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BIRD (SF BAY)
Built by Madden & Lewis (USA)
• Designed by Fred C.Brewer / Alden & Associates
General Information
Hull Type:
Long Keel
Rigging Type:
Fractional Sloop
Construction:
Wood
First Built:
1923
Number Built:
30
Dimensions
Length Overall (LOA):
9.17 m
Length Waterline (LWL):
7.52 m
Beam:
2.34 m
Draft (Max):
1.60 m
Weight & Ballast
Displacement:
4,082 kg
Ballast:
2,087 kg
Sail Plan
Foresail Area:
8.94 m²
Mainsail Area:
30.47 m²
Total Sail Area (calculated):
39.41 m²
Sail Area (reported):
37.90 m²
I (Fore Triangle Height):
6.17 m
J (Fore Triangle Base):
2.90 m
P (Mainsail Hoist):
9.75 m
E (Boom Length):
6.25 m
Engine & Systems
Performance Ratios
Hull Speed:
6.66 knots
SA/Displacement (Calculated):
15.43
SA/Displacement (Reported):
15.14
Ballast/Disp Ratio:
51.11%
Displacement/Length:
267.60
Comfort Ratio:
35.05
Capsize Screening:
1.48
S-Number:
1.90
Notes
Fred C. Brewer, a naval architect from Sausalito, California did the preliminary design work with Sam Crocker of Alden Associates, drawing the final plans. (Alden design #157) Originally called the San Francisco 'S' class, it became known as the BIRD when some of the first boats were given bird names. A number of the original boats still exist and race as a fleet to this day on San Francisco Bay. (2008)