| Sonex Aircraft Onex | |
|---|---|
| Prototype of Sonex Aircraft Onex | |
| Role | Homebuilt aircraft |
| Manufacturer | Sonex Aircraft |
| Designer | John Monnett |
| First flight | 27 January 2011 |
| Status | In development/early flight testing |
| Number built | 2 prototypes [1] |
| Unit cost | USD$20,000[2] |
| Developed from | Sonex Aircraft Sonex |
The Onex (pronounced "One-X"[2]) is an American single-seat, low-wing aircraft first flown on 27 January 2011 and currently under development by Sonex Aircraft. The aircraft is intended to be produced as a kit for amateur construction.[2][3][4]
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The Onex design goals include that it will be economical, have aerobatic capabilities and folding wings, allowing storage in a standard 7 ft (2.1 m) high by 8 ft (2.4 m) wide residential garage.[4] The aircraft has been designed to standard light aircraft FAR-23 static load requirements with the wings supporting more than 10,000 pounds in sandbags during the tests.[5] Intended for the US experimental home-built and light-sport aircraft categories, the company anticipates that the total price to purchase and build the aircraft will be around US$20,000, making it the least expensive of their kits.[1][2]
While the first prototype was flown with conventional landing gear, a tricycle gear version is under development. The prototype was equipped with an AeroVee Volkswagen air cooled engine.[4]
In a February 2, 2011 webinar, Monett discussed many of technical aspects of the Onex, as well as providing a description of the early flight tests. The Onex is constructed from 6061 aluminum and features a single 15-gallon molded plastic fuel tank mounted in the fuselage, situated so the pilot can see the level of the fuel remaining. Monett claims that this type of tank is the safest and placing it in the fuselage, as opposed to in the wing, will reduce the chances of a fire in case of an accident. A further advantage of this configuration is that the fuel system will be gravity-fed and therefore not require a fuel pump, as it would if the tank were in the wings. Monett discussed the aim of simplicity and that a major goal is to reduce the parts count and thereby cost and weight. He also indicated that on the first test flight the aircraft climbed at 1200 ft per minute and was very responsive to the controls. Monett stated also that he had done some cursory testing of the flaps and found the 45° flap position to be very effective.[5]
Data from manufacturer’s website[2]
General characteristics
Performance
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