User Everyday Astronaut

33

votes

3

answers

45k

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How to programmatically calculate orbital elements using position/velocity vectors?

Aug 26 at 5:57 phil Mad 1

19

votes

2

answers

12k

views

Is the overall mortality rate for being in a spacecraft in space or bound for space about 4%?

spacecraft safety

Apr 25 '16 at 19:47 Community♦ 1

14

votes

1

answer

1k

views

Why aren't expander cycle engines used on lower stages?

engines engine-design

Feb 3 '20 at 20:11 Pizzacoca 1

13

votes

1

answer

1k

views

Why does the Starship methane header tank have so many holes in it?

spacex spacex-starship tanks

Feb 17 at 7:22 Slarty 3,457

12

votes

2

answers

555

views

What does this SpaceX tweeted photo show and what causes the pure red and blue color?

spacex falcon-9 reentry identify-this-object

May 25 '19 at 18:31 Organic Marble 138k

12

votes

3

answers

4k

views

Would there be any benefit to sending a probe to a black hole?

probe black-hole

Jul 5 '17 at 17:11 Sarah Bailey 2,780

10

votes

1

answer

3k

views

What is and what isn't ullage in rocket science?

terminology ullage

Sep 12 '19 at 17:17 Russell Borogove 147k

10

votes

1

answer

627

views

Does a high staging number have diminishing returns? Is there a way to address that mathematically?

stages rocket-equation design-alternative

May 1 '20 at 18:56 Peter Martyn 23

8

votes

1

answer

231

views

Is there any combustion chamber and nozzle cooled with liquid oxygen instead of fuel?

engines cooling

Mar 25 '19 at 11:07 Everyday Astronaut 5,163

8

votes

1

answer

2k

views

What is the velocity distribution of the exhaust for a typical rocket engine?

exhaust velocity

May 16 '19 at 6:01 Community♦ 1

8

votes

0

answers

272

views

What is the heaviest part of a rocket engine?

engines

Jan 31 '20 at 1:01 irakliy 525

7

votes

4

answers

285

views

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?

launch gravity oberth-maneuver drag

Dec 21 at 11:14 cmaster - reinstate monica 204

7

votes

1

answer

1k

views

Does the entirety of the efficiency of an aerospike engine occur in the lower atmosphere, or are the advantages in a vacuum as well?

rockets propulsion aerospike

Feb 26 '18 at 23:48 Community♦ 1

6

votes

0

answers

1k

views

Potential improvement to BFR or New Glenn if equipped with aerospike exhaust on their engines?

spacex rockets propulsion blue-origin aerospike

Dec 7 '18 at 9:03 user28359 1

6

votes

2

answers

1k

views

Could a satellite in LEO “pump” or change mass distribution to gain forward momentum?

orbital-mechanics artificial-satellite physics

Nov 27 '19 at 11:43 Gabe2k2 1

6

votes

1

answer

404

views

Why did Orbex choose propane as its fuel?

fuel booster insulation

Sep 20 '19 at 21:01 Russell Borogove 147k

5

votes

1

answer

287

views

What are some of the important parameters to scaling a liquid rocket engine

engines engine-design

Aug 29 '19 at 18:28 Level River St 2,445

5

votes

1

answer

245

views

Launch vehicle trajectory tool for ascent phase to orbit using PYTHON

orbital-mechanics trajectory launch-vehicle astrodynamics trajectory-design

Aug 31 at 2:37 ChrisR 4,786

4

votes

1

answer

435

views

In turbopump designs where no propellant is dumped overboard what causes efficiency loss in engines?

engine-design

Sep 9 '16 at 11:43 Uwe 1,634

4

votes

1

answer

524

views

Books on rocket engine dynamics? [closed]

propulsion advanced-propulsion simulation

Sep 5 '15 at 2:19 Organic Marble 138k

4

votes

0

answers

80

views

Cooling an aerospike spike via “fuel diversion”?

engines fuel design-alternative cooling aerospike

Apr 28 '20 at 23:01 YuccaWorks 653

4

votes

1

answer

108

views

What criteria influence launcher aspect ratio?

design launch-vehicle

May 13 '20 at 20:15 Russell Borogove 147k

3

votes

0

answers

49

views

Second derivative of mean motion as indicator of deorbit

orbital-mechanics orbit two-line-elements deorbit

May 13 '20 at 16:45 Craeft 408

3

votes

1

answer

98

views

At which pressure does a liquid fueled rocket start producing supersonic flow?

liquid-fuel nozzle

Sep 11 at 1:51 Community♦ 1

2

votes

2

answers

137

views

Trying to make a program to calculate (liquid) engine size. Can you please help me check for any problems?

rockets engines engine-design amateur-rocketry

Oct 26 at 13:12 StarshipGood 185

2

votes

1

answer

111

views

Why shouldn't we illustrate spacecraft trajectories on top of static pseudo-potential surfaces?

orbital-mechanics simulation halo-orbit three-body lissajous-orbit

Dec 8 at 11:35 SE - stop firing the good guys 29.3k

2

votes

2

answers

124

views

Is there a basic 2 or 3 body space simulator

orbital-mechanics simulator

Jul 1 at 11:42 Carl Witthoft 1,756

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How to programmatically calculate orbital elements using position/velocity vectors?

Is the overall mortality rate for being in a spacecraft in space or bound for space about 4%?

Why aren't expander cycle engines used on lower stages?

Why does the Starship methane header tank have so many holes in it?

What does this SpaceX tweeted photo show and what causes the pure red and blue color?

Would there be any benefit to sending a probe to a black hole?

What is and what isn't ullage in rocket science?

Does a high staging number have diminishing returns? Is there a way to address that mathematically?

Is there any combustion chamber and nozzle cooled with liquid oxygen instead of fuel?

What is the velocity distribution of the exhaust for a typical rocket engine?

What is the heaviest part of a rocket engine?

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?

Does the entirety of the efficiency of an aerospike engine occur in the lower atmosphere, or are the advantages in a vacuum as well?

Potential improvement to BFR or New Glenn if equipped with aerospike exhaust on their engines?

Could a satellite in LEO “pump” or change mass distribution to gain forward momentum?

Why did Orbex choose propane as its fuel?

What are some of the important parameters to scaling a liquid rocket engine

Launch vehicle trajectory tool for ascent phase to orbit using PYTHON

In turbopump designs where no propellant is dumped overboard what causes efficiency loss in engines?

Books on rocket engine dynamics? [closed]

Cooling an aerospike spike via “fuel diversion”?

What criteria influence launcher aspect ratio?

Second derivative of mean motion as indicator of deorbit

At which pressure does a liquid fueled rocket start producing supersonic flow?

Trying to make a program to calculate (liquid) engine size. Can you please help me check for any problems?

Why shouldn't we illustrate spacecraft trajectories on top of static pseudo-potential surfaces?

Is there a basic 2 or 3 body space simulator