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IMPULSE 21
Built by Impulse Marine / Johnson Boatworks (USA)
• Designed by William Cook
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General Information
Hull Type:
Fin w/spade rudder
Rigging Type:
Fractional Sloop
First Built:
1986
Number Built:
150
Dimensions
Length Overall (LOA):
6.40 m
Length Waterline (LWL):
5.64 m
Beam:
2.44 m
Draft (Max):
0.99 m
Weight & Ballast
Displacement:
590 kg
Ballast:
272 kg
Sail Plan
Foresail Area:
7.51 m²
Mainsail Area:
11.72 m²
Sail Area:
19.23 m²
Sail Area (reported):
19.32 m²
I (Fore Triangle Height):
7.04 m
J (Fore Triangle Base):
2.13 m
P (Mainsail Hoist):
7.92 m
E (Boom Length):
2.96 m
SPL/TPS:
2.44 m
ISP:
7.16 m
Est. Forestay Length:
7.36 m
Engine & Systems
Performance Ratios
Hull Speed:
5.76 knots
SA/Displacement (Calc):
27.85
SA/Displacement (Reported):
28.00
Ballast/Disp Ratio:
46.15%
Displacement/Length:
91.66
Comfort Ratio:
6.54
Capsize Screening:
2.93
S-Number:
6.11
Immersion:
528.82 cm/kg
Notes
Also called the Impulse Eagle.
Market Value
No pricing data available yet.
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