Getafe Airfield was the site of the world’s first successful rotorcraft flight, on January 17, 1923. Lieutenant Alejandro Gómez Spencer piloted a C.4 Autogiro designed and built by Juan de la Cierva, who tested a series of autogiros between 1920 and 1924 at the Getafe site. Cierva’s autogiros introduced important technologies and flight techniques that led to the development of helicopters and other rotary wing aircraft. Getafe Air Base, established in 1911, now houses several training and transport units of the Spanish Air Force, as well as two aerospace manufacturing plants.
The integration of pump and turbine was the first of many to be installed in power-plant systems in the United States. It was the largest and most powerful in the world. As a "pump storage" unit in the Tennessee Valley Authority's system, it effected significant economies in the generation of electrical energy. The unit was designed by engineers of the Tennessee Valley Authority and the Allis-Chalmers Company. It was built by Allis-Chalmers.