Saab 35 Draken

Saab 35 Draken
Blockhaj · CC BY-SA 4.0 · source
Name	Saab 35 Draken
Caption	Saab 35 Draken
Type	Interceptor / Fighter
Manufacturer	Saab
First flight	1955
Introduced	1959
Retired	2000s
Primary user	Swedish Air Force
Produced	1955–1974
Number built	654

Saab 35 Draken The Saab 35 Draken was a Swedish-built delta-wing fighter-interceptor developed by Saab AB during the Cold War to defend Sweden's airspace against high-speed threats. Designed under the direction of engineers influenced by work at Royal Institute of Technology (Stockholm), Royal Swedish Air Force Materiel Administration requirements and lessons from World War II and early Jet Age developments, the Draken combined a distinctive double-delta planform with a powerful Axial-flow turbojet to meet demanding performance and doctrine. Its introduction reshaped Luftfartsverket procurement thinking and influenced subsequent designs at Saab AB and other European firms.

Development and Design

Development began after Swedish planners commissioned studies at Royal Institute of Technology (Stockholm) and Saab responded to specifications issued by the Swedish Air Force in the early 1950s. Saab designers led by engineers who had contacts with technicians from Royal Aircraft Establishment and were aware of work at NASA concepts pursued a delta planform similar to experimental designs at Convair and influenced by aerodynamicists from Fokker and Hawker Siddeley. The Draken's double-delta layout—featuring an inner steeply swept section and an outer moderate-sweep panel—addressed requirements articulated by the Swedish Armed Forces for high-speed climb, low-speed handling, and short-field performance to operate from dispersed road bases like those exercised in Bas 60 and Bas 90 concepts. The prototype program, including test flights from Saab's facility and trials overseen by pilots from Swedish Air Force Flying School, led to refinements in airframe, inlet design, and landing gear to satisfy inspectors from the Royal Swedish Air Force Materiel Administration.

Technical Characteristics

The Draken used an axial-flow Rolls-Royce Avon derivative produced under licence by Svenska Flygmotor delivering afterburning thrust to achieve supersonic dash speeds required by Swedish intercept doctrine. The double-delta wing produced favorable lift at high angles of attack, drawing on wind-tunnel results from Royal Aircraft Establishment and research at KTH Royal Institute of Technology. Avionics suites evolved through service life with radar systems procured from suppliers linked to Ericsson and Televerket projects, while armament included RB 24 and RB 27 rockets and later adaptations for AIM-9 Sidewinder derivatives under licence. Structural materials combined high-strength aluminum alloys and titanium elements following metallurgy studies influenced by Bofors and Swedish industrial research. Landing gear and braking systems were tested against standards used by Försvarets Materielverks procurement teams to ensure compatibility with austere runways used in Bas 90 dispersal exercises.

Operational History

Entering service with the Swedish Air Force in 1959, the Draken assumed primary responsibility for high-altitude interception under the command structures of units such as F 10 Ängelholm and F 13 Bråvalla. Drakens conducted peacetime intercepts and scrambles during tensions involving Soviet Union air activity over the Baltic Sea and were scrambled during notable Cold War incidents that involved aircraft tracked by Swedish Air Defence radar nets. Export operators adapted training and maintenance practices drawing from manuals produced by Saab AB and shared logistical approaches with partners such as Danish Air Force and Austrian Air Force in later decades. Drakens remained in frontline or reserve service into the 1980s and beyond in secondary roles including target-towing and aggressor training at units connected to NATO partner exercises and bilateral programmes with Finland and other air arms.

Variants

Saab produced several major variants, including the initial single-seat interceptor series used by Flygvapnet and improved versions fitted with upgraded avionics and engines for export customers. Trainer variants incorporated dual controls for training squadrons at institutions such as Swedish Air Force Flying School and were employed by abroad operators for conversion training. Later modernisation packages retrofitted radar, cockpit displays and weapons pylons to adapt older airframes for evolving threats identified by defence analyses conducted by Försvarets Materielverk and academic teams at Stockholm School of Economics advising procurement projects.

Export and International Service

The Draken saw export sales and licensed production to several countries, most notably to the Austrian Air Force, Finnish Air Force, and Royal Danish Air Force, where modifications reflected local doctrine and procurement conducted through agencies like Defence Materiel Administration (Sweden). In Austria the Draken performed air policing and training missions after replacement of earlier types procured from Hawker Siddeley and Lockheed sources; in Finland Drakens integrated into squadrons that previously operated MiG-21 or Saab 29 Tunnan types. Drakens also participated in multinational exercises with NATO contingents including units from United States Air Force and trained with assets from Royal Air Force detachments during Cold War interoperability drills.

Legacy and Impact

The Draken influenced later Saab designs such as the Saab 37 Viggen and Saab JAS 39 Gripen through lessons in delta and double-delta aerodynamics adopted by engineers at Saab AB and researchers at KTH Royal Institute of Technology. Its operational service informed Swedish doctrines like Bas 60 and Bas 90, shaping force posture and dispersal strategies analyzed in studies by Swedish defence analysts at Totalförsvarets forskningsinstitut and academic centers. Preserved Drakens are displayed at institutions including the Flygvapenmuseum and private collections, and the type remains influential in historical studies by authors affiliated with Stockholm University and aviation historians from Royal Swedish Academy of War Sciences.

Category:Saab aircraft Category:Military aircraft of Sweden