User Everyday Astronaut

33

votes

3

answers

47k

views

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

Aug 26 '20 at 5:57 phil Mad 1

19

votes

2

answers

13k

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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 CommunityBot 1

16

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2

answers

2k

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

engines engine-design

Jul 22 at 1:12 First_Dan 21

13

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1

answer

1k

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

spacex spacex-starship tanks

Feb 17 at 7:22 Slarty 4,612

12

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3

answers

4k

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

probe black-hole

Jul 5 '17 at 17:11 Sarah Bailey 2,800

11

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2

answers

598

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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 146k

10

votes

1

answer

656

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

10

votes

1

answer

3k

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

terminology ullage

Sep 12 '19 at 17:17 Russell Borogove 157k

8

votes

1

answer

260

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 5,291

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 CommunityBot 1

8

votes

0

answers

297

views

What is the heaviest part of a rocket engine?

engines

Jan 31 '20 at 1:01 irakliy 565

8

votes

3

answers

400

views

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

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

Sep 3 at 18:56 Roger Wood 1,474

7

votes

5

answers

342

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

Oct 9 at 22:29 wistlo 351

7

votes

1

answer

500

views

Why did Orbex choose propane as its fuel?

fuel booster insulation

Sep 20 '19 at 21:01 Russell Borogove 157k

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 CommunityBot 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

5

votes

1

answer

322

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 2,525

5

votes

1

answer

279

views

Launch vehicle trajectory tool for ascent phase to orbit using PYTHON

orbital-mechanics trajectory launch-vehicle astrodynamics trajectory-design

Aug 31 '20 at 2:37 ChrisR 5,128

4

votes

1

answer

450

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 1,644

4

votes

0

answers

81

views

Cooling an aerospike spike via "fuel diversion"?

engines fuel design-alternative cooling aerospike

Apr 28 '20 at 23:01 YuccaWorks 663

4

votes

1

answer

126

views

What criteria influence launcher aspect ratio?

design launch-vehicle

May 13 '20 at 20:15 Russell Borogove 157k

4

votes

1

answer

531

views

Books on rocket engine dynamics? [closed]

propulsion advanced-propulsion simulation

Sep 5 '15 at 2:19 Organic Marble 146k

3

votes

0

answers

54

views

Second derivative of mean motion as indicator of deorbit

orbital-mechanics orbit two-line-elements deorbit

May 13 '20 at 16:45 Craeft 433

3

votes

1

answer

102

views

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

liquid-fuel nozzle

Sep 11 '20 at 1:51 CommunityBot 1

2

votes

2

answers

139

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 '20 at 13:12 StarshipGood 185

2

votes

2

answers

124

views

Is there a basic 2 or 3 body space simulator

orbital-mechanics simulator

Jul 1 '20 at 11:42 Carl Witthoft 1,891

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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?

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

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

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

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

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?

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

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?

Why did Orbex choose propane as its fuel?

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?

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?

Cooling an aerospike spike via "fuel diversion"?

What criteria influence launcher aspect ratio?

Books on rocket engine dynamics? [closed]

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?

Is there a basic 2 or 3 body space simulator