SpaceX Raptor Engines "BIG PROBLEM"...

SpaceX Raptor Engines "BIG PROBLEM"...
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#techalpha
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#elonmusk
#raptor
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SpaceX Raptor Engines "BIG PROBLEM"...
What exactly is holding Starship flights back from success?
The answer is the Raptor's reliability.
In fact, the Starship's engines in Flight 8 encountered problems that were the main cause of the explosion.
Let’s find out on today’s episode of Alpha Tech:
The Raptor engine remains one of the most technically complex components in SpaceX's entire Starship rocket program.
During Starship Flight 8, the initial performance of the Raptor engines appeared nominal following stage separation. As the second stage ignited, all six Raptor engines—three vacuum-optimized and three sea-level variants—lit successfully, providing the necessary thrust to continue Starship’s ascent.
At this phase of the flight, there were no immediate signs of failure. The engine plume appeared stable, with expected shock diamonds visible in the exhaust, indicating normal combustion. Telemetry showed consistent propellant flow and chamber pressure, suggesting that the modifications introduced in this version of Starship did not initially impact engine ignition or early operation.
SpaceX Raptor Engines "BIG PROBLEM"...
However, despite this strong start, a serious issue developed later in the burn.
During Starship Flight 8, onboard camera footage revealed a fire inside the engine skirt, near the vacuum Raptor engines. Initially, the engines appeared to be operating normally, but as the burn progressed, a noticeable red glow developed within the skirt, indicating the presence of flames. This fire seemed to originate in close proximity to the vacuum-optimized Raptors, raising concerns about potential leaks or thermal management issues.
One particularly concerning observation was the heat buildup on a specific vacuum Raptor located in the 2 o’clock position. The affected engine displayed a visible hot spot, suggesting that it was experiencing excessive thermal stress. This abnormal heating may have been an early indicator of a more serious problem developing within the engine bay.
SpaceX Raptor Engines "BIG PROBLEM"...
The most likely cause of the fire appears to be a leakage of methane or another propellant, which ignited inside the enclosed space of the engine skirt. Such leaks could stem from damaged plumbing, faulty seals, or structural vibrations affecting fuel lines. If propellant vapor accumulates in an area with high temperatures or exposed ignition sources, it could easily result in an uncontrolled fire. This issue is particularly concerning because it closely resembles the failure seen in Flight 7, suggesting that previous mitigation efforts may not have fully addressed the underlying cause.
Immediately after the first engine shut down, the remaining engines also failed, leading to a complete loss of thrust. The sequence of shutdowns suggests that the fire gradually spread and may have damaged critical engine components, disrupting proper combustion and forcing the engines to shut down prematurely.

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