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Bird Sf Bay
Designer: Fred C.brewer / Alden & Associates  ·  Builder: Madden & Lewis  ·  First built: 1923
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About the Bird Sf Bay

Sailing enthusiasts seeking a vessel with San Francisco Bay heritage will find an intriguing option in this regional design. Named after one of America's most challenging sailing venues, the Bird Sf Bay reflects the demanding conditions that define Northern California waters. Given its Bay Area origins, this sailboat likely incorporates design elements suited for the strong winds, choppy seas, and variable conditions that characterize San Francisco Bay sailing. The region's sailing culture has long emphasized boats capable of handling both spirited weekend racing and comfortable day sailing, suggesting this vessel balances performance with practicality. While detailed specifications remain limited, boats designed for San Francisco Bay typically feature robust construction and sail handling systems that accommodate the area's notorious wind shifts and gusts. The local sailing community values vessels that can handle everything from light morning breezes to afternoon winds exceeding twenty knots. For sailors familiar with Bay Area conditions or those seeking a boat with proven regional pedigree, the Bird Sf Bay represents an interesting choice. Its connection to this storied sailing venue suggests a design philosophy rooted in real-world performance demands rather than theoretical ideals.

Core Dimensions
LOA (Length Overall) 30.08 ft / 9.17 m
LWL (Waterline Length) 24.67 ft / 7.52 m
Beam 7.67 ft / 2.34 m
Max Draft 5.25 ft / 1.60 m
Displacement 9,000.00 lb / 4,082 kg
Ballast 4,600.00 lb / 2,087 kg
Sail Area (Reported) 408.00 ft² / 37.90 m²
Design & Construction
Hull Type Long Keel
Rigging Type Fractional Sloop
Construction Wood
Designer Fred C.Brewer / Alden & Associates
Builder Madden & Lewis
First Built 1923
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Performance Ratios
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
15.14
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
35.05
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
1.48
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. 6.66
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
1.9
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. 676.1
Rig Dimensions
I (Foretriangle Height) 20.25
J (Foretriangle Base) 9.5
P (Mainsail Luff) 32.0
E (Mainsail Foot) 20.5
SA Fore 96.19
SA Main 328.0
How It Compares

vs. Allegro 30, Sagitta 30, Yachting World Diamond

This boat Similar boats
Dimensions
LOA
Bird Sf Bay ★
30.1 ft
Allegro 30
30.0 ft
Sagitta 30
30.0 ft
Yachting World Diamond
30.1 ft
LWL
Bird Sf Bay ★
24.7 ft
Allegro 30
27.4 ft
Sagitta 30
24.1 ft
Yachting World Diamond
24.0 ft
Beam
Bird Sf Bay ★
7.7 ft
Allegro 30
10.3 ft
Sagitta 30
9.0 ft
Yachting World Diamond
9.8 ft
Displacement
Bird Sf Bay ★
9 lbs
Allegro 30
8 lbs
Sagitta 30
9 lbs
Yachting World Diamond
2 lbs
Ballast
Bird Sf Bay ★
4 lbs
Allegro 30
4 lbs
Sagitta 30
4 lbs
Yachting World Diamond
1 lbs
Sail Area
Bird Sf Bay ★
408 sq ft
Allegro 30
Sagitta 30
383 sq ft
Yachting World Diamond
280 sq ft
Performance
SA / Displacement (higher = more powerful)
Bird Sf Bay ★
15.1
Allegro 30
Sagitta 30
13.9
Yachting World Diamond
25.3
Ballast / Disp (higher = stiffer)
Bird Sf Bay ★
Allegro 30
50.6 %
Sagitta 30
44.3 %
Yachting World Diamond
Comfort Ratio (higher = more comfortable offshore)
Bird Sf Bay ★
35.1
Allegro 30
21.3
Sagitta 30
29.6
Yachting World Diamond
6.8
Capsize Screening (lower = safer)
Bird Sf Bay ★
1.48
Allegro 30
2.01
Sagitta 30
1.72
Yachting World Diamond
2.96
Displacement / Length (lower = lighter)
Bird Sf Bay ★
Allegro 30
189
Sagitta 30
296
Yachting World Diamond
Hull Speed
Bird Sf Bay ★
6.7 kts
Allegro 30
7.0 kts
Sagitta 30
6.6 kts
Yachting World Diamond
6.6 kts
Speed Number (higher = faster)
Bird Sf Bay ★
1.9
Allegro 30
3.2
Sagitta 30
1.5
Yachting World Diamond
6.1
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