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VIPER 640
Viper 640 photo on sailboatdata.com
Viper 640 drawing on sailboatdata.com

Hull Type:  Lifting Keel Rig Type:  Fractional Sloop
LOA:  21.08' / 6.43m LWL:  19.08' / 5.82m
Beam:  8.17' / 2.49m Listed SA:  211 ft2 / 19.6 m2
Draft (max.)  4.49' / 1.37m Draft (min.)  1.83' / 0.56m
Displacement:  750 lbs./ 340 kgs. Ballast:  220 lbs. / 100 kgs.
Sail Area/Disp.1:  40.96 Bal./Disp.:  29.41% Disp./Len.:  48.20
Designer:  Brian Bennett
Builder:  Viper Boats (USA)/Rondar (UK)
Construction:  FG Bal. type:  
First Built:  1996 Last Built:   # Built:  
RIG AND SAIL PARTICULARS  KEY
I(IG):  21.98' / 6.70m J:  7.48' / 2.28m
P:  25.62' / 7.81m E:  10.07' / 3.07m
PY:   EY:  
ISP:   SPL/TPS:  
SA(Fore.):  82.21 ft2 / 7.64 m2 SA(Main):  129.00 ft2 / 11.98 m2
Sail Area (100% fore+main triangles):   211.20 ft2 / 19.62 m2
Sail Area/Disp.2:  41.00 Est. Forestay Length.:  23.22' / 7.08m
BUILDERS (past & present)
More about & boats built by:   Rondar Raceboats
DESIGNER
More about & boats designed by:   Brian Bennett
RELATED LINKS
  Viper 640 Class Website  www.viper640.org/us
NOTES
Rondar Raceboats was appointed the class builder in 2005.
Asym. spin. area 425 sf.
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