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Results tagged with design-alternative
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user 36625
Questions about alternative designs the asker has thought of, such as "why was X built this way and not this way"
2
votes
Why didn’t the N1 use detachable boosters like the Soviet’s did on Soyuz?
http://www.astronautix.com/n/n1.html
Configuration variations considered were:
N1-I - Packet rocket, as used for the R-7. Six strap-ons around an identical core with an upper stage. Two sub-types w …
1
vote
1
answer
269
views
Can a spinning water film cool an engine cheaper and better than ablative?
Ablative cooling us an incredibly simple way to cool a liquid rocket engine, when compared to regenerative cooling. But ablatively cooled engines are (presumably) hard to refurbish.
Why not inject a s …
23
votes
6
answers
5k
views
Why is it not concerning from a cost perspective to have so many engines on Starship?
Starship is meant to imitate (to a degree) the affordability of passenger jets. This applies to Earth-to-Earth travel as well as space travel.
Jetliners started with 4 engines, but have since migrated …
4
votes
1
answer
808
views
SSME/RS-25: why seal between LOX pump and preburner?
Both the the fuel and oxidiser preburners ran fuel rich. In order to prevent the preburner gas from entering the LOX pump and blowing it up, they had this complex double seal with a gas purged void in …
4
votes
3
answers
638
views
Merging Shuttle and External Tank to reduce reentry heating
The Space Shuttle needed a high-performance heat shield that caused much grief over it's operational life. Having a large surface area on a reentering vehicle reduces temperatures by causing the vehic …
1
vote
0
answers
78
views
What if satellites could be recovered during a launch failure? [duplicate]
How heavy would a capsule have to be to return a satellite safely to earth in the event of a launch failure? Would a satellite survive the loads endured by astronauts during an abort? If not, is there …
18
votes
5
answers
5k
views
Exactly why does Starship need to be this big for interplanetary travel?
As discussed in several answers to Isn't Starship way too big? Starship's unusual size is due to it being intended for missions to the Red Planet. But why?
Even a smaller ship could satisfy the delta- …
5
votes
1
answer
435
views
Why wasn't Buran mounted on top of Energia?
Since unlike the Shuttle, the Buran did not carry the main engines, why was it not mounted on top of the external tank equivalent - Energia's core stage?
And even better, why wasn't Energia's second s …