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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 11
Role Utility amphibian
National origin Austria
Manufacturer Hopfner, WNF
Designer Theodor Hopfner
First flight 1933

Development


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.


Specifications


Data from [1]

General characteristics

Performance


References


  1. "Hopfner HA 1133 = WNF Wn 11". Retrieved 14 January 2017.

Further reading






На других языках


- [en] Hopfner HA-11/33

[fr] Hopfner HA-11/33

Le Hopfner HA-11/33 était un hydravion à coque amphibie, construit en Autriche en 1933.

[it] Hopfner HA-11/33

L'Hopfner HA-11/33, che successivamente assunse la designazione RLM WNF Wn 11, era un aereo anfibio a scafo centrale ed ala alta sviluppato dalla divisione aeronautica dell'azienda austriaca Hirtenberger Patronenfabrik (HP) nei primi anni trenta ed avviato alla produzione in serie dalla Wiener Neustädter Flughafenbetriebs GmbH.



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