1, gas turbine engine is a common aero-engine, which uses gas to generate thrust, with high thrust-to-weight ratio and high efficiency.

2. Ramjet engine is a kind of high-speed airflow engine, and its four processes of intake, compression, combustion and exhaust all occur in the same pipeline, which is mainly used for supersonic flight.

3. Piston engine is an engine that uses fuel combustion to drive the piston to move so as to generate power, which is mainly used for low-speed flight.

Engine development history

1. Piston engine: At the beginning of the 20th century, piston engine was the main power source of aircraft. It has the characteristics of low fuel consumption, low cost and reliable operation, but with the increase of aircraft flight speed, the power and weight of piston engine also increase rapidly, which restricts the increase of aircraft speed. Therefore, the piston engine is gradually replaced by the gas turbine engine.

2. Gas turbine engine: Gas turbine engine is an engine that uses gas to generate thrust, with high thrust-to-weight ratio and high efficiency. Including turbojet engine, turbofan engine, turboprop engine and turboshaft engine, among which turbojet engine is the most basic one.

3. Ramjet engine: Ramjet engine is a high-speed airflow engine. The four processes of air intake, compression, combustion and exhaust are in the same pipeline, which is mainly used for supersonic flight. Its advantages are simple structure, light weight and large thrust, but its disadvantage is narrow working range, which is usually only suitable for high-speed flight.