The Potez 840 was an all-metal cantilever-wing monoplane with a retractable tricycle landing gear. It had a crew of three and a cabin for 18 passengers. It was powered by four 440 shp (328 kW) Turbomeca Astazou II turboprop engines. The prototype first flew on 29 April 1961; a second aircraft flew in June 1962 and had more powerful 600 shp (447 kW) Turbomeca Astazou XII engines. The second prototype carried out a sales tour of North America and it was planned to build a batch of 25 aircraft for Chicago-based Turbo Flight Inc. but only two more prototype aircraft were built, one for static testing.[1] The next two aircraft were designated the Potez 841 and were powered by 550 shp (417 kW) Pratt & Whitney Canada PT6A-6 turboprop engines. Another two modified Astazou-powered aircraft were produced, one in 1965 and one in 1967.
It was intended to build Potez 840s in a factory at Baldonnel Aerodrome in the Republic of Ireland with financial aid from the Government of Ireland but this factory was closed in 1968 without completing a single aircraft.[2][3] The former Potez factory at Baldonnel became an engine maintenance facility for the German airline Lufthansa with the factory finally closing in 2013.[4]
Service
The two Potez 841s were delivered to German customers in 1965, remaining in use until the mid 1970s. The first Potez 842 was operated by the French national civil pilot training school, Service de la Formation Aéronautique (SFA) from 1966 to 1976, while the second 842 was purchased by the Moroccan Ministry of Defense, being sold on in 1978.[5]
Variants
Potez 840
Astazou-powered variant, four built.
Potez 841
Production variant powered by 558 shp (416 kW) Pratt & Whitney PT6A-6 engines, two built.[5]
Potez 842
Production variant powered by 640 shp (480 kW) Turbomeca Astazou XII engines, two built.[5]
Potez 843
Unbuilt 1965 proposal with deeper fuselage and PT6 engines.[6]
The intact fuselage of a second is in the Shetland Islands. It suffered a wheels-up landing at Sumburgh Airport in 1981. Many years later the fuselage was recovered and moved to its current location at North Roe in 2007.[4][7]
Chillon, John; Dubois, J-P; Wegg, J (1980). French Post-War Transport Aircraft. Air-Britain (Publishers) Ltd. ISBN0-85130-078-2.
Dawydoff, Alex (August 1961). "From France: Potez 840 Light Transport". Flying. Vol. 69, no. 2. pp. 25, 88–89. Retrieved 17 November 2021.
"Potez 840 for RAF?". Air-Britain Aeromilitaria. Vol. 43. March 2017. p. 13. ISSN 0262-8791.
Taylor, John W. R. (1965). Jane's All The World's Aircraft 1965–66. London: Sampson Low, Marston.
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing. pp. 2776–7.
January 10, 2023
potez, 1960s, french, four, engined, passenger, executive, monoplane, last, aircraft, potez, name, aero, dienst, potez, munich, riem, airport, 1968, role, passenger, executive, transport, monoplanemanufacturer, potezfirst, flight, april, 1961produced, 1961, 19. The Potez 840 was a 1960s French four engined 18 passenger executive monoplane the last aircraft to use the Potez name Potez 840Aero Dienst Potez 841 at Munich Riem Airport 1968 Role 18 Passenger executive transport monoplaneManufacturer PotezFirst flight 29 April 1961Produced 1961 1967Number built 8 Contents 1 Development 2 Service 3 Variants 4 Survivors 5 Specifications Potez 842 6 See also 7 ReferencesDevelopment EditThe Potez 840 was an all metal cantilever wing monoplane with a retractable tricycle landing gear It had a crew of three and a cabin for 18 passengers It was powered by four 440 shp 328 kW Turbomeca Astazou II turboprop engines The prototype first flew on 29 April 1961 a second aircraft flew in June 1962 and had more powerful 600 shp 447 kW Turbomeca Astazou XII engines The second prototype carried out a sales tour of North America and it was planned to build a batch of 25 aircraft for Chicago based Turbo Flight Inc but only two more prototype aircraft were built one for static testing 1 The next two aircraft were