// PROPULSION SYSTEMS AND ENGINE TECHNOLOGY TERM
Solid Rocket Motor
A solid rocket motor is a type of rocket engine that uses a solid mixture of fuel and oxidizer, called propellant, contained within a casing. Once ignited, it burns continuously until all the propellant is consumed, generating thrust without the need for pumps or complex plumbing.

TECHNICAL DEFINITION
A solid rocket motor (SRM) is a chemical propulsion device that generates thrust from the combustion of a pre-mixed, contained solid propellant grain, typically composed of a fuel and oxidizer composite or double-base mixture, which upon ignition expels hot gases through a nozzle; characterized by its simplicity, high thrust-to-weight ratio, and non-throttleable operation.
BACKGROUND
Skyroot Aerospace Private Limited is a private Indian aerospace manufacturer and commercial launch service provider headquartered in Hyderabad, Telangana. The company was founded by former engineers and scientists from ISRO.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- SRM
- Solid Rocket Booster
- Solid Fuel Rocket
- Solid Propellant Motor
- Booster Rocket
USAGE NOTE
SRMs are frequently employed in military missiles, sounding rockets, and as strap-on boosters for liquid-fueled launch vehicles due to their robust design and long-term storage capabilities.
DEVELOPERS
Organizations developing technology related to Solid Rocket Motor.
A leading provider of solid rocket motors and advanced propulsion systems for space launch vehicles, missiles, and tactical weapon systems. They are a major contractor for NASA, the U.S. military, and commercial space programs.
Develops and manufactures solid rocket motors for strategic, tactical, and missile defense systems, as well as space launch vehicles. Their products include critical propulsion for various U.S. defense programs and NASA missions.
Through its subsidiary ArianeGroup (a joint venture with Airbus), Safran is a key player in solid rocket propulsion, developing and producing solid rocket motors for the European Ariane launch vehicles and various missile systems.
India's primary space agency, ISRO develops and utilizes solid rocket motors as strap-on boosters and stages for its Polar Satellite Launch Vehicle (PSLV) and Geosynchronous Satellite Launch Vehicle (GSLV) programs.
JAXA develops and operates solid-propellant rockets like the Epsilon launch vehicle, designed for efficient and reliable space access, and various sounding rockets for scientific research.
The primary contractor for the Chinese space program, CASC develops a wide range of solid rocket motors for its launch vehicles (e.g., Long March series), strategic missiles, and tactical weapon systems.
An Israeli defense technology company that develops and manufactures advanced solid rocket motors for a variety of missile systems, including air-to-air, air-to-surface, and surface-to-surface missiles.
As a major defense and aerospace company, Lockheed Martin integrates and contributes to the development of solid rocket motors for a vast array of its missile defense systems, tactical missiles, and space launch vehicles.