24
votes
Accepted
How close was the ISS to running out of supplies after the failure of CRS-7?
Hobbes' answer to How long can a 2 person crew survive on ISS totally cut from Earth? has links to articles that include NASA press releases from around that time.
In Progress Failure Puts Burden on ...
- 6,716
18
votes
How can you make a rocket quieter?
According to https://www.mdpi.com/2076-3417/12/10/4874, jet noise in aircraft is due to shear “turbulence pulsation formed by the rapid mixing of the high-speed air jet from the nozzle and the ...
- 13.8k
10
votes
Accepted
After SLS, what is the next rocket building project for NASA?
As a general rule, NASA tries to stay out of the launch business and focus on the science business. SLS is a weird holdover partially imposed upon NASA by Congress.
Companies like Rocket Lab, SpaceX, ...
- 16.8k
6
votes
After SLS, what is the next rocket building project for NASA?
Congress mandated SLS for a range of political reasons largely concerning aerospace jobs. SLS is likely to remain in service while these needs remain and NASA is not at liberty to start any new rocket ...
- 7,786
6
votes
Accepted
What happens if the range control fails?
It depends on if at least some engines are on. In the event of a failure where no thrust is being generated (all engines are off), the rocket crashes according to its ballistic trajectory (where ever ...
6
votes
Accepted
Are Falcon Heavy fairings reused?
The evidence points to:
SpaceX recovers Falcon Heavy fairings if they can - the first fairing caught as part of their "dry recovery program" was a Falcon Heavy fairing from the third FH ...
- 268
5
votes
Why did the maiden flight of H3 fail?
It's a bit premature to ask why a launch vehicle failed just a few days after the failure occurred. In this case, the second stage engine apparently failed to ignite. What caused that failure may not ...
- 71.4k
2
votes
Why is Adiabatic wall temperature taken as the driving temperature in rocket engines?
The reason why $T_{aw}$ is used for $T_{ref}$ is simple. your solid temperature at surface can't go over your $T_{aw}$ - that's the maximum that you will observe. In terms of $h$, it's logical since ...
- 21
2
votes
Do full flow rocket engines still use injectors? If so, how? How exactly are the oxidizer and fuel sent into the combustion chamber?
Yes, they still use injectors. They are gas injectors instead of the liquid or mixed phase ones in other engines. The gas injectors serve the same purpose of metering and mixing the propellants that ...
- 171k
1
vote
How can you make a rocket quieter?
The main way to reduce the noise generated would be to reduce the chamber pressure of the rocket engines and/or increase the size of the engine bell.
Sadly both greatly reduce surface level thrust, so ...
- 593
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