Merlin 1г—1 May 2026

The consists of high-performance liquid rocket engines developed by SpaceX to power their Falcon 1 , Falcon 9, and Falcon Heavy rockets. Operating on a gas-generator open-cycle using RP-1 (rocket-grade kerosene) and liquid oxygen (LOX), they are renowned for their world-leading thrust-to-weight ratio and design for reusability. Key Variants and History

: One center Merlin engine is fired during the final landing burn to enable first-stage vertical landings. Merlin 1Г—1

: Based on the Apollo Lunar Module landing engine, this provides excellent stability and allows for deep throttling. : Based on the Apollo Lunar Module landing

: Uses a triple-redundant flight computer system on each engine to ensure high reliability during launch. It flew only twice on the Falcon 1 (2006–2007)

: The initial version used an expendable ablatively cooled carbon-fiber nozzle. It flew only twice on the Falcon 1 (2006–2007).