The St-Just Cyclone, also called the St-Just Cyclone 180, is a Canadian

homebuilt aircraft Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...

that was designed and produced by St-Just Aviation of Mirabel, Quebec. The company has since moved to

Boucherville, Quebec Boucherville is a city in the Montérégie region in Quebec, Canada. It is a suburb of Montreal on the South shore of the Saint Lawrence River. Boucherville is part of both the urban agglomeration of Longueuil and Montreal Metropolitan Communi ...

. While it was available the aircraft was supplied as a kit and in the form of plans for amateur construction.Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 126. BAI Communications, 15 July 1998. The Cyclone was later developed into the higher gross weight () St-Just Super-Cyclone, which superseded it in production.

Design and development

The Cyclone is a replica of the

Cessna 180 The Cessna 180 Skywagon is a four- or six-seat, fixed conventional gear general aviation airplane which was produced between 1953 and 1981. Though the design is no longer in production, many of these aircraft are still in use as personal aircr ...

that incorporates modifications and improvements, such as an extended wing span, greater wing area and vertically hinged doors. It features a

strut-braced 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 strut, which act in ...

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 planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

, a four-seat enclosed cabin accessed via doors, fixed

conventional landing gear Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail.Crane, Dale: ''Dictionary of Aeronautical Term ...

and a single engine in tractor configuration. The aircraft is made from sheet

aluminum Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It has ...

, with the kit

airframe The mechanical structure of an aircraft is known as the airframe. This structure is typically considered to include the fuselage, undercarriage, empennage and wings, and excludes the propulsion system. Airframe design is a field of aerospa ...

parts preformed with pilot holes to allow construction without the use of

jigs The jig ( ga, port, gd, port-cruinn) is a form of lively folk dance in compound metre, as well as the accompanying dance tune. It is most associated with Irish music and dance. It first gained popularity in 16th-century Ireland and parts o ...

. Its span wing employs a

NACA 2412 The National Advisory Committee for Aeronautics (NACA) was a United States federal agency founded on March 3, 1915, to undertake, promote, and institutionalize aeronautical research. On October 1, 1958, the agency was dissolved and its assets ...

airfoil An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine. ...

, mounts flaps and has a wing area of . The acceptable power range is and the standard engine used is the Continental O-470. The Cyclone has a typical empty weight of and a gross weight of , giving a useful load of . The manufacturer estimated the construction time from the supplied kit as 2000 hours.

Operational history

In December 2013, 23 examples were registered in Canada with

Transport Canada Transport Canada (french: Transports Canada) is the department within the Government of Canada responsible for developing regulations, policies and services of road, rail, marine and air transportation in Canada. It is part of the Transportati ...

and three in the United States with the

Federal Aviation Administration The Federal Aviation Administration (FAA) is the largest transportation agency of the U.S. government and regulates all aspects of civil aviation in the country as well as over surrounding international waters. Its powers include air traffic m ...

Specifications (Cyclone)

References

{{St-Just Aviation aircraft

Cyclone In meteorology, a cyclone () is a large air mass that rotates around a strong center of low atmospheric pressure, counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere as viewed from above (opposite to an anti ...

1990s Canadian civil utility aircraft Single-engined tractor aircraft High-wing aircraft Homebuilt aircraft Aircraft first flown in 1992