Back to Results
Sign in to add to Favorites
Sign in to Add Price
VIPER 640
Built by Viper Boats (USA)/Rondar (UK)
• Designed by Brian Bennett
Help improve this yacht's listing by uploading your own images.
General Information
Hull Type:
Lifting Keel
Rigging Type:
Fractional Sloop
First Built:
1996
Number Built:
400
Dimensions
Length Overall (LOA):
6.43 m
Length Waterline (LWL):
5.82 m
Beam:
2.49 m
Draft (Max):
1.47 m
Draft (Min):
0.56 m
Weight & Ballast
Displacement:
318 kg
Ballast:
84 kg
Sail Plan
Foresail Area:
8.39 m²
Mainsail Area:
11.90 m²
Sail Area:
20.29 m²
Sail Area (reported):
23.41 m²
I (Fore Triangle Height):
6.61 m
J (Fore Triangle Base):
2.54 m
P (Mainsail Hoist):
7.81 m
E (Boom Length):
3.05 m
Est. Forestay Length:
7.08 m
Engine & Systems
Performance Ratios
Hull Speed:
5.85 knots
SA/Displacement (Calc):
44.39
SA/Displacement (Reported):
51.22
Ballast/Disp Ratio:
26.43%
Displacement/Length:
44.99
Comfort Ratio:
3.35
Capsize Screening:
3.68
S-Number:
10.03
Immersion:
99 kg/cm
Notes
Rondar Raceboats was appointed the class builder in 2005.
Market Value
No pricing data available yet.
Help the community by adding price information you know about this model.