Linked Questions

18
votes
3answers
3k views

Why is Falcon 9's shape so tall and skinny?

Compared to most rockets I know of, Space X's Falcon 9 seems unusually tall and skinny. The v1.1 version is nearly 70m tall, yet only 3.6m thick. For comparison, Atlas V is 58m tall and 3.8m thick, ...
13
votes
1answer
2k views

Why does the CRS-8 Falcon 9 rocket appear to be swaying before launch?

I just saw the video from the YouTube channel SpaceX Edits titled SpaceX B1021: The First Rocket to Fly Twice (a supercut of highlights mentioned in the Pod Bay, and noticed the Falcon 9 for the CRS-8 ...
4
votes
4answers
541 views

Is a Falcon Semi-Heavy plausible?

Some rockets use strap-on boosters to match the payload requirements, even sometimes launching with only one strap on. Is this a plausible scenario for Falcon to be strapped together with only one ...
5
votes
3answers
592 views

Why are these Falcon 9 1st stage bodies (apparently) wrapped in black plastic for transport?

The Teslarati article SpaceX’s third Block 5 rocket heads to Texas test site as launch marathon nears includes the image and caption below. Is this an unused rocket body being transported for launch, ...
8
votes
1answer
740 views

Just how much can tall skinny rockets bend? (roughly, safely)

Below is a GIF I prepared and used in an earlier question, and the answer seems quite reasonable. With a height to diameter ratio of about 70 m to 3.7 m (nearly 20:1) a weight-conscious design, ...
7
votes
1answer
268 views

Falcon 9 fairings stability on reentry

On the descent of the fairings into the atmosphere how is stability provided? Why does it not start to rotate in a uncontrollable fall but reenter gently without apparently damage on the interior ...
2
votes
1answer
711 views

Why spray LOx into combustion chamber, if GOx is more effective?

Are there any issues in transforming the liquid oxygen into gaseous oxygen before injecting into the combustion chamber? Gaseous Oxygen will be readily available for combustion and will mix well with ...
8
votes
1answer
324 views

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

From videos of both the SES-10 launch shown in @RusselBorogrove's question, Cause of apparent plume deflection on SES-10?" and the Block 5 launch Bangabandhu Satellite-1 Mission at ...
3
votes
1answer
203 views

How Do You Build a Rocket?

The curious 6 year-old sitting next to me asks "how do you build a rocket?" What kind of rocket? "A big rocket that flies". (He came by when I was answering a question and he was very excited when I ...
2
votes
1answer
653 views

What determines rocket height/width?

I was wondering what determines the height/width ratio of a rocket? What are factors that influence the choice between a tall skinny rocket like Falcon 9 or a wider shorter (in ratio) like Ariane 5 or ...
4
votes
1answer
214 views

How are SRBs and solid rocket motors transported safely? Do they ever end up on trucks driven down public highways?

The BBC News article The Rocket Scientists Mixing Up a Giant Firework begins with: In a remote corner of tropical South American jungle, French scientists are mixing a ‘cake’ with a difference – a ...
0
votes
0answers
48 views

What are the primary or typical expected failure modes if Q-alpha is exceeded?

I never heard of this before seeing What was the actual Q-alpha limit for Saturn/Apollo launches, and what was the typical max Q-alpha? which refers back to this answer to What does “angle of attack ...