Author name: Gurupriya Dey Sarkar

The thermal efficiency for a rocket engine is expressed mathematically as: where: ηth​ is the thermal efficiency, Tv​ is the thrust produced by the engine, Vjet​ is the jet velocity, ​ṁp is the mass flow rate of Propellant, hc​ is the specific enthalpy of the fuel.

Aerojet Rocketdyne is a subsidiary of American defense company L3Harris Technologies that manufactures rocket, hypersonic, and electric propulsive systems for space, defense, civil and commercial applications. The thermal efficiency is expressed mathematically as: where: ηth​ is the thermal efficiency, Tv​ is the thrust produced by the engine, Vjet​ is the jet velocity, ​ṁp is the mass flow rate of Propellant, hc​ is the specific enthalpy of the fuel.

The SABRE (Synergetic Air-Breathing Rocket Engine) is a revolutionary engine concept designed by Reaction Engines Limited. It is intended to be a combined-cycle engine capable of operating as both a jet engine and a rocket engine. Due to its unique design, the traditional thermal efficiency formula for heat engines may not be directly applicable. In

The Lockheed C-130J Super Hercules is a military transport aircraft with turboprop engines. Turboprop engines are a type of gas turbine engine, and their thermal efficiency can be assessed using specific fuel consumption (SFC), which is the amount of fuel consumed per unit of thrust or power produced. The thermal efficiency is expressed mathematically as:

The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, all-weather stealth multirole fighters. Like other jet-powered aircraft, the thermal efficiency is not typically expressed through a direct formula as it would be for a heat engine. However, we can discuss relevant concepts and parameters. The thermal efficiency is expressed mathematically as: where:

The Lockheed Martin A-4AR Fightinghawk is a major upgrade of the McDonnell Douglas A-4M Skyhawk attack aircraft developed for the Argentine Air Force which entered service in 1998. The program was named Fightinghawk in recognition of the F-16 Fighting Falcon, which was the source of its new avionics. The thermal efficiency is expressed mathematically as: where: ηth​ is the thermal efficiency, Tv​ is the thrust produced by

The Lockheed Martin/Boeing F-22 Raptor is an American single-seat, twin-engine, supersonic all-weather stealth fighter aircraft developed for the United States Air Force (USAF). As a product of the USAF’s Advanced Tactical Fighter (ATF) program the aircraft was designed as an air superiority fighter, but also incorporates ground attack, electronic warfare, and signals intelligence capabilities. The prime contractor, Lockheed Martin, built most of the F-22’s airframe and weapons systems and conducted

The Lockheed F-117 Nighthawk is a retired American single-seat, subsonic twin-engine stealth attack aircraft developed by Lockheed‘s secretive Skunk Works division and operated by the United States Air Force (USAF). It was the first operational aircraft to be designed with stealth technology. The thermal efficiency is expressed mathematically as: where: ηth​ is the thermal efficiency, Tv​ is the thrust produced by the engine, Vjet​ is the jet velocity, ​ṁf is the

The General Dynamics F-16 Fighting Falcon is an American single-engine supersonic multirole fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF). Designed as an air superiority day fighter, it evolved into a successful all-weather multirole aircraft. Over 4,600 aircraft have been built since production was approved in 1976. The thermal efficiency is expressed mathematically as: where: ηth​ is the thermal efficiency, Tv​ is the thrust produced

The Lockheed F-104 Starfighter is an American single-engine, supersonic air superiority fighter which was extensively deployed as a fighter-bomber during the Cold War. Created as a day fighter by Lockheed as one of the “Century Series” of fighter aircraft for the United States Air Force (USAF), it was developed into an all-weather multirole aircraft in the early 1960s and produced by several other nations, seeing widespread service outside the United States.