The Hopfner HA-11/33 was an amphibious flying boat built in Austria in 1933 to a specification by the Dr. Oetker company. The result was a conventional, high-wing cantilever monoplane with a stepped flying boat hull and pontoons on struts under the wings at mid-span. The cabin was fully enclosed, and the twin engines were mounted tractor-fashion on struts above the wing.
A HA-11/33 was purchased by the Austrian Air Force, and was subsequently absorbed into the German Luftwaffe following the Anschluss. Deemed worthy of further development, WNF (which had absorbed Hirtenberg, which itself had taken over Hopfner) was tasked with developing it into a military training aircraft for flying boat pilots. Designated WNF Wn 11 by the RLM, testing was undertaken at Travemünde in 1940, but the type was not ordered into production. Development of a highly streamlined derivative with Hirth HM 508 engines, the WNF Wn 11C was also abandoned.
^"Hopfner HA 1133 = WNF Wn 11". Retrieved 14 January 2017.
Further readingedit
The Illustrated Encyclopedia of Aircraft. London: Aerospace Publishing. p. 2174.
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 510.
Nowarra, Heinz J. (1993). Die Deutsche Luftruestung 1933-1945 Vol.4 – Flugzeugtypen MIAG-Zeppelin (in German). Koblenz: Bernard & Graefe Verlag. p. 43. ISBN3-7637-5468-7.
External linksedit
Hopfner HA.11/33 Уголок неба. 2011
March 15, 2024
hopfner, amphibious, flying, boat, built, austria, 1933, specification, oetker, company, result, conventional, high, wing, cantilever, monoplane, with, stepped, flying, boat, hull, pontoons, struts, under, wings, span, cabin, fully, enclosed, twin, engines, we. The Hopfner HA 11 33 was an amphibious flying boat built in Austria in 1933 to a specification by the Dr Oetker company The result was a conventional high wing cantilever monoplane with a stepped flying boat hull and pontoons on struts under the wings at mid span The cabin was fully enclosed and the twin engines were mounted tractor fashion on struts above the wing HA 11 33 Wn 11Role Utility amphibianNational origin AustriaManufacturer Hopfner WNFDesigner Theodor HopfnerFirst flight 1933 Contents 1 Development 2 Specifications 3 References 4 Further reading 5 External linksDevelopment editA HA 11 33 was purchased by the Austrian Air Force and was subsequently absorbed into the German Luftwaffe following the Anschluss Deemed worthy of further development WNF which had absorbed Hirtenberg which itself had taken over Hopfner was tasked with developing it into a military training aircraft for flying boat pilots Designated WNF Wn 11 by the RLM testing was undertaken at Travemunde in 1940 but the type was not ordered into production Development of a highly streamlined derivative with Hirth HM 508 engines the WNF Wn 11C was also abandoned Specifications editData from 1 General characteristicsCrew 1 Capacity 3 pax Length 10 17 m 33 ft 4 in Wingspan 14 11 m 46 ft 4 in Height 3 15 m 10 ft 4 in Wing area 30 4 m2 327 sq ft Empty weight 1 100 kg 2 425 lb Gross weight 1 800 kg 3 968 lb Powerplant 2 Siemens Sh 14A 7 cylinder air cooled radial piston engines 93 kW 125 hp each Propellers 2 bladed wooden fixed pitch propellersPerformance Maximum speed 190 km h 120 mph 100 kn Cruise speed 160 km h 99 mph 86 kn Range 900 km 560 mi 490 nmi Service ceiling 4 500 m 14 800 ft References edit Hopfner HA 1133 WNF Wn 11 Retrieved 14 January 2017 Further reading editThe Illustrated Encyclopedia of Aircraft London Aerospace Publishing p 2174 Taylor Michael J H 1989 Jane s Encyclopedia of Aviation London Studio Editions p 510 Nowarra Heinz J 1993 Die Deutsche Luftruestung 1933 1945 Vol 4 Flugzeugtypen MIAG Zeppelin in German Koblenz Bernard amp Graefe Verlag p 43 ISBN 3 7637 5468 7 External links editHopfner HA 11 33 Ugolok neba 2011 Retrieved from https en wikipedia org w index php title Hopfner HA 11 33 amp oldid 1089067094, wikipedia, wiki, book, books, library,
