Focke-Wulf Fw 44 Stieglitz

Focke-Wulf
Industry	Aircraft manufacturing
Founded	1923
Headquarters	Bremen, Germany
Key people	Kurt Tank (designer)
Products	Aircraft, including the Fw 44 Stieglitz

The Focke-Wulf Fw 44 Stieglitz (Goldfinch) is a two-seat biplane developed and manufactured by the German company Focke-Wulf. It marked the firm's first significant achievement on the global stage.

This model employed a traditional biplane configuration with tandem open cockpits, each equipped with flight controls. Its wings were straight and untapered, complemented by fixed tailwheel landing gear. The aircraft was commonly powered by a Siemens-Halske Sh 14 radial engine. The design was overseen by Kurt Tank. Originally conceived as a trainer and sport aircraft, its prototype took flight in late 1932. Early challenges were addressed through design improvements, enabling the Fw 44 to execute aerobatic maneuvers and attracting prominent aviators.

Strong demand from flying schools and clubs both domestically and internationally led Focke-Wulf to establish a second production facility and authorize licensed manufacturing abroad. The Fw 44C variant, equipped with the Siemens-Halske Sh 14 radial engine, became the standard model. The aircraft also saw military deployment; notably, the Republic of China Air Force employed it in combat during the Second Sino-Japanese War, while the Luftwaffe operated numerous units before and throughout World War II.

Design and development

During the mid-1920s, Focke-Wulf initiated limited civil aircraft production, including models like the Focke-Wulf A 16. After merging with Albatros Flugzeugwerke in 1931 and with engineer Kurt Tank joining the team, work on the Fw 44 began.

The Fw 44 was designed as a single-bay biplane featuring strut-and-wire bracing and seating for two in tandem for training and sport flying. Its wings had equal spans with slight sweepback, stagger, and dihedral angles. The lower wings attached at the fuselage base, while the upper wings were supported by N-shaped interplane struts. Wing construction utilized wooden spars and ribs covered with fabric and plywood. The fuselage frame consisted of welded steel tubing with metal panels at the front section and fabric covering towards the rear.

The tail assembly combined fabric and plywood surfaces with an adjustable incidence angle. A duralumin bulkhead located behind the engine mount served to reduce fire hazards. Two fuel tanks were installed ahead of this bulkhead—one designed for inverted flight—and an additional tank stored lubricating oil. Both open cockpits accommodated seat-type parachutes, with a luggage compartment situated behind the rear cockpit.

The prototype completed its first flight in late summer 1932. Initial technical difficulties prompted modifications that enhanced flight performance and structural integrity, enabling aerobatic capability. Aviators such as Gerd Achgelis, Enrst Edet, and Emil Kopf demonstrated its performance.

Growing orders from flying schools and clubs led to establishing a second manufacturing plant. Customers spanning South America, Europe, and Asia acquired or arranged licensed local production of multiple Fw 44 variants.

The Fw 44B was powered by a 90 kW (120 hp) Argus As 8 four-cylinder inverted inline engine, distinguished by a more aerodynamic cowling design. The definitive Fw 44C reverted to using the Siemens-Halske Sh 14 radial engine. The concluding series, known as Fw 44J, was sold or licensed internationally.

Operational history

Between 1935 and 1936, the provincial government of Canton (Guangdong) acquired nineteen Fw 44 aircraft—comprising twelve Fw 44Fs and seven Fw 44Js—for its air force. Following Canton's loss of autonomy in July 1936, these planes were absorbed into the Nationalist Air Force. Adapted for combat roles, they took part in initial engagements during the Second Sino-Japanese War, with all units reportedly lost in action.

Numerous Fw 44Cs were utilized by the Luftwaffe, primarily for training purposes at Flugzeugführerschulen and Flugkriegsschulen throughout the Second World War.

Variants

Fw 44B
Fw 44C: This was the principal production model featuring slight modifications in equipment and powered by a seven-cylinder Siemens-Halske Sh 14a radial engine.
Fw 44D
Fw 44E
Fw 44F
Fw 44J: The ultimate production variant, equipped with a seven-cylinder Siemens-Halske Sh 14a radial engine.
I1AvN: The Fw 44J manufactured under license in Brazil by Fábrica do Galeão.

I.Ae. 23

From 1937 to 1942, Argentina's Fábrica Militar de Aviones (FMA) produced 190 FW-44J Stieglitz aircraft powered by the domestically developed I. Ae. Sh-14 engine, which was based on the Siemens Bramo Sh-14 design. These trainers served both the Argentine Military Aviation School and various aero clubs.

In 1944, the Instituto Aerotécnico introduced the I.Ae. 23, a variant constructed entirely from native woods to minimize import dependency, following the example of the I.Ae. 22 "DL" trainer. Known colloquially as the "Wooden Focke-Wulf," its maiden flight occurred on July 7, 1945. The I.Ae. 23 was utilized for pilot training and aerobatic displays and was outfitted with a Kodak photo gun. Despite its favorable reception, only one unit was produced due to a preference for British-made trainers acquired in 1946.