What starts a jet engine?
What starts a jet engine? Gas turbine aircraft engines such as turbojets, turboshafts and turbofans often use air/pneumatic starting, with the use of bleed air from built-in auxiliary power units (APUs) or external air compressors now seen as a common starting method. Often only one engine needs be started using the APU (or remote compressor).
Why is kerosene used as jet fuel?
Lower Cost In some cases, kerosene may cost less than half the price of gasoline. Along with its lower freezing point, higher flash point and lower viscosity, this is one more reason why kerosene has become the preferred type of fuel in the aviation industry.
Why do birds destroy jet engines?
That impact displaces the blade such that it strikes another blade and a cascade can occur, resulting in engine failure. A 12-pound Canada goose striking an aircraft going 150 mph at lift-off generates the force of a 1,000-pound weight dropped from a height of 10 feet, according to Bird Strike Committee USA.
Why do jets dump fuel in the air?
Fuel dumping (or a fuel jettison) is a procedure used by aircraft in certain emergency situations before a return to the airport shortly after takeoff, or before landing short of the intended destination (emergency landing) to reduce the aircraft's weight.