A propulsion system is a device that uses Newton's third law of action and reaction to create a propelling or driving force to drive an item ahead. The push produced by the propulsion systems is utilized to accelerate both natural and manmade satellites. Air breathing and non-air breathing are the two basic categories of propulsion technologies. When someone breathes air, they use oxygen from the atmosphere to burn fuel. In missiles, aircraft, spacecraft, and unidentified aerial vehicles, the propulsion system is frequently used.
Recently government across world encourage the use of electric vehicles and alternative fuels, several countries were putting plans into action. To promote the production and purchase of electric automobiles, buses, and trucks, governments offered incentives such tax credits, subsidies, and rebates. The advancement of battery technology and charging infrastructure also supported by funding for research and development. For instance, in June 2023 Safran SA signed an agreement with Electra to develop 600 kW electric turbogenerator propulsion system for the prototype of Electra’s nine-passenger hybrid-electric short takeoff and landing (eSTOL) aircraft.