AMERICAN 21

AMERICAN 21 drawing

Sailboat Specifications


Hull Type:
Lifting Keel
Rigging Type:
Masthead Sloop
LOA:
21.00 ft
LWL:
17.67 ft
Beam:
8.00 ft
S.A. (reported):
209.00 ft2
Draft (max):
4.00 ft
Draft (min):
1.50 ft
Displacement:
2,200 lb
Ballast:
550 lb
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:
25.10 ft
J:
8.25 ft
P:
23.10 ft
E:
7.75 ft
SPL/TPS:
ISP:
S.A. Fore:
103.54 ft2
S.A. Main:
89.51 ft2
S.A. Total (100% Fore + Main Triangles)
193.05 ft2
S.A./Disp. (calc.):
18.30
Est. Forestay Len.:
26.42 ft

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