airliners air transport 92 aircraft construction 90 history 56 military aircrafts 51 aircraft engines 21 air force 19 more ... turbo-prop engines 6 aircrafts 5 flight tests 5 military equipment transportation 4 transportation of troops 4 military transport 4 transportation accidents 2 heavier-then-air aircrafts 2 propulsion system 2 tankers 2 development 2 testing of machines 2 flight control 2 aerodynamics of airplanes 1 airplane machinists 1 certification 1 civil aviation 1 civilní letectví 1 traffic safety 1 construction 1 horses 1 cosmonautics 1 wings (aircraft) 1 less ...