So here we go...
"The Lohner Pfeilflieger was the first tractor airplane of the Spanish Air Force. By then it was considered an advanced design, outclassing the Farman pushers and most monoplanes.
Aeronáutica Militar (the name given then to the Spainsh Air Force) acquired six Lohners during the spring/summer of 1913. Four of them formed the 1st escuadrilla leaded by Cpt. Kindelán, based in Tetuán in October. One of them was piloted by the Infant D. Alfonso de Orleans. Another one, flown by Captains Barrón and Cifuentes, made the first bombing mission in our story with real bombs (10k Carbonite bombs).
The Lohners were kept in service at Cuatro Vientos (the first military aerodrome in Spain, located near Madrid. Now it houses the Spanish Air Force Museum) up to 1917. They served as a base for the design of the Barrón Flecha (1915)"