Why does the Soyuz cover its main engine?

[Ganesh Ujwal]

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?

 

[DaveC426913]

That's a 20 minute video. I don't suppose you'd care to narrow down the segment in question?

 

[Bandersnatch]

(8:13)

My naive guess would be a micrometeorite cover.

 

[DaveC426913]

(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.

 

[pmacias]

The main engine of the Soyuz spacecraft is covered for several reasons. Firstly, the covering helps to protect the engine from any debris or particles that may be present during launch. This is important as even small particles can cause damage to the engine, which could potentially jeopardize the mission.

Secondly, the covering also helps to maintain the proper internal temperature of the engine. The Soyuz main engine uses a liquid propellant, which needs to be kept at a specific temperature in order to function properly. The covering helps to insulate the engine and keep it at the desired temperature.

Additionally, the covering also serves as a safety measure. In the event of an anomaly or malfunction during launch, the covering can help contain any potential explosions or fires that may occur at the base of the engine.

Furthermore, the covering also plays a role in the aerodynamics of the spacecraft. By covering the engine, it helps to reduce air resistance and improve the overall efficiency and stability of the spacecraft during launch.

Overall, the covering of the Soyuz main engine serves multiple functions and is an important safety and performance feature of the spacecraft.