Skylon

SpaceX Discussion Thread

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2 hours ago, Nightside said:

Yeah that’s the one. Hard to say how close the guy is to the Raptor, he is probably not right underneath it.

True, it looks like he's really, really close, perhaps touching it, but maybe he's a few m away.

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24 minutes ago, Xd the great said:

Wonder how that will look.

Like building a grain silo? :cool:

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39 minutes ago, Xd the great said:

Wonder how that will look.

Maybe only the core engines at first? It's a grasshopper-esque rocket too, right? And then they could have placeholder engines to simulate the rest of the weight.

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56 minutes ago, tater said:

True, it looks like he's really, really close, perhaps touching it, but maybe he's a few m away.

Look at the dude on the right in this one.

BRhIfBb.jpg

 

Edited by SuperFastJellyfish
fixed the link
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36 minutes ago, SuperFastJellyfish said:

Look at the dude on the right in this one.

Didn't even notice him. Much better.

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2 hours ago, SuperFastJellyfish said:

Look at the dude on the right in this one.

Spoiler

Carbon, soot

ft2199n7dm_00014.jpg

 

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5 hours ago, Spaceception said:

Maybe only the core engines at first? It's a grasshopper-esque rocket too, right? And then they could have placeholder engines to simulate the rest of the weight.

Falcon 9 block 6:

Literally a superheavy hopper.

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13 hours ago, Xd the great said:

Will carbon soot get stuck in the pores of the heat shield?

No, don't think so. A Methane-Oxygen combustion reaction produces only Carbon Dioxide and Water, no pure Carbon, unlike Kerosene/RP-1

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6 minutes ago, NSEP said:

No, don't think so. A Methane-Oxygen combustion reaction produces only Carbon Dioxide and Water, no pure Carbon, unlike Kerosene/RP-1

I think @Xd the great was talking about pyrolysis, not oxidation. 

Also, methane-oxygen reaction only produces CO2 and H2O if it’s complete, which isn’t always the case.

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4 hours ago, NSEP said:

No, don't think so. A Methane-Oxygen combustion reaction produces only Carbon Dioxide and Water, no pure Carbon, unlike Kerosene/RP-1

You also get carbon monoxide at the very least, and there's quite possibly still some coking to solid carbon.

To get pure CO2 exhaust, you need excess oxygen, and probably also relatively low flame temperatures (as high temperatures favor more mixed combustion products).

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Elon’s plane just landed in Waco. Looks like they’re gonna fire Raptor soon.

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15 minutes ago, tater said:

Elon’s plane just landed in Waco. Looks like they’re gonna fire Raptor soon.

Waco and fire don’t exactly have the best history together... <_<

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23 minutes ago, tater said:

Elon’s plane just landed in Waco. Looks like they’re gonna fire Raptor soon.

I wonder what the burn duration will be. And I hope he or SpaceX shares it.

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2 hours ago, Spaceception said:

I wonder what the burn duration will be. And I hope he or SpaceX shares it.

FODT81IJ2MANFHZ.LARGE.jpg

 

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57 minutes ago, Xd the great said:

Kaboom incoming.

no kabooms pls

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40 minutes ago, sh1pman said:

no kabooms pls

Yes, a nice long "FWWWOOOOOOOOSSSSSSSHHHHHHH!!!!" is much more preferable.

Though... let's be honest here - we are wondering about the same thing right now: Does it smell like a fart, or not? :sticktongue:

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2 minutes ago, Scotius said:

Though... let's be honest here - we are wondering about the same thing right now: Does it smell like a fart, or not? :sticktongue:

It runs on liquid farts, so I guess it smells like burnt farts :D

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22 minutes ago, sh1pman said:

It runs on liquid farts, so I guess it smells like burnt farts :D

Smelly or not smelly?

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Unless there's a lot of sulphur in the exhaust for some reason, it won't smell like farts, at least.

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5 hours ago, MaverickSawyer said:

If there's a kaboom, would we hear about it?

Yeah, there are people who live nearby who post stuff that happens at McGreggor.

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21 hours ago, NSEP said:

No, don't think so. A Methane-Oxygen combustion reaction produces only Carbon Dioxide and Water, no pure Carbon, unlike Kerosene/RP-1

At low temperatures and with a stoichiometric fuel/oxidizer ratio, mostly yes. At the kinds of temperatures and pressures Raptor will be running at, and with the fuel-rich fuel/oxidizer ratio it uses, you'll have some CO2 and H20 in the exhaust, but you'll also have some OH, CO, H2, O2, C, H, and O (and yes, some of those species are free radicals). High-temperature, high-pressure combustion is a messy process.

Edited by IncongruousGoat
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