The disaster suffered by the Military Aviation Corps at the beginning of 1930 in its attempt to organise itself persisted afterwards as a consequence of the republican uprising of 15th December 1930 in Cuatro Vientos in the wake of which almost all the officers and commanders-in-chief with long experienced careers were killed. However, incredibly, the flight programme continued and Spanish aviators were at the centre of memorable flying achievements.

Among these achievements were the speed records set by Haya and Rodriguez for which Carlos Haya was awarded the Harmon Trophy for the year 1930 and the Diploma of Honour and Gold Medal of the International League of Aviators. At the beginning of 1931 and despite the dissolution decree of 8th January 1931, Haya continued his non-visibility flight training exercises. He almost always used a Loring R-III, dual seater reconnaissance plane which made its maiden flight in 1926 with a Hispano Suiza 500 CV engine and of which 110 models were built. Reaching a maximum height of 8,000 metres and a top speed of 235 km/h, the order commissioned in April 1927 was delivered between 1929 and 1930 and the plane remained in service until 1935. De Haya also flew the Avro 31. In October 1931, together with Sastre, he completed the Round Spain flight in a Mono-Aviceros light plane.
In November 1931 Lieutenant Haya ran the Non-Visibility Flight Course which was held in Cuatro Vientos and throughout the whole of that month, December and the rest of 1932, he devoted his time to “hooded” flights, flights in cloud, take off and landing without visibility and abnormal situations involving exiting from spirals and recovery manoeuvres, for which he was already using the “gyroscopic artificial horizon” that he himself had invented and went on to perfect.

All this information has been obtained from the following writings, books and encyclopaedias:
-Espasa-Calpe Encyclopaedia
- Aeronautical History Review (October 1989 issue nº 7/ November 1990 issue nº 8) R. de Madariaga.
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