In the turboprop engine a compressor is started by an
electric motor, this draws in air, compresses it and then passes it to a combustion
chamber.
In the combustion chamber it is mixed with fuel and ignited. The
hot gases produced expand and rush out through the blades of a
turbine.
The
turbine turns and this rotates the propeller which draws in more air. The drive shaft
could be fitted to the wheels of a car to give a gas turbine road
vehicle.
(See also Jet engine, Internal combustion engine, Diesel
engine)