/sci/ - Science & Math

>>10651632
sexy

>>10651604
>hydrogen on a reusable vehicle

>>10651604
Skylon is the best chance us regular people have of getting into orbit.
>>10652232
So? Not everything becomes embittled by hydrogen. We have hydrogen fuel cell vehicles and we don't throw them away after we drive somewhere

>>10651604

Leave spaceflight to me.

>>10652696
Suborbital.

>>10652709

Pray, has this "Skylon" been above 50 mi?

>>10652696
Needs more thrusters

>>10652734
Have you?

>>10652842

>loses the argument

>Europe
>50kg LEO payload
>shuttle heat tiles
>probably a billion dollars per launch

is there anything likeable about this thing other than the way it looks?

>>10652860
>shuttle heat tiles
Lightweight ceramic skin actually

>>10652696
Let me just flip this switch real quick.

SSTOs don't make neither technical nor economic sense anyway.

>>10652232
>jet fuel on a reusable vehicle.

>>10652734
the engine works but they haven't attached it to anything.

>>10652860
scram jet that can get itself to mach 5 or whatever the speed required for a scram.

>>10653826
No it doesn't, precooler works but they haven't built an engine to use it with yet.

this is idea is 100% bullshit, like 100% it will never work, never ever, its 100% fantasy.

The precooler is good, the engine would be very good and it could be very useful for atmospheric flight, but not for space.

This is part of a current marketing strategy called overyhype. Need 10?, ask for 20.000, say youre worth 20.000.000 witjh luck youll get 5

>>10654083
>20.000
>20.000.000

I'll never understand the swapped usage of '.' and ','
Using a comma to denote a fractional amount doesn't make as much intuitive sense as using a period, because a period implies a stop. A comma makes perfect sense to use to break up a large number into smaller sections, as each comma separates the number with pauses making it easier to read.

Everyone uses a period to stop a sentence and a comma to denote a pause in a sentence, why doesn't everyone use these symbols exactly the same for numbers? baka

I do agree that skylon is a shitty meme with meme economics and meme technology that would never work in real life, though. The absolute best niche for the Saber engine would be as propulsion for a hypersonic commercial aircraft with a body shaped as to minimize or ideally eliminate the sonic booms heard at ground level.

>>10654121
>hypersonic commercial aircraft
i think you mispelled military, as always military application is always first. Imagine the ability to have a fighter jet that goes at mach 20 in atmosphere

>>10654198
I'm just fast forwarding to the height of what the technology can be used for. Obviously military is going to pick it up and use it for 40 years before commercial goes anywhere near it. First commercial needs to adopt silent-supersonic body shape technology and get cheap supersonic flight viable, using regular old turbojets. Only once the world has gotten used to 12 hour antipodal flights will they start crying for 6 hour antipodal flights, which would necessitate saber-like engine technology.

>>10654208
nopey nope, masterrace spacex e2e starship will give you 30 minutes from new york to china. Too bad you cant read into technology

Umm,

No sweeties...

https://www.youtube.com/watch?v=Sfc2Jg1gkKA

>>10654232
Uh huh, and as I said, I was talking about the MAXIMUM you could take SABER ENGINE technology. Not considering other factors like SpaceX leapfrogging everyone and offering half hour to anywhere flights. I'm not going to go into a giant ass prediction about the trends of transportation tech for the next 100 years.

>>10652696
most deaths out of any private space program

Lel this thing is supposed to re enter? Look at all that flimsy shit it's going to rip itself apart. Also paper rocket kek.

>>10655333
Space shuttle was able to survive reentry and there are some interesting developments happening in hypersonics.

>>10655131

For no other reason than that they have actually done shit with humans, while the others haven't. Once the other private groups start doing stuff with humans regularly, they'll have their own deaths*

*unless one counts the Dragon capsules, as they dock with a human habitation environment. This is a fair point, but I t hink you know what I mean-a human being, being in the plane/tin can as it's lit/comes down.

>>10655595
Please, compare the design of this shit to the shuttle and it's night and day how flimsy this retarded design is.

>>10654238
>Everyday Estronaut

>>10654121
>I'll never understand the swapped usage of '.' and ','

It is common in most of the world. Period implies the end of a sentence, but a number does not end at decimal separator.

>>10656097
He is a fag but SSTOs are still shit.

Listen.

>Two spaceplanes nearly-SSTO capable, two specialized runways, and air refueling operations.

The runway is essentially a railroad catapult designed to prevent the spaceplanes from needing excessively reinforced and heavy landing gear capable of sustaining their fully fueled weight.

Large fuel transport airplane, 747 for example, carrying fuel.

Spaceplane 1 takes off the runway and targets the 747 for refueling.
Spaceplane 2 takes off soon thereafter from the same runway and begins accelerating toward defined sub-orbital trajectory.

Spaceplane 1 finishes topping up fuel and accelerates to similar sub orbital trajectory to spaceplane 2 with the intent to rendezvous.

During sub-orbital free fall, Spaceplane1 transfers all its fuel to Spaceplane2.
Spaceplane1 follows its sub-orbital trajectory and lands on a runway.
Spaceplane2 proceeds to boost itself to orbit.

Spaceplane1 is then either partially refueled on the normal runway and "hops" from runway to runway until it returns home, or is shipped in some other way.

Spaceplane2 on the other side directly reenters and lands home after successfully deploying its payload.

By utilizing cheap and simple aerial refueling operations, it is possible to use a much more capable and simpler near-ssto spaceplane design. Ultimately SSTO imposes extreme mass fraction limitations which can be completely circumvented using this method. At virtually any point in flight the spaceplanes are fully capable of aborting to normal runways and returning home assuming no damage was found. This is much safer, cost effective, and more efficient way to send things into orbit than conventional rockets.

>Bump for SABRE

SABRE
y i r o n
n re c g
e a k i
r t e n
g h t e
e i
t n
i g
c

Bump for SABRE:

Synergetic
Air
Breathing
Rocket
Engine

>>10656219
Congratulations you just invented a three stage to orbit SSTO. Well done

>>10654198
>mach 5+ in atmosphere
*melts*

>>10656259
>So
>Actually
>Become
>Real
>Eventually

SABER is the definition of a meme.

>>10655757
and what makes it flimsy? Chan you show your calculations that the aerodynamic forces are such that they will tear it apart? You seem like you are an expert in hypersonic aerodynamics so please tell us all.

>>10656752
Ceramics and ceramic composites can withstand the temperature.

>>10656873
*melts*

>>10656885
it ain't melting kiddo. You won't believe just how hot we can go:
https://en.wikipedia.org/wiki/Ultra-high-temperature_ceramics
In case you didn't already know, there's a hypersonic arms race on.

>>10656901
>unironically believing in pop-sci garbage magic materials that promise circumventing reality and physics

protip:
>*melts*

>>10656917
>>circumventing reality and physics
and pray tell which laws of physics are being circumvented here?

space fighters when?

>>10657145
Who /F302/ here?

>>10658024
>>10657145
never. Fighters in space don't make any sense

>>10656219
>Eliminate the need for reinforced landing gear
>It needs to be reinforced to be catapulted