// ORBITAL LOGISTICS AND PROPULSION TERM
MECO
MECO stands for Main Engine Cutoff, which is the point during a rocket's ascent when its primary engines shut down after burning all their fuel or reaching the desired velocity.
TECHNICAL DEFINITION
MECO (Main Engine Cutoff) is the critical event in a multi-stage launch vehicle's ascent where the primary propulsion engines cease operation, typically upon depletion of propellants or achievement of a specific velocity/altitude, preceding stage separation or orbital insertion.
BACKGROUND
The RS-25, also known as the Space Shuttle Main Engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is used on the Space Launch System.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Engine Shutdown
- Main Engine Shutdown
- Cutoff
- Thrust Termination
USAGE NOTE
MECO occurred exactly as planned, placing the upper stage on a precise trajectory.
DEVELOPERS
Organizations developing technology related to MECO.
Designs, manufactures, and launches advanced rockets and spacecraft. MECO (Main Engine Cut-Off) is a critical phase in all their orbital launch operations for Falcon 9, Falcon Heavy, and Starship.
Develops rocket engines, reusable launch vehicles like New Shepard and New Glenn, and in-space systems. MECO is an integral part of their launch vehicle design and mission profiles.
A joint venture of Boeing and Lockheed Martin, ULA provides launch services for the U.S. government using Atlas V and Vulcan Centaur rockets. MECO is a standard, critical event in all their missions.
A European launch service provider that operates the Ariane and Vega family of rockets. They manage and conduct launches where MECO is a key moment in the ascent trajectory.
Develops and launches small satellite launch vehicles, including the Electron and the upcoming Neutron rocket. MECO is a fundamental part of their rocket's flight sequence and orbital insertion maneuvers.
Japan's leading heavy industries manufacturer, MHI is responsible for the H-IIA/B and H3 launch vehicles. Their space division handles the design, development, and operation of these rockets, with MECO being a crucial phase.
Develops and produces launch vehicles such as Antares (for ISS resupply) and solid rocket motors, including those for the Space Launch System. MECO is relevant for their liquid-fueled rocket stages and their role in integrating propulsion systems.
India's national space agency, ISRO designs, develops, and operates its own launch vehicles (e.g., PSLV, GSLV). MECO is a standard and critical operational event in their rocket launches for achieving orbit.