Why does the Soyuz cover its main engine?

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The discussion centers on the metal cover over the Soyuz main engine, which is mechanically moved aside before ignition. Participants speculate that its primary function may be to protect against micrometeorites and other debris that could damage the engine. Additionally, concerns are raised about preventing foreign objects and managing temperature gradients. The cover serves as a crucial safeguard for the engine's operation in space. Overall, the protective role of the cover is emphasized in maintaining the integrity of the Soyuz spacecraft.
Ganesh Ujwal
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As seen in Gravity, and also in this youtube video: , the Soyuz main engine is covered by a metal plate that it mechanically moved out of the way before firing. What is the function of this covering?
 
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That's a 20 minute video. I don't suppose you'd care to narrow down the segment in question?
 
(8:13)

My naive guess would be a micrometeorite cover.
 
Bandersnatch said:
(8:13)

My naive guess would be a micrometeorite cover.
That was my thought too. Lots of things you wouldn't want getting into your handbasket-to-home. Bolts, wrenches, vapour, huge temperature gradients.
 

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