designated the Potez 841 and were powered by 550 shp 417 kW Pratt amp Whitney Canada PT6A 6 turboprop engines Another two modified Astazou powered aircraft were produced one in 1965 and one in 1967 It was intended to build Potez 840s in a factory at Baldonnel Aerodrome in the Republic of Ireland with financial aid from the Government of Ireland but this factory was closed in 1968 without completing a single aircraft 2 3 The former Potez factory at Baldonnel became an engine maintenance facility for the German airline Lufthansa with the factory finally closing in 2013 4 Service EditThe two Potez 841s were delivered to German customers in 1965 remaining in use until the mid 1970s The first Potez 842 was operated by the French national civil pilot training school Service de la Formation Aeronautique SFA from 1966 to 1976 while the second 842 was purchased by the Moroccan Ministry of Defense being sold on in 1978 5 Variants EditPotez 840 Astazou powered variant four built Potez 841 Production variant powered by 558 shp 416 kW Pratt amp Whitney PT6A 6 engines two built 5 Potez 842 Production variant powered by 640 shp 480 kW Turbomeca Astazou XII engines two built 5 Potez 843 Unbuilt 1965 proposal with deeper fuselage and PT6 engines 6 Potez 880 Unbuilt military STOL version with four 917 shp 684 kW Turbomeca Bastan engines 6 Potez 881 Unbuilt civil version of 880 6 Survivors EditOne aircraft is displayed at the Musee de l air et de l espace in Paris 4 The intact fuselage of a second is in the Shetland Islands It suffered a wheels up landing at Sumburgh Airport in 1981 Many years later the fuselage was recovered and moved to its current location at North Roe in 2007 4 7 Potez 840 fuselage near North Roe Shetland Specifications Potez 842 EditData from Jane s All The World s Aircraft 1965 66 8 General characteristicsCrew 2 Capacity 24 passengers Length 15 89 m 52 ft 2 in Wingspan 19 60 m 64 ft 4 in Height 5 19 m 17 ft 0 in Wing area 35 0 m2 377 sq ft Aspect ratio 10 75 1 Airfoil NACA 63 modified Empty weight 5 430 kg 11 971 lb Max takeoff weight 8 900 kg 19 621 lb Fuel capacity 2 000 L 530 US gal 440 imp gal Powerplant 4 Turbomeca Astazou X turboprops 480 kW 640 shp each Propellers 3 bladed 2 07 m 6 ft 9 in diameterPerformance Maximum speed 500 km h 310 mph 270 kn at sea level Cruise speed 400 km h 250 mph 220 kn at 6 000 m 20 000 ft econ cruise Stall speed 135 km h 84 mph 73 kn Never exceed speed 610 km h 380 mph 330 kn Range 3 000 km 1 900 mi 1 600 nmi Service ceiling 8 000 m 26 000 ft Rate of climb 10 49 m s 2 065 ft min See also EditAircraft of comparable role configuration and era Cessna 620 de Havilland Heron Piper PA 35 PoconoReferences Edit Wikimedia Commons has media related to Potez 840 Notes Dawydoff Flying August 1961 p 25 Dail Eireann Volume 235 25 June 1968 Committee on Finance Vote No 40 Industry and Commerce Parliamentary Debates Office of the Houses of the Oireachtas 25 June 1968 Archived from the original on 7 June 2011 Retrieved 23 November 2009 Potez Irish Closure Flight International 8 August 1968 p 197 a b c Air Britain Aeromilitaria March 2017 p 13 a b c Chillon Dubois amp Wegg 1980 pp 98 99 a b c Chillon Dubois amp Wegg 1980 p 98 Pictures of crashed aircraft on Aviation Forum Taylor 1965 pp 51 52 BibliographyChillon John Dubois J P Wegg J 1980 French Post War Transport Aircraft Air Britain Publishers Ltd ISBN 0 85130 078 2 Dawydoff Alex August 1961 From France Potez 840 Light Transport Flying Vol 69 no 2 pp 25 88 89 Retrieved 17 November 2021 Potez 840 for RAF Air Britain Aeromilitaria Vol 43 March 2017 p 13 ISSN 0262 8791 Taylor John W R 1965 Jane s All The World s Aircraft 1965 66 London Sampson Low Marston Taylor Michael J H 1989 Jane s Encyclopedia of Aviation London Studio Editions The Illustrated Encyclopedia of Aircraft Part Work 1982 1985 Orbis Publishing pp 2776 7 Retrieved from https en wikipedia org w index php title Potez 840 amp oldid 1057186208, wikipedia, wiki, book, books, library,
