fbpx
Wikipedia

Grob G 520

October 15, 2023

"Egrett" redirects here. For the bird, see Egret.

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 according 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 holder of several world records. Production was resumed in 2014.

Grob G 520
Grob G 520T
Role High-altitude and reconnaissance aircraft
Manufacturer Grob Aircraft
First flight 24 June 1987
Introduction 1991
Number built 6

Development Edit

 
G 520 in 1991

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,[1] 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.

 
inflight, showing the high wing aspect ratio

The initial D-450 EGRETT I development aircraft flew in 1987 and established three world records for altitude and time to climb in September 1988:

  • Time to climb to 15,000 metres (49,213 ft): 40 minutes 47 seconds[2]
  • Altitude in horizontal flight: 16,239 metres (53,278 ft)[3]
  • Altitude without payload: 16,329 metres (53,573 ft)[4]

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.[5] However, in February 1993, before much production had taken place, the process of procurement came under scrutiny when accusations of corruption (Amigo Affair) surrounding the former Bavarian Minister President Max Streibl became public. The program was subsequently cancelled when Eastern Europe ceased to be perceived as a threat.[5][6][7]

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.[8] 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.[9]

It was the first composite aircraft specifically designed for stratospheric research.

Design Edit

The G 520 is a fully composite conventional mid-wing monoplane with extremely high aspect ratio wings. Power is provided by a single turboprop Honeywell TPE 331-14F with a 4-blade Hartzell propeller, and it is equipped with a tricycle undercarriage, whose main units retract into fairings on the wings. The flexible payload-bay concept of the G 520 can accommodate multiple mission systems for both civilian and military applications and 12 payload compartments for up to 850 kg of mission equipment make the G 520 an ideal multi-role platform for a wide range of missions. The cockpit of the G 520T provides room for a pilot and a sensor operator as well as for equipment which has to be placed inside the pressurized cabin. The instrument panel can be optionally equipped with a digital glass cockpit IDU-680 EFIS by Genesys Aerosystems.

Variants Edit

G 520T Edit

The G 520T is a two-seater version of the G 520. Initially planned for training and demonstration purposes, the single G 520T built was repurchased by Grob Aircraft in 2014 and transferred to Germany in June 2014. The production of the G 520T will be resumed in 2014.

G 520NG Edit

The G 520NG will be the revised production version of the initial G 520T. According to company statements during Farnborough Airshow 2014 deliveries can start in 2016.[9]

Operational history Edit

  Australia
Airborne Research Australia

Operators Edit

  United States  Argentina
Perlan Project High altitude glider towing [10]

Specifications Edit

Data from Grob[11]

General characteristics

  • Crew: one
  • Capacity: one passenger / 850 kg (1,870 lb) payload
  • Length: 13.82 m (45 ft 4 in)
  • Wingspan: 33.0 m (108 ft 3 in)
  • Height: 5.66 m (18 ft 7 in)
  • Wing area: 39.67 m2 (427.0 sq ft)
  • Empty weight: 3,300 kg (7,275 lb)
  • Max takeoff weight: 4,700 kg (10,362 lb)
  • Fuel capacity: 1,070 kg (2,360 lb)
  • Powerplant: 1 × Honeywell TPE331-14F Turboprop aircraft engine, 560 kW (750 hp)
  • Propellers: 4-bladed Hartzell, 3.04 m (10 ft 0 in) diameter constant-speed propeller

Performance

  • Maximum speed: 469 km/h (291 mph, 253 kn) max. operating weight, MSL
  • Cruise speed: 283 km/h (176 mph, 153 kn) at 11,000 m (35,000 ft) ISA, MTOW
  • Stall speed: 107 km/h (67 mph, 58 kn) (MLW, landing configuration)
  • Range: 3,670 km (2,280 mi, 1,980 nmi) at 15,000 m (50,000 ft) ISA, MTOW, 45 min reserve fuel, 500 kg (1,100 lb) payload
  • Endurance: 7.5 hours at 15,000 m (50,000 ft) ISA, MTOW, 45 min reserve fuel, 500 kg (1,100 lb) payload
  • Service ceiling: 15,240 m (50,000 ft) (max. certified operating altitude)
  • Rate of climb: 7.3 m/s (1,440 ft/min)
  • Time to altitude: 50 min to 14,000 m (45,000 ft)
  • Take off distance over 15 m (50 ft): 670 m (2,200 ft) (MSL, ISA, MTOW, no wind, no slope)
  • Landing distance over 15 m (50 ft): 685 m (2,247 ft) (MSL, ISA, MTOW, no wind, no slope)

References Edit

 
Wikimedia Commons has media related to Grob G 520.

