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Each Falcon 9 booster uses nine Merlin engines, and the second stage uses one Merlin vacuum engine. The second stage is expended, so each launch consumes one Merlin Vacuum engine. SpaceX designed the booster with its engines to be recovered for reuse by propulsive landing, and the first recovered booster was reused in March 2017.
Merlin 1B had a somewhat more powerful turbo-pump, and generated more thrust, but was never flown on a flight vehicle before SpaceX's move to the Merlin 1C. Merlin 1D rocket engines on a Falcon 9 v1.1 launch vehicle in SLC-40 hangar, April 2014. The Merlin 1C was the first in the family to use a regeneratively-cooled nozzle and combustion chamber.
The second stage of the Falcon 9 has 1 short or regular nozzle, Merlin 1D Vacuum engine version. Falcon 9 is capable of losing up to 2 engines and still complete the mission by burning the remaining engines longer. Each Merlin rocket engine is controlled by three voting computers, each having 2 CPUs which constantly check the other 2 in the trio.
100,000 [9] 100 2.62: Engine-2 Vacuum ... Merlin 1D FT USA: SpaceX: Falcon 9 B5, Heavy: Active 1st RP-1 / ...
The Falcon 9 v1.1 features stretched first and second stages, and a new octagonal arrangement of the 9 Merlin-1D engines on the first stage (replacing the square pattern of engines in v1.0). SpaceX notes that the Falcon 9 v1.1 is cheaper to manufacture, and longer than v1.0.
[8] [9] It is powered by Merlin 1D engines burning rocket-grade kerosene and liquid oxygen (LOX). The main changes from Block 3 (the original Falcon 9 Full Thrust) to Block 5 are higher-thrust engines and improvements to the landing legs along with numerous other small changes to streamline recovery and re-use of first-stage boosters and ...
The FAA grounded the Falcon 9 rocket last week in order to investigate why a rocket booster from an uncrewed SpaceX mission tipped over and exploded early Wednesday upon returning to Earth.
The third version of the Falcon 9 was developed in 2014–2015 and made its maiden flight in December 2015. The Falcon 9 Full Thrust is a modified reusable variant of the Falcon 9 family with capabilities that exceed the Falcon 9 v1.1, including the ability to "land the first stage for geostationary transfer orbit (GTO) missions on the drone ship" [14] [15] The rocket was designed using ...