Engineering:Cal 39

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Short description: Sailboat class
Cal 39
Cal 39 Logo.png
Class symbol
Development
DesignerC. William Lapworth
LocationUnited States
Year1970
No. built29
Builder(s)Jensen Marine/Cal Yachts
RoleRacer-Cruiser
Boat
Boat weight14,600 lb (6,622 kg)
Draft6.00 ft (1.83 m)
Hull
TypeMonohull
ConstructionFiberglass
LOA38.69 ft (11.79 m)
LWL31.25 ft (9.53 m)
Beam11.67 ft (3.56 m)
Engine typePerkins Engines 4108 diesel engine
Hull appendages
Keel/board typefin keel
Ballast6,600 lb (2,994 kg)
Rudder(s)skeg-mounted rudder
Rig
Rig typeBermuda rig
I (foretriangle height)50.00 ft (15.24 m)
J (foretriangle base)17.00 ft (5.18 m)
P (mainsail luff)41.75 ft (12.73 m)
E (mainsail foot)15.00 ft (4.57 m)
Sails
SailplanMasthead sloop
Mainsail area313.13 sq ft (29.091 m2)
Jib/genoa area425.00 sq ft (39.484 m2)
Total sail area738.13 sq ft (68.575 m2)

The Cal 39 is an American sailboat that was designed by C. William Lapworth as a racer-cruiser and first built in 1970. The boat was introduced just before the adoption of the International Offshore Rule (IOR) for racing and, as a consequence of not meeting that rule, saw low sales numbers. It was not in production long and was replaced by the Cal 39 Mark II.[1][2][3][4]

Production

The design was built by Jensen Marine/Cal Yachts (Bangor Punta) in the United States . The company built 29 examples of the type starting in 1970 and ending in 1971, but it is now out of production.[1][5]

Production of the design was cut short when first year sales did not match expectations, due to the boat not fitting the newly adopted IOR racing rules. It was replaced in the product line by the newly designed Cal 39 Mark II in 1978. The Mark II was later supplanted by the Cal 39 Mark III in 1983 and then the Cal 39 (Hunt/O'Day) in 1988. All four designs were sold as "Cal 39s".[1][4][6][7]

Design

The Cal 39 is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, a raked stem, a slightly raised counter reverse transom, a skeg-mounted rudder controlled by a wheel and a fixed fin keel. It displaces 14,600 lb (6,622 kg) and carries 6,600 lb (2,994 kg) of lead ballast. A tall rig was available, with a mast about 4 ft (1.2 m) higher.[1]

The boat has a draft of 6.00 ft (1.83 m) with the standard keel and 6.50 ft (1.98 m) with the optional deep draft keel.[1]

The boat is fitted with a British Perkins Engines 4108 diesel engine for docking and maneuvering. The fuel tank holds 35 U.S. gallons (130 L; 29 imp gal) and the fresh water tank has a capacity of 64 U.S. gallons (240 L; 53 imp gal).[1]


See also

Similar sailboats

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 McArthur, Bruce (2020). "Cal 39 sailboat". sailboatdata.com. Archived from the original on 29 May 2019. https://web.archive.org/web/20190529174102/https://sailboatdata.com/sailboat/cal-39. 
  2. McArthur, Bruce (2020). "C. William Lapworth". sailboatdata.com. Archived from the original on 30 September 2019. https://web.archive.org/web/20190930062148/https://sailboatdata.com/designer/lapworth-c-william. 
  3. Sherwood, Richard M.: A Field Guide to Sailboats of North America, Second Edition, pages 330-331. Houghton Mifflin Company, 1994. ISBN:0-395-65239-1
  4. 4.0 4.1 McArthur, Bruce (2020). "Cal 39 Mk II sailboat". sailboatdata.com. Archived from the original on 2 June 2019. https://web.archive.org/web/20190602072013/https://sailboatdata.com/sailboat/cal-39-mk-ii-1-147. 
  5. McArthur, Bruce (2020). "Jensen Marine/Cal Boats". sailboatdata.com. Archived from the original on 23 May 2019. https://web.archive.org/web/20190523191823/https://sailboatdata.com/builder/jensen-marinecal-boats. 
  6. McArthur, Bruce (2020). "Cal 39 Mk III sailboat". sailboatdata.com. Archived from the original on 18 October 2018. https://web.archive.org/web/20181018171806/https://sailboatdata.com/sailboat/cal-39-mk-iii. 
  7. McArthur, Bruce (2020). "Cal 39 (Hunt/O'Day) sailboat". sailboatdata.com. Archived from the original on 2 May 2019. https://web.archive.org/web/20190502151122/https://sailboatdata.com/sailboat/cal-39-huntoday.