VIPER 640
Hull
Lifting Keel
Rigging
Fractional Sloop
LOA
21,08 ft i.e. 6,43 m
LWL
19,08 ft i.e. 5,82 m
Sail Area
252 ft² i.e. 23,41 m²
Beam
8,17 ft i.e. 2,49 m
Displacement
700 lb i.e. 318 kg
Ballast
185 lb i.e. 84 kg
Max Draft
4,83 ft i.e. 1,47 m
Construction
Fiberglass
Ballast Type
N/A
First Built
1996
Last Built
400
Maker
N/A
Design
Brian Bennett
Make
N/A
Type
N/A
Fuel
N/A
Water
N/A
Headroom
N/A
Blue Water Value
-1,02
S.A. / Displ.
51,22
Bal. / Displ.
26,43
Displ. / Length
44,99
Comfort Ratio
3,35
Capsize Screening Formula
3,68
Hull Speed
5,85 kt
Pounds/Inch Immersion
556,99 pounds/inch
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