Related developments Coandă-1910

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the 1910 coandă engine design used on sledge designed grand duke cyril of russia.


the additional turbo-propulseur patent application 13.502, dated 3 december 1910, implemented on double-seat motorised sled commissioned cyril vladimirovich, grand duke of russia. of despujols, boat maker, , motor manufacturer gregoire, coandă supervised building of motor sled, powered 30 hp (22 kw) gregoire engine driving turbo-propulseur. sledge blessed russian orthodox priests @ despujols plant near paris on 2 december 1910. starting next day, exhibited 2 weeks @ 12th automobile salon of france, alongside gregoire-powered automobiles on gregoire stand. number of automobile , general interest magazines published photographs or sketches of sledge. version of coandă s turbo-propulseur design shown second time in late 1910 @ grand palais of paris. 1 of periodicals reported expected speed of 60 mph (97 km/h), no account exists of sledge being tested.


coandă continued work on coandă-1910 project @ beginning of 1911, aiming improve stability, increase power of turbo-propulseur, , implement aerofoil improvements. applied new patents aerodynamic investigations , improvements of coandă-1910. coandă described different, more sturdy system attachment of wings, enabled changes in angle of attack , centre of gravity. aimed obtain more power propulsion system, , design drawings show arrangement of 2 air-cooled rotary engines on sides of fuselage. placement of engines indicates coandă did not intend inject fuel jet stream , ignite cooling of engines have been compromised. patent annotated additional claim on 19 july 1911 brought significant changes including addition of retractable landing gear dampers inside aerodynamic fairings skids, removal of horizontal stabiliser, supporting surface provided each engine , accessories covered improve aerodynamics. though coandă continued study rotary propulsion mechanisms, antoniu believes coandă never implemented practical solution because of lack of funds. in may 1911 coandă filed english-language patents on turbo-propulseur design in united kingdom , united states, second french-language patent filed in switzerland, , described 1911 publication of l annuaire de l air.


the expensive project of 1910, costing coandă 1 million francs, left him limited funds. possibility of new contract french government led coandă build coandă-1911. wished win army-organised competition @ reims in october, 1 required 2 engines in each aircraft fail-safe strategy. @ third aviation salon in paris 1911, coandă displayed scale model of aircraft used 2 gnome rotary engines mounted back, connected bevel gear single two-bladed propeller. combination of 2 engines connected 1 propeller intended drive new turbine, coandă unable fund one. during trials assembly did not provide enough traction , four-bladed propeller ordered. mounting support of engines, intended jet propulsion version, not adequate new configuration forward chassis had modified. henri mirguet writing l aérophile magazine in january 1912 said new 1911 aircraft retained fuselage, frame , wing of coandă s 1910 design, did not keep turbo-propulseur or wooden wingloading surface including forward longitudinal ribs . aircraft flown on 21 october 1911, modest results latest modifications, related powerplant, did not compensate increased total weight of aircraft. @ military contest, did not meet requirement independent operation of each engine.


following 1911 exhibition, @ personal request of sir george white, coandă moved united kingdom take position chief engineer or chief designer @ british , colonial aeroplane company few years. in next 4 decades coandă worked on great variety of inventions. during world war ii revived earlier turbo-propulseur engine when contracted german army in late 1942 develop air propulsion system military ambulance snow sledges 1 made russian grand duke. german contract concluded after 1 year, yielding no plans production. though coandă had experimented variety of nozzles, , said had achieved degree of success, no turbojet-engine-style fuel injection or combustion in air stream attempted.


coandă , 1910 aircraft absent of aviation literature of day. none of annual issues of jane s world s aircraft ever mentioned coandă-1910 or turbo-propulseur powerplant. soviet engineer nikolai rynin made no mention of coandă in exhaustive nine-volume encyclopaedia on jet , rocket engines, written in late 1920s , 30s.








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