J-2X Engine Tested at Stennis

[hobanm45]

lol at the angry birds sticker on the guys head set at 4:44

[meegul304]

ahhh my taxpayer dollars

[Chris58851]

Chuck Norris had a refreshing shower

[wiechomt]

down periscope, are the j-2x torpedo!!!

[yaguy98]

They are still using CRT monitors???

[bpeterdude316]

@yaguy98 NASA are on a budget :/

[beckncallnasa]

Just love the hawaiian shirts....very hip....but exactly where is the engine????

[SteverRob]

@beckncallnasa "Hawaiian Shirt Friday"

[slave880]

that is one good cloud maker machine 

[michal1337]

I don't see how it works. Where is this engine? All I can see is steam

[GDop26]

And that's where clouds come from.

[BlackRonin2917]

That's not white smoke. That's water vapor.

[cruxader27]

what's with the white smoke anyway? what kind of fuel are they using? i see many Russian rockets launched without that white smoke.

[emactan]

This is the coolest "steam engine" ! :)

[MichaelMitchellM]

Hmm, I cloud generating rocket engine... Me like :)

[emerald1one1]

one looping earth , with same fuel , with problem , no wonder  there is a periscope area .

[garreth123]

What can we see on 4:00 ?

[kola198585]

sorry ppl but its the first time i see something like this , can any one explain to me ?



[fktrcfylh32]

При температуре выхлопа ракетного двигателя результатом его работы никак не может быть чистый водяной пар, даже если пламя будет направлено в резервуар с водой. Окислы азота--вот наиболее вероятные вредные компоненты выхлопа. А в смеси с Н2О--получится HNO2 и HNO3.

[wlmason73]

@fktrcfylh32 Well, I guess it could be considering "pure" water if the concentrations of Nitric/Nitrous acid aren't significant.

[JoeFervor]

Darth Vader: Most Impressive.

[ho2sorellestupide]

So that's where babies come from...

[zaneacademy]

no flying test?

[menschenopfer]

impressive.

[ahsanieee]

what is it emitting???

[m0n3yman13]

@ahsanieee Water vapor as hydrogen and oxygen molecules combine to release enormous amounts of energy.

[ThatAdelaideGuy]

@ahsanieee Steam. It's the sound suppression system being turned to steam from the rocket exhaust

[fbaube]

Why the hell does the camera cut away right before shutdown? Who directed this video? Argh!

[kenhes]

The need to name this engine something cool....like "Mist Maker".

[GrayFox2k8]

so when you going to start testing nuclear pulse propulsion?

[hackneysaregreat]

The NASA way of dry-cleaning...

Great video, great engine.

[abdhoms]

Now I can see who pollutes atmosphere :D

[coisinhodasilva]

@abdhoms the output is pure water (H2O)

thats not polluting

[djsmore]

Sorry to troll, BUT, That shirt @ 8:43 is louder than the engine test!! 

[Reoh0z]

I would rather see stuff like this on the news, than whichever freaky alien-lookalike plastic celeb's are hookin' up.

[rob864guy]

what they are doing is spraying water into the output of the engine to cool it off for the rest of the engine testing facility. It's a fairly powerful, efficient upper stage rocket engine. In my opinion they did good. This is what will be allowing us to go deeper into space with more equipment.

[FloridianGuy]

Like this comment if you already seen this on Top Gear :P

[kiettyyyy]

@FloridianGuy The video that was on Top Gear was a Space Shuttle rocket booster engine static test...

[FloridianGuy]

@kiettyyyy - Jeez, get a life man, same result.

[1301202008090119]

8:13 Why are they all wearing those eerie aloha shirts? I was sure they died ten years ago. Is this some rocket science cult?

[nativeamericanflutes]

@1301202008090119 There is nothing eerie about aloha shirts, they have never gone out of style as they arent a style to begin with. they have been around many many years. folks in the warmer south tend to wear them especially in fields such as aeronautics and jet propulsion..

[1301202008090119]

@nativeamericanflutes I'm not sure if you want to make me joke or are dead-serious. ;-S Thanks anyway!

[illustriouschin]

They should build a rocket that runs on weed.

[cinamin45]

@illustriouschin yes cuz THC Is verry combustible 

[sixpackgenius]

Very cool indeed! Congrats to the engineers that took the J-2 and made it better!

