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AMERICAN 21 (AMI)
Built by American Mariner Industries (USA)
• Designed by Arthur S. Henry
General Information
Hull Type:
Fin w/transom hung rudder
Rigging Type:
Masthead Sloop
Construction:
FG
First Built:
1979
Dimensions
Length Overall (LOA):
6.32 m
Length Waterline (LWL):
5.39 m
Beam:
2.39 m
Draft (Max):
0.66 m
Weight & Ballast
Displacement:
1,134 kg
Ballast:
408 kg
Sail Plan
Foresail Area:
9.87 m²
Mainsail Area:
8.33 m²
Total Sail Area (calculated):
18.20 m²
Sail Area (reported):
18.21 m²
I (Fore Triangle Height):
7.62 m
J (Fore Triangle Base):
2.59 m
P (Mainsail Hoist):
7.01 m
E (Boom Length):
2.38 m
Engine & Systems
Performance Ratios
Hull Speed:
5.63 knots
SA/Displacement (Calculated):
16.74
SA/Displacement (Reported):
17.07
Ballast/Disp Ratio:
36.00%
Displacement/Length:
202.29
Comfort Ratio:
13.40
Capsize Screening:
2.31
S-Number:
2.69
Notes
Also called AMERICAN 6.5.