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Erik's user avatar
Erik's user avatar
Erik's user avatar
Erik
  • Member for 10 years, 11 months
  • Last seen more than a month ago
7 votes

Why does Vandenberg have the most launches?

4 votes

Why does it take so long for ISS garbage to fall out of orbit?

14 votes
Accepted

At what travel distances are ion engines faster and more efficient than conventional fuel engines?

5 votes

What were Prince Sultan's duties in STS-51-G?

25 votes

What is the ideal shape for a rocket?

6 votes
Accepted

Why would a significant non-zero angle of attack be an advantage during 1st stage burn?

26 votes
Accepted

How long did it take, at a minimum, to prep a shuttle for launch after it landed?

2 votes

Why does spinning help stabilisation?

0 votes

Why does a spacecraft's attitude become stable when it rotates?

14 votes
Accepted

Is ISP all there is to engine efficiency?

4 votes

Theoretical Asteroid Composition and the economy

12 votes

Lowest ISS microgravity

1 vote

Was the Apollo spacecraft always gravitationally bound to the Earth-Moon system?

2 votes

Engine on a gimbal vs ailerons

41 votes

Did the Space Shuttle have "military uses"?

4 votes
Accepted

How is the minimal $\Delta v$ transfer between non-coplanar orbits calculated?

1 vote

Is the Oberth effect applicable to any speed change, or only to ejection of reaction mass?

10 votes

What CAD system do the ISS designers use?

5 votes

Horizontal space launch

5 votes

Oberth is confusing me. Apparent violation of conservation of energy

4 votes

Can you buy land on the moon?

6 votes

Why do we use the gravitational acceleration at the Earth's surface when calculating the specific impulse of an engine?

5 votes

What does "self-pressurizing" mean in regards to propellant tanks?

1 vote

Is higher delta-V required to enter polar orbit than equatorial orbit around another planet?

2 votes

Blue Origin's The New Shepard crew capsule's design

2 votes
Accepted

Mathematics of Gravity Assists

15 votes

Why was Dragon sent to the isolation room?

5 votes

Why does the New Shepard vehicle not have an exhaust trench?

2 votes

How to calculate the sphere of influence radius of the sun and other stars?

3 votes

Does terminal velocity play a significant role when launching from Earth?