Warren CP-1
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The Warren CP-1, also called Miss Poly, Miss Polytechnic and the Warren Monoplane, was the second aircraft built by engineering students at California Polytechnic College, after their first project the Mason Greater Meteor.


Design and development

The CP-1 was built for Cal Poly instructor Martin C. Martinsen and completed in August 1929. It was a
high-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing config ...
conventional landing gear Conventional landing gear, or tailwheel-type landing gear, is an aircraft Landing gear, undercarriage consisting of two main wheels forward of the Center of gravity of an aircraft, center of gravity and a small wheel or skid to support the tail ...
equipped
monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing con ...
using dual airfoil-shaped
lift strut In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of struts, which act in ...
s. The fuselage is made of fabric-covered welded steel tubing, with wooden wing spars and ribs. The red, yellow and blue paint scheme was taken a from an earlier Berrylold Paint advertisement. An exhaust collector ring, larger rudder and low-pressure wheels and tires were added after construction.


Operational history

The CP-1 was licensed as an experimental aircraft and test flown from E.W. Clark Field in September 1929. It won a silver cup and two blue ribbons at the
California State Fair The California State Fair (CSF) is the annual state fair for the state of California. The fair is held at Cal Expo in Sacramento, California. The Fair is a 17-day event showcasing California's industries, agriculture, and diversity of people. Th ...
, and on 29 June 1930 reached a height of 18,200 ft to win a record for student-built aircraft. In 1932 the aircraft was sold back to Cal Poly to be used for aerial photographic survey and tail modifications. In 1934 its license expired with
fuselage The fuselage (; from the French language, French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds Aircrew, crew, passengers, or cargo. In single-engine aircraft, it will usually contain an Aircraft engine, engine as wel ...
and wing modifications planned. The disassembled aircraft was left in storage in the rafters of a building at Cal Poly.


Specifications (CP-1)


See also


References

{{reflist High-wing aircraft Single-engined tractor aircraft 1920s United States sport aircraft Aircraft first flown in 1929