Second stage reusability concept

Earl

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#1
This is a concept I thought of for the reuse of second stage engines (in real life). This probably has been discussed before, but I thought I would share my take on it. The purpose of this is to save the most expensive part of the second stage, the engines. It works as follows.
Screenshot_20200706-152148.png

The initial flight stage goes just as it would normally.
Screenshot_20200706-152200.png

Then, the engine detaches from the stage. This part is pretty much just the engine, some reaction control systems, a heat shield and some fuel.
Screenshot_20200706-152221.png

This smaller assembly enters the atmosphere protected by the heat shield.
Screenshot_20200706-152250.png

It then deploys its parachutes and lands safely. This is easier than landing the whole stage, and not to mention cheaper. It also wouldn't consume too much fuel or add too much mass, meaning the efficiency of the rocket isn't greatly decreased. What do you guys think? Feel free to discuss.
 

4KidsOneCamera

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#2
This is a concept I thought of for the reuse of second stage engines (in real life). This probably has been discussed before, but I thought I would share my take on it. The purpose of this is to save the most expensive part of the second stage, the engines. It works as follows.
View attachment 41406
The initial flight stage goes just as it would normally.
View attachment 41407
Then, the engine detaches from the stage. This part is pretty much just the engine, some reaction control systems, a heat shield and some fuel. View attachment 41408
This smaller assembly enters the atmosphere protected by the heat shield.
View attachment 41409
It then deploys its parachutes and lands safely. This is easier than landing the whole stage, and not to mention cheaper. It also wouldn't consume too much fuel or add too much mass, meaning the efficiency of the rocket isn't greatly decreased. What do you guys think? Feel free to discuss.
Very cool looking!
 

Earl

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#4
Thanks guys!
 

Altaïr

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#6
Nice concept :)
That's how ULA plans to reuse the first stage engines on their new Vulcan launcher. They don't plan it for the second stage though.
 

Mars Pathfinder

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#7
Welp in real life situation reusin a second stage is a nightmare to those goin to reuse it.

1.it will add mass
2.gettin it more complex
3.travellin at orbital speed
4.heat shield
5.reducin its payload capacity because its goin to add more things in 2nd stg


Forgot the others....
 

Mars Pathfinder

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#8
Thou that is a nice Build :D :D
 

Blazer Ayanami

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#9
I've seen this concept on a KSP video. You guys think it could be implemented in real life?
 

SFSAbhishek

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#11
I've seen this concept on a KSP video. You guys think it could be implemented in real life?
Earlier I thought that SpaceX would implement it, but I think right now they are focusing on Starship and Starlink