Bertil Dillner (12 May 1923 in Lit

Jämtland Jämtland () is a historical provinces of Sweden, province () in the centre of Sweden in northern Europe. It borders Härjedalen and Medelpad to the south, Ångermanland to the east, Lapland, Sweden, Lapland to the north and Trøndelag and Norw ...

, Sweden – 9 May 2015 in

Linköping Linköping ( , ) is a city in southern Sweden, with around 167,000 inhabitants as of 2024. It is the seat of Linköping Municipality and the capital of Östergötland County. Linköping is also the episcopal see of the Diocese of Linköping (Chu ...

) was a Swedish aeronautical engineer and aerodynamic expert. He was significant in the development of

delta wing A delta wing is a wing shaped in the form of a triangle. It is named for its similarity in shape to the Greek uppercase letter delta (letter), delta (Δ). Although long studied, the delta wing did not find significant practical applications unti ...

aerodynamics and

supersonic Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately . Speeds greater than five times ...

flight concepts. Dillner served for many years as manager of

Boeing The Boeing Company, or simply Boeing (), is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, and missiles worldwide. The company also provides leasing and product support s ...

engineering design offices.

Biography

FFA

After graduation 1949, as

Master of Science A Master of Science (; abbreviated MS, M.S., MSc, M.Sc., SM, S.M., ScM or Sc.M.) is a master's degree. In contrast to the Master of Arts degree, the Master of Science degree is typically granted for studies in sciences, engineering and medici ...

Civil engineer A civil engineer is a person who practices civil engineering – the application of planning, designing, constructing, maintaining, and operating infrastructure while protecting the public and environmental health, as well as improving existing i ...

Aeronautic Aeronautics is the science or art involved with the study, design, and manufacturing of air flight-capable machines, and the techniques of operating aircraft and rockets within the atmosphere. While the term originally referred solely to ''ope ...

s at

KTH Royal Institute of Technology KTH Royal Institute of Technology (), abbreviated KTH, is a Public university, public research university in Stockholm, Sweden. KTH conducts research and education in Institute of technology, engineering and technology and is Sweden's largest te ...

Stockholm Stockholm (; ) is the Capital city, capital and List of urban areas in Sweden by population, most populous city of Sweden, as well as the List of urban areas in the Nordic countries, largest urban area in the Nordic countries. Approximately ...

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

he worked at the FFA, the Swedish

National Aeronautical Research Institute The National Aeronautical Research Institute (, FFA), was a former Swedish state governmental authority under the Ministry of Defence with the aim to conduct research, development and experimentation in the aeronautical field. The FFA was located ...

Saab

From 1954 to 1967 at

Saab AB Saab AB (originally , , acronym SAAB), with subsidiaries collectively known as the Saab Group (), is a Swedish aerospace and defense company, defence company primarily operating from Sweden. The company is headquartered in Stockholm, but its de ...

, he participated in the aerodynamic core of the projects for

Saab 35 Draken The Saab 35 Draken (; ''The Kite'', ambiguous with ''The Dragon'') is a Swedish interceptor aircraft, fighter-interceptor developed and manufactured by Saab AB, Svenska Aeroplan Aktiebolaget (Saab AB, SAAB) between 1955 and 1974. Development of ...

and

Saab 37 Viggen The Saab 37 Viggen (''The Tufted Duck'', ambiguous with ''The Thunderbolt'') is a single-seat, single-engine multirole combat aircraft designed and produced by the Swedish aircraft manufacturer Saab AB, Saab. It was the first Canard (aeronautic ...

, both cutting-edge technology during the

Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...

and the

Nuclear arms race The nuclear arms race was an arms race competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this same period, in addition to the American and Soviet nuc ...

. He worked under Erik Bratt and Tore Gullstrand, in the Saab design team with

Hermann Behrbohm Otto ''Hermann'' Bernhard Behrbohm, born 30 October 1907 in Karlsruhe, Grand Duchy of Baden, Imperial Germany; died 12 October 1977 in Fingelsham, Northbourne, Kent, United Kingdom, was a German mathematician active in Sweden and Germany. He ...

Olof Ljungström Gustaf Olof "Olle" Ljungström (1918–2013) was a Swedish engineer. He was a visiting professor in aircraft design process, aircraft design at Stanford University and the California Institute of Technology in the United States. Biography Olof ...

and Einar Bergström. In the shadow of the

and the

nuclear arms race The nuclear arms race was an arms race competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this same period, in addition to the American and Soviet nuc ...

the client, the

Swedish Air Force The Swedish Air Force ( or just ) is the air force Military branch, branch of the Swedish Armed Forces. History The Swedish Air Force was created on 1 July 1926 when the aircraft units of the Army and Navy were merged. Because of the escalatin ...

