Focke-Wulf Fw 159

Focke-Wulf Fw 159
Name	Focke-Wulf Fw 159
Caption	Prototype monoplane fighter by Focke-Wulf
Type	Fighter prototype
Manufacturer	Focke-Wulf
First flight	1936
Primary user	Reichsluftfahrtministerium

Focke-Wulf Fw 159 was a German prototype single-seat fighter developed in the mid-1930s by Focke-Wulf Flugzeugbau under Reichsluftfahrtministerium direction during a period of rapid rearmament and aviation innovation in Europe. Conceived to meet Luftwaffe requirements alongside contemporaries such as the Messerschmitt Bf 109 and Heinkel He 112, the design embodied transitional features between biplane practice and modern monoplane fighters, reflecting influences from German, British, and American aeronautical developments. The Fw 159 programme illuminated tensions in procurement, aerodynamic research, and engine development that shaped pre-World War II aviation policy in Nazi Germany.

Design and development

Focke-Wulf assigned chief designers who had worked with companies like Albatros Flugzeugwerke and Junkers to produce a single-seat fighter to satisfy an RLM specification that also produced projects by Messerschmitt and Heinkel. Drawing on earlier Focke-Wulf projects and experience with the Focke-Wulf Fw 43 and liaison with the Technische Hochschule Berlin research teams, the Fw 159 incorporated an all-metal fuselage influenced by structural concepts from Henschel prototypes and streamlining studies conducted at the Deutsche Versuchsanstalt für Luftfahrt. Its fixed undercarriage and gull-wing arrangement were compromises between drag reduction and pilot visibility advocated by academics at Technische Universität München and engineers from BMW and Daimler-Benz engine groups. The Reichsluftfahrtministerium’s push for rapid adoption of monoplane fighters placed the Fw 159 in direct competition with the more radical cantilever designs championed by Willy Messerschmitt.

Prototypes and testing

The prototype series underwent flight trials at Focke-Wulf's facilities and Reichsluftfahrtministerium testing centres near Braunschweig and Rechlin. Instrumentation and handling evaluations drew on instrumentation methods from Luftfahrtforschungsanstalt Johannisthal and test pilots with experience from Luftwaffe pre-service trials. During comparative trials, the Fw 159 was evaluated against Heinkel He 112 prototypes and the early production Messerschmitt Bf 109B by RLM committees chaired by officials formerly attached to Luftverkehrs-Gesellschaft enterprises. Flight testing highlighted deficiencies in high-speed stability and engine cooling; these results echoed findings from contemporaneous trials of the Gloster Gladiator and Hawker Hurricane in other nations, prompting iterative changes. The programme encountered engine availability problems as BMW and Daimler-Benz allocation prioritised production fighters contracted by the RLM.

Operational history

The Fw 159 never reached operational service with frontline units of the Luftwaffe; its role remained confined to developmental trials and evaluation squadrons based at Rechlin and Luftwaffenversuchsanstalt. Political influence from industrialists associated with Messerschmitt AG and procurement decisions influenced by figures within the Reichsluftfahrtministerium curtailed mass production. Surplus airframes and components were absorbed into test schools and technical training establishments such as those at Fliegertechnische Schule locations, and some prototypes served in non-combat roles at Erprobungsstelle der Luftwaffe facilities. The Fw 159’s cancellation paralleled the RLM’s consolidation of fighter procurement around the Bf 109 and the He 112, reshaping German fighter inventory prior to the Spanish Civil War and the wider rearmament programmes of the late 1930s.

Technical description

The Fw 159 featured a single-engine, low-wing monoplane layout with mixed-construction stressed skin fuselage and fabric-covered control surfaces, reflecting structural practices also used by Junkers and Heinkel. Its fixed spatted undercarriage contrasted with retractable units fitted to designs by Messerschmitt; the fixed gear reduced mechanical complexity but increased drag compared to the Bf 109. Powerplant options evaluated included projects from BMW and Daimler-Benz that were undergoing development for other RLM contracts; engine cooling and cowling design were influenced by research at the Aerodynamische Versuchsanstalt. Armament provisions were for fuselage-mounted machine guns comparable to those specified for contemporaries such as the Gloster Gladiator and early Supermarine Spitfire prototypes, though production-standard weapons configurations were never finalized. Cockpit ergonomics and pilot visibility were informed by recommendations from Deutsche Versuchsanstalt für Luftfahrt and pilot committees drawn from operational units.

Variants

Prototype variants reflected incremental modifications to airframe and powerplant. Initial prototypes tested alternative wing dihedrals and gull-wing root fillets similar to practices at Henschel and Bücker, while later airframes incorporated revised cooling inlets developed in consultation with BMW engineers. Planned production variants were proposed to accept different engine installations, mirroring the multiple-engine strategy occasionally used by the RLM when parity among suppliers was desired, but none progressed beyond prototype or pre-production status due to procurement decisions favouring the Messerschmitt Bf 109.

Survivors and legacy

No intact Fw 159 airframe survives in museum collections; remnants and technical drawings were archived within Focke-Wulf records and later examined by historians at institutions such as the Deutsches Museum and Bundesarchiv. The Fw 159’s principal legacy lies in its contribution to aerodynamic data, structural techniques, and evaluation procedures that informed later Focke-Wulf designs and influenced training doctrine at Luftwaffe evaluation schools. Lessons learned fed into subsequent Focke-Wulf projects and the broader German fighter design community, intersecting with developments at firms like Heinkel, Junkers, and Messerschmitt and influencing interwar aviation scholarship at universities including Technische Universität Berlin and RWTH Aachen.

Category:Focke-Wulf aircraft