Focke-Wulf A 33

Focke-Wulf A 33 Sparrowhawk
The first A 33 with the serial number 91
Type:	Airliner
Design country:	German Empire
Manufacturer:	Focke-Wulf
First flight:	1930
Commissioning:	May 1930
Production time:	1930/1931
Number of pieces:	3

The Focke-Wulf A 33 Sperber is a German airliner built in the early 1930s by Focke-Wulf-Flugzeugbau AG in Bremen .

development

The A 33 was designed in 1930 at Focke-Wulf by the head of the construction department Paul Klages on his own responsibility and without an official building contract. A Czechoslovak Mars engine from Walter served as the drive . The target group was made up of rather smaller airlines , where they were to be used as an “ air taxi ”, ie as a business and touring aircraft . The need of the companies still struggling with the consequences of the global economic crisis was low, so that only three copies of the aircraft with the serial numbers 91, 97 and 115 were built, which between May 1930 and August 1931 as D–1851, D–1931and D–2153for the Norddeutsche Luftverkehrs AG , the Luftverkehrs GmbH in Rüstringen and the building authority Hamburg were approved. The latter was used as a photo and survey aircraft . The whereabouts of the three planes is unknown.

construction

The A 33 is a cantilevered shoulder- wing monoplane with a composite construction . The fuselage and tail unit consist of a tubular steel frame covered with fabric , the engine area of ​​the bow is planked with sheet metal. The continuous wing has a zanonia shape , the rigid chassis consists of the main wheels not connected to an axle and a grinding spur at the rear.

Technical specifications

Three-sided tear

Parameter	Data
crew	1
Passengers	3
length	9.65 m
span	12.00 m
height	3.00 m
Wing area	22.00 m²
Wing extension	6.5
Preparation mass	670 kg
Payload	450 kg
payload	250 kg
Takeoff mass	1120 kg
drive	an air-cooled nine-cylinder - radial engine
Type	Walter Mars
Starting power rated power	155 PS (114 kW) at 1800 rpm 145 PS (107 kW) at 1750 rpm
Top speed	165 km / h
Cruising speed	145 km / h
Landing speed	75 km / h
Rise time	8.0 min at 1000 m altitude
Service ceiling	3000 m
Range	500-600 km

literature

• Manfred Griehl: Focke-Wulf since 1925 . Motorbuch, Stuttgart 2009, ISBN 978-3-613-03006-0 , p. 27 .
• Karl-Dieter Seifert: German air traffic 1926–1945 - on the way to world traffic . In: German aviation . tape 28 . Bernard & Graefe, Bonn 1999, ISBN 3-7637-6118-7 , pp. 301/302 .
• Peter All-Fernandez (ed.): Aircraft from A to Z . tape 2 . Bernard & Graefe, Koblenz 1988, ISBN 3-7637-5905-0 , p. 241 .

Web links

Commons : Focke-Wulf A 33  - Collection of images, videos and audio files

Individual evidence

1. ^ René Scheer: AGO aircraft factories. From the lattice hull to the Me 262 . Dr. Ziethen, Oschersleben 2014, ISBN 978-3-86289-078-1 , p. 42 .
2. ^ Karl Ries: Research on the German aviation role. Part 1: 1919-1934 . Dieter Hoffmann, Mainz 1977, ISBN 3-87341-022-2 , p. 1134, 139 and 153 .