User Everyday Astronaut

33

votes

3

answers

42k

views

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

Aug 26 at 5:57 phil Mad 1

14

votes

1

answer

965

views

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

engines engine-design

Feb 3 at 20:11 Pizzacoca 1

12

votes

2

answers

520

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 119k

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 2,608

10

votes

0

answers

190

views

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

spacex spacex-starship tanks

Sep 11 at 17:02 will 1

10

votes

1

answer

572

views

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

stages rocket-equation design-alternative

May 1 at 18:56 Peter Martyn 23

9

votes

1

answer

2k

views

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

terminology ullage

Sep 12 '19 at 17:17 Russell Borogove 133k

8

votes

1

answer

199

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 4,915

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

200

views

What is the heaviest part of a rocket engine?

engines

Jan 31 at 1:01 irakliy 515

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 at 11:43 Gabe2k2 1

6

votes

1

answer

205

views

Why did Orbex choose propane as its fuel?

fuel booster insulation

Sep 20 '19 at 21:01 Russell Borogove 133k

6

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

5

votes

1

answer

218

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 2,320

5

votes

1

answer

117

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

Aug 19 at 11:20 asdfex 8,595

5

votes

1

answer

150

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 3,623

4

votes

1

answer

398

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 1,596

4

votes

0

answers

73

views

Cooling an aerospike spike via “fuel diversion”?

engines fuel design-alternative cooling aerospike

Apr 28 at 23:01 YuccaWorks 559

4

votes

1

answer

89

views

What criteria influence launcher aspect ratio?

design launch-vehicle

May 13 at 20:15 Russell Borogove 133k

4

votes

1

answer

516

views

Books on rocket engine dynamics? [closed]

propulsion advanced-propulsion simulation

Sep 5 '15 at 2:19 Organic Marble 119k

3

votes

0

answers

41

views

Second derivative of mean motion as indicator of deorbit

orbital-mechanics orbit two-line-elements deorbit

May 13 at 16:45 Craeft 103

3

votes

1

answer

82

views

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

liquid-fuel nozzle

Sep 11 at 1:51 JCRM 6,640

2

votes

2

answers

109

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

Sep 15 at 16:53 Organic Marble 119k

2

votes

2

answers

117

views

Is there a basic 2 or 3 body space simulator

orbital-mechanics simulator

Jul 1 at 11:42 Carl Witthoft 897

Stack Exchange Network

current community

your communities

more stack exchange communities

Next privilege

Next badge

25 Bookmarks

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

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

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?

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

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?

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

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?

What are some of the important parameters to scaling a liquid 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?

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