41 ★
7.6 kts
First 405 Beneteau
—
Irwin 41 Citation
7.7 kts
J/40
9.6 kts
Speed Number (higher = faster)
Schock 41 ★
2.9
First 405 Beneteau
2.7
Irwin 41 Citation
2.8
J/40
—
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