's desire in the 1950s to the 1970s (the Defence Act of 1958) was to be able to swiftly attack strategic

nuclear weapons A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either nuclear fission, fission (fission or atomic bomb) or a combination of fission and nuclear fusion, fusion reactions (thermonuclear weap ...

bombers A bomber is a military combat aircraft that utilizes air-to-ground weaponry to drop bombs, launch torpedoes, or deploy air-launched cruise missiles. There are two major classifications of bomber: strategic and tactical. Strategic bombing is ...

such as

Tupolev Tu-16 The Tupolev Tu-16 (USAF/DOD reporting name Type 39; NATO reporting name: Badger) is a twin-engined jet strategic heavy bomber used by the Soviet Union. It has been flown for almost 70 years. While many aircraft in Soviet service were retired af ...

before they reached their targets. This with really fast

fighter aircraft Fighter aircraft (early on also ''pursuit aircraft'') are military aircraft designed primarily for air-to-air combat. In military conflict, the role of fighter aircraft is to establish air supremacy, air superiority of the battlespace. Domina ...

such as

, where

speed In kinematics, the speed (commonly referred to as ''v'') of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a non-negative scalar quantity. Intro ...

and

preparedness Preparedness is a set of actions that are taken as precautionary measures in the face of potential disasters. Being prepared helps in achieving goals and in avoiding and mitigating negative outcomes. There are different types of preparedness, su ...

were the key factors. The

's need were also

landing operation A landing operation is a military operation during which a landing force, usually utilizing landing craft, is transferred to land with the purpose of power projection ashore. With the proliferation of aircraft, a landing may refer to amphibiou ...

-defenses over the surrounding seas with

attack aircraft An attack aircraft, strike aircraft, or attack bomber is a tactical military aircraft that has a primary role of carrying out airstrikes with greater precision than bombers, and is prepared to encounter strong low-level air defenses while pr ...

as well as ultra-fast

reconnaissance aircraft A reconnaissance aircraft (colloquially, a spy plane) is a military aircraft designed or adapted to perform aerial reconnaissance with roles including collection of imagery intelligence (including using Aerial photography, photography), signals ...

planes such as the

Economy An economy is an area of the Production (economics), production, Distribution (economics), distribution and trade, as well as Consumption (economics), consumption of Goods (economics), goods and Service (economics), services. In general, it is ...

and

materials engineering Materials science is an Interdisciplinarity, interdisciplinary field of researching and discovering materials. Materials engineering is an engineering field of finding uses for materials in other fields and industries. The intellectual origi ...

for

friction Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Types of friction include dry, fluid, lubricated, skin, and internal -- an incomplete list. The study of t ...

heat In thermodynamics, heat is energy in transfer between a thermodynamic system and its surroundings by such mechanisms as thermal conduction, electromagnetic radiation, and friction, which are microscopic in nature, involving sub-atomic, ato ...

of the

atmosphere An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosph ...

set the limit for speed. This generated large orders to build a very large

air force An air force in the broadest sense is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army aviati ...

and resources for

development Development or developing may refer to: Arts *Development (music), the process by which thematic material is reshaped * Photographic development *Filmmaking, development phase, including finance and budgeting * Development hell, when a proje ...

. Dillner and

made significant efforts in the design of

, and in particular the design and tests of the canard-wing construction.

Boeing

From 1967 to 1981, Dillner was employed by

Boeing Commercial Airplanes Boeing Commercial Airplanes (BCA) is a division of the Boeing Company. It designs, assembles, markets, and sells commercial aircraft, including the 737, 767, 777, and 787, along with freighter and business jet variants of most. The divis ...

Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...

, US to work with the supersonic

Boeing 2707 The Boeing 2707 was an American supersonic passenger airliner project during the 1960s. After winning a competition for a government-funded contract to build an American supersonic airliner, Boeing began development at its facilities in Seatt ...

SST passenger jet 1967–1972. At Boeing he also become involved with the aerodynamics of the extreme supersonic aviation at the re-entry of

Space Shuttle The Space Shuttle is a retired, partially reusable launch system, reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. ...

1971-1972 and Boeing Preliminary Design Group and ex QSRA transporter studies. Dillner was aerodynamic chief engineer at Boeing Commercial Airplanes 1972–1981. He also became an American citizen while in Seattle. From 1981 to 1988, Dillner was employed by

Boeing Defense, Space & Security Boeing Defense, Space & Security (BDS) is a division of Boeing, the Boeing Company based in Arlington, Virginia, near Washington, D.C. The division builds military Military aircraft, airplanes, Military helicopter, rotorcraft, and Missile, missil ...

in Seattle as aerodynamic chief engineer 1981-1985 and chief engineer 1985-1988 until his retirement. After retirement, he made some consulting assignments were made for

Aermacchi Aermacchi was an Italian aircraft manufacturer. Formerly known as Aeronautica Macchi, the company was founded in 1912 by Giulio Macchi at Varese in north-western Lombardy as Nieuport-Macchi, to build Nieuport monoplanes under licence for the It ...

and

Saab 2000 The Saab 2000 is a twin-engined high-speed turboprop airliner built by Swedish aircraft manufacturer Saab. It is designed to carry 50–58 passengers and able to cruise at a maximum speed of . Production took place in Linköping, Sweden. It ...

Compound life

He was active in the

American Institute of Aeronautics and Astronautics The American Institute of Aeronautics and Astronautics (AIAA) is a professional society for the field of aerospace engineering Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecra ...

and co-founder of their Aerodynamic Committee. Bertil Dillner chaired the Swedish Club North West between 1996 and 1997 and returned to Linköping and Sweden in 2005.

References

{{DEFAULTSORT:Dillner, Bertil People from Östersund Municipality 1923 births 2015 deaths Aircraft designers 20th-century Swedish engineers Boeing people Aerodynamicists Swedish civil engineers

Biography

FFA

Saab

Boeing

Compound life

See also

References