Defiant | |
---|---|
Role | Trainer and light attack aircraft |
National origin | Philippines |
Manufacturer | Philippine Aerospace Development Corporation |
Design group | Gold Wings Aviation |
Built by | Gold Wings Aviation |
First flight | 22 February 1988 |
Status | Cancelled |
Primary user | Philippine Air Force |
Number built | 1 complete and 1 incomplete prototype |
The PADC Defiant was a trainer and light attack aircraft formerly developed by the Philippine Aerospace Development Corporation to reduce dependence on second-hand aircraft for the Philippine Air Force. [1]
In 1981, Gold Wings Aviation conceived an aircraft research and development undertaking called the Norlindo program, named after one of its first engineers. The program covered a progressive development of a high-performance trainer primarily intended for use by the PAF. The program was launched as an innovative step to build an aircraft of local design and utilizing indigenous materials. Gold Wings initiated preliminary design of a twin-engine turboprop named Norlindo and even began conceptual design of a turbojet trainer called Tinihaban Superstrike under the All-Filipino Technology Aircraft (AFTA) project. Out of these experiences, a single, piston engine trainer aircraft was conceived, designed, built and flown within three years.
The Defiant 300 prototype flew twice, the first on February 1987. [2] The Defiant project came out to be an excellent collaborative effort of a group of aeronautical engineers, aviation enthusiasts, government agencies and research institutions. The Ramos administration in 1997 renamed the Defiant project to Centennial and was given green light alongside the PADC Hummingbird helicopters. [3]
Based on the successful flights of the prototype, Gold Wings planned to build another prototype of a modified Defiant (appropriately named Defiant 500) with an all-metal airframe and power rating increased to 500 hp. Due to lack of financial support from the government, the plan did not push through, including another design of a light aircraft called Pegasus, which was presented to the Philippine Army as a contender for the proposed Philippine Army aviation arm. [4]
The two-seat tandem Defiant prototype (registered as RP-X239) was an exceptional technical arrangement of various systems and parts taken from different types of aircraft in the PAF inventory. The landing gears, flight controls and flaps motor were taken from the Beechcraft T-34 Mentor, seats from the Cessna U-17B, rudder and brake pedals from the Boeing-Stearman PT-13 and various instrument items from the Britten-Norman BN-2 Islander, T-34 Mentor, Sikorsky S-76 and SIAI-Marchetti SF.260. The Defiant was powered by a single Lycoming IO-540-K1B5 piston engine on loan from the PADC, the same engine that powers the BN-2 Islander. The prototype had the highest engine power rating of all the prototypes of local design flown so far.
Noteworthy were several original features designed and fabricated by the engines with technical support from several persons and companies. The airframe was fabricated from wood and fiberglass with a Lycoming engine. [5] The engine mount was fabricated from chrome molybdenum steel. Most significant of all was the fabrication and assembly of a one-piece plastic canopy. Fuel tanks were constructed with 5052-H34 aluminum alloys. Instrument panel, electrical, hydraulic and pitot-static systems were laid out with the help of reference books and articles. [4]
Data from Jane's All The World's Aircraft 1990–91 [7]
General characteristics
Performance
Related lists
The Piper PA-32 Cherokee Six is a series of single-engine, fixed landing gear, light aircraft manufactured in the United States by Piper Aircraft between 1965 and 2007.
The Britten-Norman BN-2 Islander is a British light utility aircraft and regional airliner designed and originally manufactured by Britten-Norman of the United Kingdom. Still in production, the Islander is one of the best-selling commercial aircraft types produced in Europe. Although designed in the 1960s, over 750 are still in service with commercial operators around the world. The aircraft is a light transport with over 30 military aviation operators around the world.
The Helio Courier is a cantilever high-wing light STOL utility aircraft designed in 1949.
The Pacific Aerospace Corporation CT/4 Airtrainer series is an all-metal-construction, single-engine, two-place with side-by-side seating, fully aerobatic, piston-engined, basic training aircraft manufactured in Hamilton, New Zealand.
The Bellanca 14-7 Cruisair and its successors were a family of single-engined light aircraft manufactured in the United States from the mid-1930s onwards.
The Berkut 360 is a tandem-seating, two-seat homebuilt canard aircraft with pusher configuration and retractable landing gear, built primarily of carbon fiber and fiberglass.
The Velocity XL is an American amateur-built aircraft, produced by Velocity, Inc. It is an enlarged version of their Velocity SE canard pusher design.
The Beechcraft Queen Air is a twin-engined light aircraft produced by Beechcraft in numerous versions from 1960 to 1978. Based upon the Twin Bonanza, with which it shared key components such as wings, engines, and tail surfaces, it had a larger fuselage, and served as the basis for the highly successful King Air series of turboprop aircraft. Its primary uses have been as a private aircraft, utility, and small commuter airliner. Production ran for 17 years.
The Bellanca Viking and Super Viking are a series of single-engine, four-seat, high performance, retractable gear aircraft manufactured in the USA during the 1960s and 1970s. The aircraft developed through modifications of classic designs by the aviation pioneer Giuseppe Bellanca. A total of 1,356 Vikings have been produced with most production between 1968 and 1975.
The PZL-105 Flaming (flamingo) is a Polish short-takeoff-and-landing (STOL) utility aircraft designed by PZL "Warszawa-Okęcie". It remained a prototype.
The Piper PA-36 Pawnee Brave is a 1970s American single-engined, low-wing, propeller-driven agricultural plane built by Piper Aircraft.
The Found FBA-2 is a 1960s Canadian four/five-seat cabin monoplane that was produced by Found Aircraft.
The Robin HR100 is a French four-seat light monoplane, designed by Chris Heintz and built by Avions Pierre Robin as metal-winged version of the Robin DR253 Regent.
The Procaer F.15 Picchio is an Italian-designed light utility aircraft built by Procaer.
The Ruschmeyer R 90 is a four-seat light aircraft designed and produced in Germany in the late 1980s and early 1990s.
The Terzi T30 Katana is an Italian single-seat competition aerobatic monoplane designed by the Milanese aeronautical engineer Pietro Terzi. Terzi built a limited series with his firm Terzi Aerodyne based in Milan, Italy.
The Jurca MJ-51 Sperocco is a plans-built two-seat tandem aerobatic aircraft derived from the Jurca MJ-5 Sirocco.
The Pipistrel Panthera is a lightweight, all-composite, highly efficient four-seat aircraft under development by Pipistrel of Slovenia.
The Aristocraft II was a six-place homebuilt aircraft designed by Terrence O'Neill.
The Trident TR-1 Trigull is a Canadian amphibious aircraft that was developed by Trident Aircraft of Burnaby, British Columbia and later Sidney, British Columbia. The aircraft was intended to be supplied as a complete ready-to-fly certified aircraft. The company encountered financial difficulties and only three prototypes were ever built.