aircraft | Fighter aircraft | aircraft carrier | Homebuilt aircraft | Sikorsky Aircraft | Consolidated Aircraft | Gloster Aircraft Company | United Kingdom military aircraft serials | Royal Aircraft Establishment | Douglas Aircraft Company | Aircraft registration | fighter aircraft | Anti-aircraft warfare | Jet aircraft | Hughes Aircraft Company | Fixed-wing aircraft | Fairchild Aircraft | Westland Aircraft | Vultee Aircraft | Stinson Aircraft Company | Piper Aircraft | Commonwealth Aircraft Corporation | Cargo aircraft | British Aircraft Corporation | Bell Aircraft | AviaBellanca Aircraft | aircraft registration | aircraft engine | Stearman Aircraft | Marine Aircraft Experimental Establishment |
By January 1961, 12 manufacturers, including Cessna, Hughes Tool Co. Aircraft Division, Hiller Aircraft and Bell Helicopters, had responded with 19 designs.