Modern jetliners.

 The place at which once only wealthy could afford to go now change due to Modern jetliners which has enable ordinary people to travel to place there to. Modern once are much quieter, burn fuel more efficiently, and produce less air pollution than compared with the first jetliners (introduced in 1940s). Due to replacement of turbojet engines with turbofan engines, more advantage are created. Modern jetliners can carry more fuel and passengers within it than turbojet aircraft due greater power of turbofan engines at low speed enabled it. Once aircraft has take off for destination than without refueling a modern Boeing 747-400 which is also known as jumbo jet can fly with 400 people for 13700 km (8500 miles). By using fuel efficiently and by avoiding bad weather, jetliners can fly at high altitudes with a cruising level at 8000-11000 m (26000-36000 ft). Usually aircraft is controlled by the autopilot system, but pilot always controls the aircraft during take off and landing. Autopilot are complex such that they detect deviation of aircraft routes and makes appropriate adjustment to flight controls to maintain linearity of flight. Flight deck of this aircraft are equipped with radar that gives warning to pilot when there is hazard like bad weather, mountain ranges, and other aircraft.