Linked Questions

22
votes
7answers
5k views

Pre-mixing cryogenic fuels and using only one fuel tank

A methalox engine is fed from two cryogenic fuel tanks. Why can't the methane and oxygen be mixed as gases, in the desired proportions, and then chilled to a temp that liquefies both? From a single ...
53
votes
4answers
15k views

“Pillars of Baikonur” What is the purpose of the hundreds of short, white posts near the Baikonur Cosmodrome launch pad?

The caption given in the third image included in the Space.com page Expedition 56: The Space Station Mission in Photos reads as follows: At the Baikonur Cosmodrome launch pad, remote-controlled ...
21
votes
3answers
5k views

Why is the Falcon Heavy center core recovery done at sea?

Why does SpaceX attempt sea recoveries of the Falcon Heavy center core instead of staying at altitude and performing a land based recovery at a different site?
8
votes
3answers
2k views

How vulnerable could space launch vehicles be to a “lone gunman”?

As the saying goes - space is hard. Rockets are a collection of extremes in temperature, pressure, and energy packed as closely as possible and driven to their limits. Even in 2016 they still ...
14
votes
2answers
748 views

How does SpaceX plan to deal with possible methane buildup around Starship?

Starship is going to be fueled with cryogenic liquid methane. Before launch, the vehicle will spend some time fully loaded on the launchpad. Although methane is lighter than air at normal temperature, ...
6
votes
1answer
730 views

Is this explanation for the SpaceX 1-Sept-2016 anomaly plausible?

Question: Is this explanation for the SpaceX 1-Sept-2016 anomaly plausible? Or most of it at least (sans LHe)? In the recent New Atlas article SpaceX fingers helium as cause of Falcon 9 rocket ...
8
votes
2answers
767 views

Why was OSIRIS-REx almost destroyed because of a loss of pressure following the SpaceX “fast fire”?

In the news item on the website of ABC's affiliate station WFTV in Florida Official: SpaceX explosion nearly destroyed asteroid-seeking OSIRIS-REx spacecraft, there is discussion of a loss of pressure ...
3
votes
2answers
243 views

Would it be possible to avoid the heat-from-friction problem when re-entering the atmosphere by performing (vertical) “U-turns”?

If you lift a swing at a children's playground and release it will swing back and forth for a while, losing some altitude in each swing, mostly (?) due to drag. Eventually it has lost all energy and ...
3
votes
2answers
306 views

Super Heavy explosion, how much TNT equivalent would that be?

If the Super Heavy booster explodes, fully loaded, how strong would the blast yield be? How far would the shock wave reach? How does this compare to the N1 RUD's and to other non-nuclear explosions? ...
2
votes
1answer
269 views

explosive force equivalent

i've seen 1 link that would direct me to a site that gave an equivalent of what would happen if a SATURN 5 let go on the pad, but not the Shuttle, was wondering what the force equivalent would be if ...
3
votes
1answer
178 views

How to judge the compatibility and veracity of Scott Manley's explanations for the SpaceX AMOS-6 anomaly?

I was recently caught off-guard by a proposed explanation for a SpaceX malfunction which seems to have turned out to have been a joke at probably my expense and no-one else's, meaning I completely ...