JET ENGINES ARE USED BY MOST MILITARY and heavy aircraft, and by many Helicopters.The simplest type of jet engine or gas turbine is the turbojet.It work by continuous burning a mixture of fuel and air in a combustion chamber to produce a jet of hot exhaust gas, that is expelled through a nozzle to produce a thrust.The hot gas also spins the turbine blades,which ,in turn spin, the blades of an air compressor,the compressor forces air into...