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CAL 21
Cal 21 photo on sailboatdata.com
Cal 21 drawing on sailboatdata.com
Hyde Sails Direct

Hull Type:  Swing Keel Rig Type:  Fractional Sloop
LOA:  20.50' / 6.25m LWL:  16.67' / 5.08m
Beam:  6.67' / 2.03m Listed SA:  196 ft2 / 18.21 m2
Draft (max.)  4.30' / 1.31m Draft (min.)  0.80' / 0.24m
Displacement:  1100 lbs./ 499 kgs. Ballast:  360 lbs. / 163 kgs.
Sail Area/Disp.1:  29.49 Bal./Disp.:  32.67% Disp./Len.:  106.01
Designer:  C. William Lapworth
Builder:  Jensen Marine (USA)
Construction:  FG Bal. type:  Iron
First Built:  1969 Last Built:  1972 # Built:  500
RIG AND SAIL PARTICULARS  KEY
I(IG):  23.00' / 7.01m J:  8.50' / 2.59m
P:  23.00' / 7.01m E:  8.50' / 2.59m
PY:   EY:  
ISP:   SPL/TPS:  
SA(Fore.):  97.75 ft2 / 9.08 m2 SA(Main):  97.75 ft2 / 9.08 m2
Sail Area (100% fore+main triangles):   195.50 ft2 / 18.16 m2
Sail Area/Disp.2:  29.41 Est. Forestay Length.:  24.52' / 7.47m
BUILDERS (past & present)
More about & boats built by:   Jensen Marine/Cal Boats
More about & boats built by:   Bangor Punta Corp.
DESIGNER
More about & boats designed by:   C. William Lapworth
NOTES
The original CAL 21 was equipped with a swing keel that could be completely raised inside a slot/cavity below the cockpit sole. When the keel was down, a plug was dropped into place to cover the opening and make a flush surface around the keel 'root'. A cable had to be attached or re-attached, to raise or lower the keel.
Besides reducing drag while sailing, the system allowed the hull to sit lower on a trailer.
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