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In October 2012, SpaceX publicly announced concept work on a rocket engine that would be "several times as powerful as the Merlin 1 series of engines, and won't use Merlin's RP-1 fuel". [58] They indicated that the large engine was intended for a new SpaceX rocket, using multiple of these large engines could notionally launch payload masses of ...
Kestrel was a LOX/RP-1 pressure-fed rocket engine, and was developed by SpaceX as the Falcon 1 rocket's second stage main engine; it was used in 2006–2009. It was built around the same pintle architecture as SpaceX's Merlin engine but does not have a turbo-pump, and is fed only by tank pressure.
In April 2017, SpaceX CEO Elon Musk said that Block 5 will feature 7–8% more thrust by uprating the engines (from 176,000 pounds-force (780,000 N) to 190,000 pounds-force (850,000 N) per engine). [14] Block 5 includes an improved flight control system for an optimized angle of attack on the descent, lowering landing fuel requirements.
Furthermore, the Merlin shutdown transient was to be addressed by initiating shutdown at a much lower thrust level, albeit at some risk to engine reusability. The SpaceX team wished to work on the problem to avoid a recurrence as they changed over into the operational phase for Falcon 1. [54]
The pintle injector is known to have caused throat-erosion problems in the early ablatively cooled Merlin engines due to uneven mixing causing hot streaks in the flow, however, as of 2021, it is not clear whether this is a problem that applies to all pintle-based engines, or this was a design problem of the Merlin.
RS-27A—American RP-1/LOX engine first flown in 1990. [3] Vulcain—A family of European first stage engines using LH2/LOX flown on Ariane 5 and Ariane 6. [4] Merlin—RP-1/LOX engine developed by SpaceX for Falcon 9 and Falcon Heavy, used on both first and second stages. [5] RS-68—LH2/LOX engine built in the 1990s by Aerojet Rocketdyne ...
Moreover, for some engines (MCT, for example), we simply do not have sufficient public information released to warrant a separate article. It thus seems appropriate to create an article for SpaceX rocket engines where all engines, however related to SpaceX's existing engine families, are "in scope." N2e 19:22, 23 November 2012 (UTC)
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