ALPA 21

ALPA 21 drawing

Sailboat Specifications


Hull Type:
Fin w/transom hung rudder
Rigging Type:
Masthead Sloop
LOA:
6.48 m
LWL:
5.67 m
Beam:
2.49 m
S.A. (reported):
22.76 m2
Draft (max):
1.22 m
Draft (min):
Displacement:
1,301 kg
Ballast:
363 kg
S.A./Disp.:
19.47
Bal./Disp.:
27.89
Disp./Len.:
198.97
Construction:
FG
Ballast Type:
First Built:
1976
Last Built:
# Built:
Builder:
Alpa (ITA)
Designer:
Sparkman & Stephens
Website:

Sailboat Calculations

S.A./Disp.:
19.47
Bal./Disp.:
27.89
Disp./Len.:
198.97
Comfort Ratio:
13.95
Capsize Screening Formula:
2.30

Rig and Sail Particulars

I:
9.14 m
J:
2.61 m
P:
7.92 m
E:
2.74 m
SPL/TPS:
ISP:
S.A. Fore:
11.91 m2
S.A. Main:
10.87 m2
S.A. Total (100% Fore + Main Triangles)
22.78 m2
S.A./Disp. (calc.):
19.49
Est. Forestay Len.:
9.51 m

Sailboat Links

Notes

S&S design #2204.

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