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ALPA 21
Built by Alpa (ITA)
• Designed by Sparkman & Stephens
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General Information
Hull Type:
Fin w/transom hung rudder
Rigging Type:
Masthead Sloop
First Built:
1976
Dimensions
Length Overall (LOA):
6.48 m
Length Waterline (LWL):
5.67 m
Beam:
2.49 m
Draft (Max):
1.22 m
Weight & Ballast
Displacement:
1,301 kg
Ballast:
363 kg
Sail Plan
Foresail Area:
11.91 m²
Mainsail Area:
10.87 m²
Sail Area:
22.78 m²
Sail Area (reported):
22.76 m²
I (Fore Triangle Height):
9.14 m
J (Fore Triangle Base):
2.61 m
P (Mainsail Hoist):
7.92 m
E (Boom Length):
2.74 m
Est. Forestay Length:
9.51 m
Engine & Systems
Performance Ratios
Hull Speed:
5.78 knots
SA/Displacement (Calc):
19.49
SA/Displacement (Reported):
19.47
Ballast/Disp Ratio:
27.89%
Displacement/Length:
198.97
Comfort Ratio:
13.95
Capsize Screening:
2.30
S-Number:
3.00
Immersion:
97 kg/cm
Notes
S&S design #2204.
Market Value
No pricing data available yet.
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