The term TYPE OF PLANE can refer to four different types of aircraft: a propjet (7 letters), a turbojet (8 letters), an ASTRAL (6 letters), and a JET (3 letters), as well as a twinengine (10 letters). A propjet is a type of aircraft that uses a propeller to generate thrust, while a turbojet is a type of JET engine that uses a turbine to compress air and create thrust. An ASTRAL is a type of aircraft that uses a combination of both a propeller and a JET engine to generate thrust. A JET is a type of aircraft that uses a JET engine to generate thrust, while a twinengine is a type of aircraft that has two engines.