|
__NOTOC__ The Grob G 520 is a turboprop long endurance, high altitude reconnaissance and surveillance aircraft built by Grob Aircraft with short runway capabilities and full approval for all-weather IFR/icing operations acc. to LBA/FAA Part 23 regulations. Developed and certified in 1991, the Grob G 520 is one of the world’s largest fully composite manned aircraft and a several world record holder, whose production is resumed in 2014. == History == The Grob G 520 ‘EGRETT’ (former Grob/E-Systems/AlliedSignal Egrett – its name is derived from the three companies involved in its design: E-Systems, Grob Aircraft, and Garrett,〔Taylor 1996, p.172.〕 the latter firm later changing its name to AlliedSignal) is a surveillance aircraft developed in Germany in the 1980s by an international partnership. It was intended to fill a joint German Air Force – US Air Force requirement for a high-altitude, long-duration surveillance platform for treaty verification and environmental monitoring. Known as "LAPAS" (''Luftgestütztes, abstandsfähiges Primär-Aufklärungssystem'', engl: airborne, long distance primary reconnaissance system) in Germany and "Senior Guardian" in the US, the program initially attempted to acquire the Lockheed TR-1 (U-2) for this role, but when this did not succeed, a new aircraft was sought. The initial ''D-450 EGRETT I'' development aircraft flew in 1987, and in September the following year set a class altitude record of 16,329.35 m (53,573.96 ft). Two pre-production machines followed in 1989 and 1990 as the ''D-500 EGRETT II'' and then fitted out to the finalized G 520 design in 1991. These latter two aircraft were owned by E-Systems and Grob respectively, and used for promotional purposes: E-Systems' for various sensor packages, and Grob's (renamed the Strato 1) to market the design to civil authorities as a resource management platform. In 1992, the German Air Force placed an order for production of nine EGRETT IIs, to be supplemented by G 520T two-seat trainer and one of the demonstrators.〔Lambert 1993, pp. 138–140.〕 However, in February 1993, before much production had taken place, the whole program was cancelled〔 when Eastern Europe ceased to be perceived as a threat. The two-seater-version G 520T was completed and sold to Airborne Research Australia in Adelaide. In 2014, Grob Aircraft repurchased the G 520T and flew it back to Germany.〔TV documentation: Return of the G 520T http://www.br.de/mediathek/video/sendungen/abendschau-der-sueden/grob-flugzeug-mindelheim-100.html〕 The repainted aircraft will be presented to the public during the Farnborough Airshow 2014, simultaneously as kick-off for resuming the production of the G 520T.〔Farnborough: Return of the Grob Egrett http://www.flugrevue.de/militaerluftfahrt/kampfflugzeuge-helikopter/grob-egrett-kehrt-zurueck/581998〕 The G 520 is a several world record holder as of 2014. This aircraft established three world records for altitude, time to climb in 1988. In addition, it was the first composite aircraft specifically designed for stratospheric research and reached a record altitude of 53,573.96 feet (16.329,35 meters).〔G 520 - Records http://grob-aircraft.com/index.php/records.html〕 *Time to climb to 15,000 meters: 40 minutes 47 seconds *Altitude in horizontal flight: 16,238.55 meters (53,276.09 feet) *Altitude without payload: 16,329.35 meters (53,573.96 feet) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grob G 520」の詳細全文を読む スポンサード リンク
|