Everyday Astronaut
  • Member for 4 years, 2 months
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3 answers
34 votes
48k views
38 bookmarks
How to programmatically calculate orbital elements using position/velocity vectors?
2 answers
19 votes
13k views
4 bookmarks
Is the overall mortality rate for being in a spacecraft in space or bound for space about 4%?
2 answers
16 votes
2k views
3 bookmarks
Why aren't expander cycle engines used on lower stages?
1 answers
13 votes
1k views
1 bookmarks
Why does the Starship methane header tank have so many holes in it?
3 answers
12 votes
4k views
3 bookmarks
Would there be any benefit to sending a probe to a black hole?
2 answers
11 votes
645 views
2 bookmarks
What does this SpaceX tweeted photo show and what causes the pure red and blue color?
1 answers
10 votes
670 views
2 bookmarks
Does a high staging number have diminishing returns? Is there a way to address that mathematically?
1 answers
10 votes
3k views
2 bookmarks
What is and what isn't ullage in rocket science?
1 answers
8 votes
272 views
2 bookmarks
Is there any combustion chamber and nozzle cooled with liquid oxygen instead of fuel?
1 answers
8 votes
2k views
1 bookmarks
What is the velocity distribution of the exhaust for a typical rocket engine?
0 answers
8 votes
330 views
1 bookmarks
What is the heaviest part of a rocket engine?
3 answers
8 votes
453 views
1 bookmarks
Why shouldn't we illustrate spacecraft trajectories on top of static zero velocity pseudo-potential surfaces?
5 answers
7 votes
348 views
1 bookmarks
Can Oberth bike? Is biking up and down a series of hills a good real-world analogy for understanding either the Oberth effect and/or gravity drag?
1 answers
7 votes
561 views
1 bookmarks
Why did Orbex choose propane as its fuel?
1 answers
7 votes
1k views
2 bookmarks
Does the entirety of the efficiency of an aerospike engine occur in the lower atmosphere, or are the advantages in a vacuum as well?
0 answers
6 votes
1k views
1 bookmarks
Potential improvement to BFR or New Glenn if equipped with aerospike exhaust on their engines?
2 answers
6 votes
1k views
1 bookmarks
Could a satellite in LEO "pump" or change mass distribution to gain forward momentum?
1 answers
5 votes
352 views
1 bookmarks
What are some of the important parameters to scaling a liquid rocket engine
1 answers
5 votes
298 views
2 bookmarks
Launch vehicle trajectory tool for ascent phase to orbit using PYTHON
1 answers
4 votes
460 views
4 bookmarks
In turbopump designs where no propellant is dumped overboard what causes efficiency loss in engines?
0 answers
4 votes
87 views
1 bookmarks
Cooling an aerospike spike via "fuel diversion"?
1 answers
4 votes
139 views
2 bookmarks
What criteria influence launcher aspect ratio?
1 answers
4 votes
535 views
1 bookmarks
Books on rocket engine *dynamics*?
0 answers
3 votes
59 views
1 bookmarks
Second derivative of mean motion as indicator of deorbit
1 answers
3 votes
103 views
1 bookmarks
At which pressure does a liquid fueled rocket start producing supersonic flow?
2 answers
2 votes
148 views
1 bookmarks
Trying to make a program to calculate (liquid) engine size. Can you please help me check for any problems?
2 answers
2 votes
128 views
1 bookmarks
Is there a basic 2 or 3 body space simulator