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Questions tagged [development]

Relating to creating, testing, and refining technology used in space exploration.

9
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1answer
908 views

Why is a purging process necessary for static firing test of liquid rocket engines?

In Chapter 7 of Modern Engineering for Design of Liquid propellant Rocket Engines by Huzel and Huang, mentions the following engine cut off procedure. The cutoff sequence usually consists of ...
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0answers
45 views

What is the geometric dimensions of turbo pumps present in SSME?

Here is a really well documented and detailed explanation of the SSME engine. Looking through this, one can notice that there are no details of the dimensions. I would like to know about the ...
3
votes
1answer
111 views

What is the surrogate liquid for LOx during the preliminary testing of injectors?

Before transitioning to the LOx tests during any new injector development, water is typically used for calculating flow rates, pressure loss, etc. But testing with water cannot qualify as a suitable ...
5
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2answers
213 views

Does stress-testing a spacecraft affect its durability?

When a spacecraft is built and prepared for a future launch, its parts and the whole spacecraft usually goes through a lot of testing - for example, the James Webb telescope has already been through ...
5
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0answers
172 views

Is ISRO Making a Methane Engine?

I'd read some stray comment on the internet claiming that ISRO is working on a methane-LOX engine, just as a technology demonstrator. Is this true?
5
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1answer
428 views

Why aren't superconductors used more in space?

The worst obstacle and the primary roadblock to using superconductors on Earth is the ambient temperature which necessitates a coolant like LN2 or even liquid Helium (and a lot of energy for creating ...
2
votes
1answer
204 views

How can new LEO manned launch vehicle development costs be reduced?

I was looking through the historical record and found that over time the money input into rocket development has yielded more performance benefits. I imagine that the development cost has reduced ...
3
votes
1answer
266 views

Why are the exhaust plumes exiting the nozzles of SpaceShip Two segmented along their length?

Here is a photo of SpaceShip 2's exhaust shortly after ignition during the test flight in January Why do they have that segmented structure, and how does it affect thrust?