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Henri Coandă in 1967
Henri Marie Coandă ( ; June 7, 1886 – November 25, 1972) was a Romanianmarker inventor, aerodynamics pioneer and the builder of world's first jet powered aircraft, the Coanda-1910. He discovered and gave his name to the Coandă effect.


Born in Bucharestmarker, Coandă was the second child of a large family. His father was General Constantin Coandă, a mathematics professor at the National School of Bridges and Roads. His mother, Aida Danet, was the daughter of Frenchmarker physician Gustave Danet, and was born in Brittany. He was later to recall that even as a child he was fascinated by the miracle of wind.

Coandă studied at the Petrache Poenaru Communal School in Bucharest, then (1896) at the Liceu Sf. Sava (Saint Sava National Collegemarker). After three years (1899), his father, who desired a military career for him, had him transfer to the Military Lycee in Iaşimarker. He graduated from that institution in 1903 with the rank of sergeant major, and he continued his studies at the School of Artillery, Military, and Naval Engineering in Bucharest. Sent with an artillery regiment to Germanymarker (1904), he enrolled in the Technische Hochschule in Charlottenburgmarker, Berlinmarker.

Coandă graduated as an artillery officer, but he was more interested in the technical problems of flight. In 1905, he built a missile-aeroplane for the Romanian Army. He continued his studies (1907-1908) at the Montefiore Institute in Liègemarker, Belgiummarker, where he met Gianni Caproni. In 1908 Coandă returned to Romania to serve as an active officer in the Second Artillery Regiment. However, his inventor's spirit did not comport well with military discipline. He solicited and obtained permission to leave the army, after which he took advantage of his renewed freedom to take a long automobile trip to Isfahanmarker, Teheranmarker, and Tibet. Upon his return in 1909, he travelled to Parismarker, where he enrolled in the newly founded École Nationale Superieure d'Ingenieurs en Construction Aéronautique (now the École Nationale Supérieure de l'Aéronautique et de l'Espacemarker, also known as SUPAERO). One year later (1910) he graduated at the head of the first class of aeronautical engineers.

With the support of engineer Gustave Eiffel and the mathematician, politician, and aeronautical pioneer Paul Painlevé, he began experimenting the aerodynamic techniques: one of this experiments was mounting a device on a train running at 90 km/h so he could analyse the aerodynamic behavior. Another experiment used a wind tunnel with smoke and an aerodynamical balance to profile wings to be used in designing aircraft. This later led to the discovery of the aerodynamic effect now known as the Coandă effect.
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In 1910, using the workshop of Gianni Caproni, he designed, built and piloted the first 'thermojet' powered aircraft, known as the Coandă-1910, which he demonstrated publicly at the second International Aeronautic Salon in Paris. The powerplant used a 4-cylinder piston engine to power a compressor, which fed two burners for thrust, instead of using a propeller. It would be nearly 30 years until the next thermojet powered aircraft, the Caproni Campini N.1 (sometimes referred to as C.C.2).

At the airport of Issy-les-Moulineaux near Paris, Coandă lost control of the jet plane, which went off of the runway and caught fire. Fortunately, he escaped with just a good scare and some minor injuries to his face and hands. Around that time, Coandă abandoned his experiments due to a lack of interest and support on the part of the public and of scientific and engineering institutions.

Between 1911 and 1914, he worked as technical director of Bristol Aeroplane Company in the United Kingdommarker, where he designed several aeroplanes known as Bristol-Coanda Monoplanes. In 1912 one of these planes won the first prize at the International Military Aviation Contest in the UK.

In 1915, he went again to France where, working during World War I for Delaunay-Belleville in Saint-Denis, he designed and built three different models of propeller aeroplane, including the Coandă-1916, with two propellers mounted close to the tail; this design was to be reprised in the "Caravelle" transport aeroplane, for which Coandă was a technical consultant.

In the years between the wars, he continued traveling and inventing; inventions included the first jet-powered sleigh, and the first de luxe aerodynamic railroad train. In 1934 he was granted a French patent related to the Coandă Effect. In 1935, he used the same principle as the basis for a hovercraft called "Aerodina Lenticulara", which was very similar in shape to the flying saucer later developed by Avro Canada before being bought by the United States Air Force and becoming a classified project.

In 1969, during the first years of the Nicolae and Elena Ceauşescu era, he returned to spend his last days in his native Romaniamarker, where he served as director of the Institute for Scientific and Technical Creation (INCREST) and in 1971 reorganized, along with professor Elie Carafoli, the Department of Aeronautical Engineering of the Polytechnic University of Bucharest, spinning it off from the Department of Mechanical Engineering.

Coandă died in Bucharest November 25, 1972 at the age of 86.

Bucharest's Henri Coandă International Airportmarker is named after him.


"These airplanes we have today are no more than a perfection of a child's toy made of paper. In my opinion, we should search for a completely different flying machine, based on other flying principles. I imagine a future aircraft, which will take off vertically, fly as usual, and land vertically. This flying machine should have no moving parts. This idea came from the huge power of cyclones."

Inventions and discoveries

  • 1910: A mobile platform for aerodynamic experiments, mounted on the side of a train, running at 90 km/h on the Paris - Saint-Quentinmarker route. Effectively, this gave him a wind tunnel; using smoke and a photographic camera of his own design, he was able to test the stability of designs for aeroplane wings.
  • 1910: The Coandă-1910, the world's first thermojet aircraft (which crashed on its only demonstration).
  • 1911: A two-engine, one-propeller aeroplane.
  • 1911-1914 as technical director of Bristol Aeroplane Company, designed the Bristol-Coandă aeroplanes.
  • 1914-1916: at Delaunay-Belleville, designed three more types of aeroplane, including the Coandă-1916, with two motors near the tail.
  • He invented a new decorative material for use in construction, beton-bois; one prominent example of its use is the Palace of Culturemarker, in Iaşimarker.
  • 1926: Working in Romania, Coandă developed a device to detect liquids under ground, useful in petroleum prospecting. Shortly thereafter, in the Persian Gulfmarker region, he designed a system for offshore oil drilling.
  • Probably the most famous of Coandă's discoveries is the Coandă Effect. After the crash of the "Coandă-1910" aeroplane, the first jet propelled airplane in the world, Coandă observed that flames and incandescent gas emitted by the fire tended to remain close to the fuselage. After more than 20 years studying this phenomenon along with his colleagues, Coandă described what Albert Metral was later to name the "Coandă Effect". This effect has been utilized in many aeronautical inventions and is crucial to successful supersonic flight. See Coanda_Effect#Applications

Awards and medals

  • 1956: In New York, Coandă was honored as the inventor of the first jet aeroplane: one speaker lauded him as "the past, present and the future of aviation."
  • 1965: At the International Automation Symposium in New York, Coandă received the Harry Diamond Laboratories Award.
  • Award and Grand Gold Medal "Vielles Tiges".
  • UNESCOmarker Award for Scientific Research
  • The Medal of French Aeronautics, Order of Merit, and Commander ring

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