Merlin 1г—1 [ 1080p ]

: The first to feature a regeneratively cooled nozzle and combustion chamber. It powered the first privately developed rocket to reach orbit (Falcon 1 Flight 4) and early Falcon 9 flights.

: Based on the Apollo Lunar Module landing engine, this provides excellent stability and allows for deep throttling. Merlin 1Г—1

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

: One center Merlin engine is fired during the final landing burn to enable first-stage vertical landings. : The initial version used an expendable ablatively

: Drives both the LOX and RP-1 impellers. It also provides high-pressure fuel for hydraulic actuators , eliminating separate hydraulic systems.

: An upgraded variant of the 1A with a more powerful turbine; it was never used on a flight vehicle before SpaceX shifted to regenerative cooling.