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ALPA 42
Built by Alpa (ITA)
• Designed by Sparkman & Stephens
General Information
Hull Type:
Fin with rudder on skeg
Rigging Type:
Staysail Ketch
Construction:
FG
First Built:
1973
Number Built:
8
Dimensions
Length Overall (LOA):
12.00 m
Length Waterline (LWL):
11.45 m
Beam:
3.43 m
Draft (Max):
1.85 m
Weight & Ballast
Displacement:
12,000 kg
Ballast:
4,500 kg
Sail Plan
Foresail Area:
32.50 m²
Mainsail Area:
27.37 m²
Total Sail Area (calculated):
59.87 m²
Sail Area (reported):
70.98 m²
I (Fore Triangle Height):
14.71 m
J (Fore Triangle Base):
4.42 m
P (Mainsail Hoist):
13.06 m
E (Boom Length):
4.19 m
Engine & Systems
Engine Make:
Diesel
Engine Model:
Perkins
Fuel Capacity:
201 L
Water Capacity:
401 L
Performance Ratios
Hull Speed:
8.21 knots
SA/Displacement (Calculated):
11.42
SA/Displacement (Reported):
13.82
Ballast/Disp Ratio:
37.50%
Displacement/Length:
222.71
Comfort Ratio:
42.71
Capsize Screening:
1.51
S-Number:
1.80
Notes
From the same hull mold used to built the ALPA 12.7 (1969).