AMERICAN 21

AMERICAN 21 drawing

Sailboat Specifications


Hull Type:
Lifting Keel
Rigging Type:
Masthead Sloop
LOA:
6.40 m
LWL:
5.39 m
Beam:
2.44 m
S.A. (reported):
19.42 m2
Draft (max):
1.22 m
Draft (min):
0.46 m
Displacement:
998 kg
Ballast:
249 kg
S.A./Disp.:
19.82
Bal./Disp.:
25.00
Disp./Len.:
178.02
Construction:
FG
Ballast Type:
Lead
First Built:
1973
Last Built:
# Built:
Builder:
American Fiberglass Corp.
Designer:
Ron Bertholf
Website:

Sailboat Calculations

S.A./Disp.:
19.82
Bal./Disp.:
25.00
Disp./Len.:
178.02
Comfort Ratio:
11.41
Capsize Screening Formula:
2.46

Rig and Sail Particulars

I:
7.65 m
J:
2.51 m
P:
7.04 m
E:
2.36 m
SPL/TPS:
ISP:
S.A. Fore:
9.62 m2
S.A. Main:
8.32 m2
S.A. Total (100% Fore + Main Triangles)
17.93 m2
S.A./Disp. (calc.):
18.30
Est. Forestay Len.:
8.05 m

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