Notes Edit

  1. ^ Taylor 1996, p.172.
  2. ^ "Class C-1e (Landplanes: take off weight 3 000 to 6 000 kg) - Time to climb to a height of 15 000 m". Fédération Aéronautique Internationale. 1 September 1988.
  3. ^ "Class C-1e (Landplanes: take off weight 3 000 to 6 000 kg) - Altitude in horizontal flight". Fédération Aéronautique Internationale. 1 September 1988.
  4. ^ "Class C-1e (Landplanes: take off weight 3 000 to 6 000 kg) - Altitude". Fédération Aéronautique Internationale. 1 September 1988.
  5. ^ a b Lambert 1993, pp. 138–140.
  6. ^ Gerhard Hegmann: Grob baut deutschen Aufklärer – auch als Drohne, in Die Welt, 11 June 2014, access: 2021-09-19
  7. ^ Sebastian Steinke: Rekord-Schlepp: Mit der Grob Egrett in die Stratosphäre, in Aerokurier, 22 August 2018
  8. ^ TV documentation: Return of the G 520T http://www.br.de/mediathek/video/sendungen/abendschau-der-sueden/grob-flugzeug-mindelheim-100.html 2014-06-17 at the Wayback Machine
  9. ^ a b Farnborough: Return of the Grob Egrett http://www.flugrevue.de/militaerluftfahrt/kampfflugzeuge-helikopter/grob-egrett-kehrt-zurueck/581998 2014-07-26 at the Wayback Machine
  10. ^ "Tow to 42,000 feet". pelanproject.org. 23 August 2018. Retrieved 19 September 2021.
  11. ^ Grob Aircraft (n.d.). "Grob G 520 Technical Specifications". Retrieved 15 July 2014.

Bibliography Edit

  • Lambert, Mark (1993). Jane's All The Worlds Aircraft 1993–94. Coudsdon, UK: Janes's Data Division. ISBN 0-7106-1066-1.
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 924.
  • Taylor, Michael (1996). Brassey's World Aircraft & Systems Directory 1996/97. London: Brassey's. ISBN 1-85753-198-1.
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 895 Sheet 14.

External links Edit

 
Wikimedia Commons has media related to Grob G 520.
  • G 520 official website
  • Grob Aircraft official website

