air transport 540 aircraft construction 214 history 155 aircrafts 155 airliners 96 helicopters 65 airports 50 more ... military aircrafts 46 aircraft engines 33 traffic safety 27 air force 24 transportation accidents 18 management 18 flight control 15 transport constructions 14 aerodynamics of airplanes 12 letectví 10 mass accidents 9 runways 9 supersonic aircrafts 9 emergency medicine 9 water transport 9 unscheduled air transport 8 osobnosti 8 turbo-prop engines 8 airships 8 flight tests 7 air traffic 7 air traffic control 7 aerodynamics 6 less ...