Focke-Wulf Fw 56 Stösser

The Focke-Wulf Fw 56 Stösser (German : goshawk) was a single-engine, parasol monoplane advanced trainer, built in the 1930s in Germany.

Fw 56
Focke-Wulf Fw 56
Role Advanced Trainer
Manufacturer Focke-Wulf
First flight November 1933
Primary user Luftwaffe
Number built ~1000
Developed into Focke-Wulf Fw 159
Focke-Wulf Fw 56 of the Spanish Republican Air Force training facility at El Carmolí in 1937

Development

The Fw 56 was developed, in accordance with a request by the Reich Air Ministry for an advanced fighter trainer, by Kurt Tank, chief engineer with Focke-Wulf. It was also considered for possible use as a home defence fighter.

The first prototype flew for the first time in November 1933. A second prototype had some modifications made to the fuselage, and metal rather than wooden wings for flight testing. The third prototype, which flew in February 1934, reverted to the wooden wing and satisfied the technical designers.

After comparison flights in 1935 against its two competitors - the Arado Ar 76 and the Heinkel He 74 - the Air Ministry ordered production to begin. About 1,000 aircraft were built, mostly used by Germany, though numbers were used by Austria and Hungary. A few were sold for private use, for instance to Gerd Achgelis, who later founded the helicopter company Focke-Achgelis with Henrich Focke.

Ernst Udet, an advocate of the use of dive bombers, demonstrated[1] the second prototype - Fw 56 V2 - in this role, leading to Luftwaffe development of dive bombers.

Design

The Fw 56 was a parasol-wing monoplane aircraft with a fuselage of steel tube construction, clad in metal at the front, and canvas elsewhere. The wing was of wood, covered mostly in plywood, while the trailing edge was fabric-covered. The fixed conventional undercarriage consisted of two cantilever main legs and a tailskid. The aircraft was powered by an air-cooled Argus inline engine and intended as a single-seat advanced trainer for the fledgling pilot trainee to transition to from the Bucher primary trainer. In addition, for its secondary role as an emergency fighter as well as aiding aspiring fighter pilot trainees in conversion, it was fitted with 2 fixed cowl-mounted 7.9mm MG17 machine guns as well as a removable ventral rack for 3 10kg bombs (inert practice bombs or, in the event, light antipersonnel fragmentation bombs)

The Fw 56 was highly popular with pilots,[2] due to its aerobatic capabilities and fine handling.

Variants
  • Fw 56a : First prototype.
  • Fw 56 V2 : Second prototype.
  • Fw 56 V3 : Third prototype.
  • Fw 56A-0 : Three preproduction aircraft.
  • Fw 56A-1 : Single-seat advanced trainer. Main production version.

Operators
 Austria
 Bolivia
  • Bolivian Air Force (1936 ex D-IBAE)
 Bulgaria
 Germany
 Hungary
 Netherlands
 Romania
 Spanish Republic
 Spain

Specifications (Fw 56A-1)
Focke-Wulf Fw 56

Data from Die Deutsche Luftrüstung 1933-1945[4]

General characteristics

  • Crew: one
  • Length: 7.6 m (24 ft 11 in)
  • Wingspan: 10.5 m (34 ft 5 in)
  • Height: 2.6 m (8 ft 6 in)
  • Wing area: 14 m2 (150 sq ft)
  • Empty weight: 755 kg (1,664 lb)
  • Gross weight: 985 kg (2,172 lb)
  • Powerplant: 1 × Argus As 10C inverted V-8 air-cooled piston engine, 176.5 kW (236.7 hp) (converted from PS)

Performance

  • Maximum speed: 278 km/h (173 mph, 150 kn) at sea level
  • Cruise speed: 255 km/h (158 mph, 138 kn)
  • Landing speed: 90 km/h (56 mph)
  • Range: 385 km (239 mi, 208 nmi)
  • Service ceiling: 6,200 m (20,300 ft)
  • Rate of climb: 8.42 m/s (1,657 ft/min)
  • Time to altitude: 1,000 m (3,281 ft) in 2.2 minutes

Armament

  • Guns: 2 × 7.92 mm (.312 in) MG 17 machine guns
  • Bombs: 3 x 10kg bombs on external ventral rack

See also

Related development

Aircraft of comparable role, configuration, and era

Related lists

References
  1. Munson, K. Fighters Between the Wars 1919-39 1977 p.144 ISBN 071370750X
  2. Munson, K. Fighters Between the Wars 1919-39 1977 p.144 ISBN 071370750X
  3. "Spanish Civil War Aircraft". Retrieved 2011-06-14.
  4. Nowarra, Heinz J. (1993). Die Deutsche Luftrüstung 1933-1945 : Band 2 Flugzeugtypen Erla-Heinkel. Vol. 2 (1st ed.). Switzerland: Bernard & Graefe Verlag. pp. 57–59 & 264–265. ISBN 3-7637-5466-0.
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