The Explorer Ellipse is an American

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 by Dean Wilson and produced by Explorer Aviation of

Grangeville, Idaho Grangeville is the largest city in and the county seat of Idaho County, Idaho, United States, in the north central part of the state. Its population was 3,141 at the 2010 census, down from 3,228 in 2000. Geography According to the United St ...

. When it was available the aircraft was supplied as a kit for amateur construction.Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 153. BAI Communications, 15 July 1998.

Design and development

The Ellipse 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 struts, 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 wings. A monoplane has inherently the highest efficiency and lowest drag of any wing config ...

that has an elliptical planform, a four-seat enclosed cabin with doors, fixed

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 ...

and a single engine in

tractor configuration In aviation, a tractor configuration is a propeller-driven fixed-wing aircraft with its engine mounted with the propeller in front, so that the aircraft is "pulled" through the air. This is the usual configuration; the pusher configuration ...

. The aircraft

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 ...

is made from welded

4130 steel 41xx steel is a family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common va ...

tubing with a wooden wing. The aircraft is covered in doped

aircraft fabric Aircraft fabric covering is a term used for both the material used and the process of covering aircraft open structures. It is also used for reinforcing closed plywood structures. The de Havilland Mosquito is an example of this technique, as are ...

. Its span wing, mounts flaps and has a wing area of . The wings can be folded in five minutes by one person to facilitate ground transportation or storage. The cabin width is . The acceptable power range is and the standard engine used is the

Lycoming O-320 The Lycoming O-320 is a large family of naturally aspirated, air-cooled, flat four engine, horizontally-opposed four-cylinder, direct-drive engines produced by Lycoming Engines. Introduced in 1953, it is commonly used on light aircraft such a ...

powerplant. With this powerplant the aircraft has a cruise speed of . The Ellipse has a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for crew/pilot, passengers and baggage is . The kit originally came with the complex wings already built and as a result the designer estimated the construction time from the supplied kit as 1000 hours. Float and

ski Skis are runners, attached to the user's feet, designed to glide over snow. Typically employed in pairs, skis are attached to ski boots with ski bindings, with either a free, lockable, or partially secured heel. For climbing slopes, ski skins c ...

fittings were included in the kit as standard equipment.

Operational history

By 1998 the company reported that three kits had been sold and one aircraft was flying. In December 2013 two examples were

registered Registered may refer to: * Registered mail, letters, packets or other postal documents considered valuable and in need of a chain of custody * Registered trademark symbol, symbol ® that provides notice that the preceding is a trademark or service ...

in the United States with the

Federal Aviation Administration The Federal Aviation Administration (FAA) is a Federal government of the United States, U.S. federal government agency within the United States Department of Transportation, U.S. Department of Transportation that regulates civil aviation in t ...

, although at one time four had been registered.

Specifications (Ellipse)

References

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Ellipse In mathematics, an ellipse is a plane curve surrounding two focus (geometry), focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. It generalizes a circle, which is the special ty ...

1990s United States sport aircraft 1990s United States civil utility aircraft Single-engined tractor aircraft High-wing aircraft Homebuilt aircraft Grangeville, Idaho