Linked Questions

23
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 ...
5
votes
2answers
601 views

What properties define a good solid propellant for a hybrid engine? (e.g. why not use wood?)

This comment got me thinking... Pure oxygen from a tank of LOX can allow a wide variety of materials to be used as a convenient if not always optimal rocket propellant; things like parafin and sugar ...
6
votes
1answer
742 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 ...
4
votes
3answers
1k views

Why doesn't carbon fiber overwrapping in LOX catch fire? (watch this video first)

Sir Martyn Poliakoff, also CBE FRS and his team produce a fascinating series of Periodic Videos. In this one they team up with Smarter Every Day's Destin Sandlin to do high speed video of a piece of ...
6
votes
1answer
965 views

Surface of Venus - what would it look like to see a spacecraft crushed by the atmospheric pressure?

Assuming you send two landers to Venus that have an expected "surface life" of, say, 8 hours. The second lander arrives four hours after the first, parks up 100 yards away and trains a video camera ...
10
votes
1answer
413 views

How can firing a Space Shuttle OMS engine below 21 km cause its nozzle to "collapse"?

This answer to Can the space shuttle use OMS engines during landing? says: No and quotes Section 3.7 of the Orbital Maneuvering System Workbook; OMS 21002 October 10, 2006, Final version, USA006500 ...
3
votes
1answer
180 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 ...
0
votes
1answer
268 views

What support equipment is necessary to maintain a falcon 9 booster during transport after recovery?

This file photo shows a Falcon 9 first stage being transported by truck after landing. There is some equipment at the end of the truck, which includes dials, knobs, and an exhaust stack, which ...
5
votes
0answers
310 views

Why is heated Helium used for tank pressurisation in Falcon 1?

Here in Falcon 1 user guide, in table 2-1 in page 8, heated Helium is mentioned as used for tank pressurisation. What will be the temperature of such He and why is heated He used?
1
vote
0answers
129 views

Starship vs submarine hull [duplicate]

Just out of curiosity, which can endure higher internal pressure - submarine hull or starship fuel tank? Any comparative figures in bars? I guess, in vaccum explosion can happen and under the deep sea,...
1
vote
0answers
63 views

Is fuel tank pressure structurally important? [duplicate]

Being super lightweight structures, do rockets depend to some degree on internal pressure of their fuel tanks for structural integrity?