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IMPULSE 21
Impulse 21 photo on sailboatdata.com
Impulse 21 drawing on sailboatdata.com
Hyde Sails Direct

Hull Type:  Fin w/spade rudder Rig Type:  Fractional Sloop
LOA:  21.00' / 6.40m LWL:  18.00' / 5.49m
Beam:  8.00' / 2.44m Listed SA:  208 ft2 / 19.32 m2
Draft (max.)  3.25' / 0.99m Draft (min.)  
Displacement:  1300 lbs./ 590 kgs. Ballast:  600 lbs. / 272 kgs.
Sail Area/Disp.1:  28.00 Bal./Disp.:  46.10% Disp./Len.:  99.51
Designer:  William Cook
Builder:  Impulse Marine / Johnson Boatworks (USA)
Construction:  FG Bal. type:  
First Built:  1986 Last Built:   # Built:  150
RIG AND SAIL PARTICULARS  KEY
I(IG):  23.50' / 7.16m J:  7.00' / 2.13m
P:  26.00' / 7.92m E:  9.70' / 2.96m
PY:   EY:  
ISP:  23.5' / 7.16m SPL/TPS:  8' / 2.44m
SA(Fore.):  82.25 ft2 / 7.64 m2 SA(Main):  126.10 ft2 / 11.71 m2
Sail Area (100% fore+main triangles):   208.35 ft2 / 19.36 m2
Sail Area/Disp.2:  28.04 Est. Forestay Length.:  24.52' / 7.47m
BUILDERS (past & present)
More about & boats built by:   Johnson Boat Works (USA)
DESIGNER
More about & boats designed by:   William Cook
URL:   groups.yahoo.com/group/Impulse21sailors
NOTES
Thanks to 'Warren' for providing updated information.
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