A turboprop engine is a type of gas turbine engine used in aircraft. Most of a turboprop engine's power is used to drive a propeller, and the propellers used are very similar to the propellers used in piston or reciprocating engine-driven aircraft (with the exception that turboprops usually use a constant velocity propeller). A turboprop engine is similar to a turbojet but has additional stages in the turbine to recover more power from the engine to turn the propeller. Turboprop engines are ge… (More on Turboprop)