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The aircraft is a Spanish Delta Experimental Biplane.
Built in 1916.
The paddles are units in experimental lateral stability.
This biplane was nicknamed “El conejo” (“The Rabbit”), being developed for the Spanish government, which asked the “capitán de ingenieros” Eduardo Barrón to work on due to the parts shortage during World War I.
He took the Lohner Pfeilflieger (Flying Arrow) type of aircraft and and tested it with various engine models, including Hispano Suiza and Mercedes, which resulted in the aircraft known as “Barrón Flecha” that had most modifications in the engine and landing gear. He tried perform lateral stability tests and improved on “El conejo”, but with poor success. Afterward, he came out a newer aircraft, “Barrón W”, with a W-shaped lower wing so as to allow an observer to take aerial photographs without interference.
Recibió el sobrenombre de “El conejo”. Se trata de un desarrollo que el gobierno español pidió al capitán de ingenieros Eduardo Barrón para que, debido a la falta de repuestos por la 1ª guerra mundial, experimentara en las unidades Lohner Pfeilflieger de fabricación austriaca y conseguir que se fabricara por completo en España.
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