October 15, 2023
grob, egrett, redirects, here, bird, egret, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books,. Egrett redirects here For the bird see Egret This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Grob G 520 news newspapers books scholar JSTOR December 2012 Learn how and when to remove this template message 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 according 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 holder of several world records Production was resumed in 2014 Grob G 520Grob G 520TRole High altitude and reconnaissance aircraftManufacturer Grob AircraftFirst flight 24 June 1987Introduction 1991Number built 6 Contents 1 Development 2 Design 3 Variants 3 1 G 520T 3 2 G 520NG 4 Operational history 5 Operators 6 Specifications 7 References 7 1 Notes 7 2 Bibliography 8 External linksDevelopment Edit nbsp G 520 in 1991The 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 1 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 Luftgestutztes abstandsfahiges Primar Aufklarungssystem 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 nbsp inflight showing the high wing aspect ratioThe initial D 450 EGRETT I development aircraft flew in 1987 and established three world records for altitude and time to climb in September 1988 Time to climb to 15 000 metres 49 213 ft 40 minutes 47 seconds 2 Altitude in horizontal flight 16 239 metres 53 278 ft 3 Altitude without payload 16 329 metres 53 573 ft 4 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 5 However in February 1993 before much production had taken place the process of procurement came under scrutiny when accusations of corruption Amigo Affair surrounding the former Bavarian Minister President Max Streibl became public The program was subsequently cancelled when Eastern Europe ceased to be perceived as a threat 5 6 7 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 8 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 9 It was the first composite aircraft specifically designed for stratospheric research Design EditThe G 520 is a fully composite conventional mid wing monoplane with extremely high aspect ratio wings Power is provided by a single turboprop Honeywell TPE 331 14F with a 4 blade Hartzell propeller and it is equipped with a tricycle undercarriage whose main units retract into fairings on the wings The flexible payload bay concept of the G 520 can accommodate multiple mission systems for both civilian and military applications and 12 payload compartments for up to 850 kg of mission equipment make the G 520 an ideal multi role platform for a wide range of missions The cockpit of the G 520T provides room for a pilot and a sensor operator as well as for equipment which has to be placed inside the pressurized cabin The instrument panel can be optionally equipped with a digital glass cockpit IDU 680 EFIS by Genesys Aerosystems Variants EditG 520T Edit The G 520T is a two seater version of the G 520 Initially planned for training and demonstration purposes the single G 520T built was repurchased by Grob Aircraft in 2014 and transferred to Germany in June 2014 The production of the G 520T will be resumed in 2014 G 520NG Edit The G 520NG will be the revised production version of the initial G 520T According to company statements during Farnborough Airshow 2014 deliveries can start in 2016 9 Operational history Edit nbsp Australia Airborne Research AustraliaOperators Edit nbsp United States nbsp Argentina Perlan Project High altitude glider towing 10 Specifications EditData from Grob 11 General characteristicsCrew one Capacity one passenger 850 kg 1 870 lb payload Length 13 82 m 45 ft 4 in Wingspan 33 0 m 108 ft 3 in Height 5 66 m 18 ft 7 in Wing area 39 67 m2 427 0 sq ft Empty weight 3 300 kg 7 275 lb Max takeoff weight 4 700 kg 10 362 lb Fuel capacity 1 070 kg 2 360 lb Powerplant 1 Honeywell TPE331 14F Turboprop aircraft engine 560 kW 750 hp Propellers 4 bladed Hartzell 3 04 m 10 ft 0 in diameter constant speed propellerPerformance Maximum speed 469 km h 291 mph 253 kn max operating weight MSL Cruise speed 283 km h 176 mph 153 kn at 11 000 m 35 000 ft ISA MTOW Stall speed 107 km h 67 mph 58 kn MLW landing configuration Range 3 670 km 2 280 mi 1 980 nmi at 15 000 m 50 000 ft ISA MTOW 45 min reserve fuel 500 kg 1 100 lb payload Endurance 7 5 hours at 15 000 m 50 000 ft ISA MTOW 45 min reserve fuel 500 kg 1 100 lb payload Service ceiling 15 240 m 50 000 ft max certified operating altitude Rate of climb 7 3 m s 1 440 ft min Time to altitude 50 min to 14 000 m 45 000 ft Take off distance over 15 m 50 ft 670 m 2 200 ft MSL ISA MTOW no wind no slope Landing distance over 15 m 50 ft 685 m 2 247 ft MSL ISA MTOW no wind no slope References Edit nbsp Wikimedia Commons has media related to Grob G 520 Notes Edit Taylor 1996 p 172 Class C 1e Landplanes take off weight 3 000 to 6 000 kg Time to climb to a height of 15 000 m Federation Aeronautique Internationale 1 September 1988 Class C 1e Landplanes take off weight 3 000 to 6 000 kg Altitude in horizontal flight Federation Aeronautique Internationale 1 September 1988 Class C 1e Landplanes take off weight 3 000 to 6 000 kg Altitude Federation Aeronautique Internationale 1 September 1988 a b Lambert 1993 pp 138 140 Gerhard Hegmann Grob baut deutschen Aufklarer auch als Drohne in Die Welt 11 June 2014 access 2021 09 19 Sebastian Steinke Rekord Schlepp Mit der Grob Egrett in die Stratosphare in Aerokurier 22 August 2018 TV documentation Return of the G 520T http www br de mediathek video sendungen abendschau der sueden grob flugzeug mindelheim 100 html Archived 2014 06 17 at the Wayback Machine a b Farnborough Return of the Grob Egrett http www flugrevue de militaerluftfahrt kampfflugzeuge helikopter grob egrett kehrt zurueck 581998 Archived 2014 07 26 at the Wayback Machine Tow to 42 000 feet pelanproject org 23 August 2018 Retrieved 19 September 2021 Grob Aircraft n d Grob G 520 Technical Specifications Retrieved 15 July 2014 Bibliography Edit Lambert Mark 1993 Jane s All The Worlds Aircraft 1993 94 Coudsdon UK Janes s Data Division ISBN 0 7106 1066 1 Taylor Michael J H 1989 Jane s Encyclopedia of Aviation London Studio Editions p 924 Taylor Michael 1996 Brassey s World Aircraft amp Systems Directory 1996 97 London Brassey s ISBN 1 85753 198 1 World Aircraft Information Files London Bright Star Publishing pp File 895 Sheet 14 External links Edit nbsp Wikimedia Commons has media related to Grob G 520 G 520 official website Grob Aircraft official website Retrieved from https en wikipedia org w index php title Grob G 520 amp oldid 1155478731, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.