[adcjj]

So...the so-called "pacing" item for Ares I will be now throttled back so the development of the SLS can catch up....to bad Ares was cancelled.

[Boehoehuahoei]

No global warming fanatics have watched this video yet!!

KEEP THEM AWAY FROM THE AWESOMENESS!!!

[SigEpBlue]

@Boehoehuahoei Um...what? The only output from this is heat and water.

[blitsed]

@SigEpBlue SLS is gonna be Al Gore's Rocket...ONLY CLEAN ENERGY MAN! The rocket itself will be made of recycled bottles & paper.

...isn't it?

Aw, sorry, I was impressed too by the huge amount of steam produced and the absence of flames, but I suppose it's just because they tested on water...

[rob864guy]

@blitsed

Believe me, this thing produces flames. It's just they are spraying water at high pressure into the output of the engine to reduce any damages these flames would produce.

[Ultrahest]

@SigEpBlue So in which way is that heat being produced?

[SigEpBlue]

@Ultrahest By the following equation: 2 H2(g) + O2(g) → 2 H2O(l) + 572 kJ (286 kJ/mol), also known as combustion. The products, on the right-hand-side, are heat (572kJ worth!) and water (good ol' H2O). :)

[IslandHermit]

@SigEpBlue More to the point, the exhaust is being quenched with massive amounts of water before being vented from the test rig. Even if the engine was burning kerosene you'd still see that massive cloud of steam.

[SigEpBlue]

@IslandHermit Hmm...so the exhaust is quenched with an external water source, in addition to the water produced by the rocket's combustion output? Interesting if true; I do recall a water tower was used for this purpose at the STS launchpads, however that system was utilizing *solid* rocket boosters, whereas this J-2X is using only liquid hydrogen and oxygen.

[FadesEntertainment]

@Boehoehuahoei durp

[DaveWW00]

So the guys running the test are in a bunker watching on monitors and a periscope yet they let people stand outside and watch it from?

[ahg337]

@DaveWW00 They can't bring all their computers outside...

[tbailey846]

@DaveWW00 They use the monitors & periscopes to see how the engine is performing, not just to watch the smoke & steam. The reporters and observers were plenty far away, even if it doesn't look like it on the video. That test stand is BIG. They are not just standing next to it.

[Darksidethreefour]

@DaveWW00 I imagine (hope, more or less) that the people in the bunker are much closer than the people outside. But yeah, that's what I was thinking as well.

[sirachman]

@DaveWW00 It is sort of difficult to set up 30 computers and other hardware on picnic tables outside. I bet your PC is in your house instead your yard is it not?

Common sense. It is indeed useful.

[AthenaAtDelphi]

@DaveWW00 I think the people in the bunker are the important scientists and engineers needed for the test , while the people outside are sort of 'disposable' .

:-)

[IslandHermit]

@DaveWW00 The periscope is providing the testers with a close-up view of the engine, which is too dangerous to do in person. The people outside watching are sufficiently far away that they are in no danger.

[woolensheep192]

@DaveWW00 i reckon they needed to be near monitoring equipment which probably should be placed near the rocket itself

[SteverRob]

@DaveWW00 Not a bunker. It's ATCC, Test Control Center. You can't see monitors outside.

[OmegaMolecule]

Awesome!!!!!!!

[MirrorMirror00]

Very cool

[EShutilO]

what type of fuel used?

[HNDNV07]

@EShutilO The fuel used is Liquid Hydrogen or LH2. It is a cryogenic propellant meaning supercold.

[6Diego1Diego9]

I cant tell what's going on

[Tommyr]

Yeah BABY! GO GO GO! I LOVE IT! Looks good to me!

[silvereagle2061]

The duration would have placed her in orbit. Fantastic test

[LTF85199]

smoke smoke and smoke

[TOTCD]

This was really impressive!!!!

[captainofiron]

somebody tell the test conductors its not friday, why are they wearing the hawaiian shirts?

[CameraOnaStiick]

@captainofiron It's a Stennis tradition. If they had posted the whole video, one of the managers explains it.

[captainofiron]

@CameraOnaStiick Oh really, thats pretty funny, at my site we wear them on Fridays when a Orbiter was up. Pretty funny.

[CameraOnaStiick]

@captainofiron

It's a Stennis tradition. If they had posted the whole video, one of the test managers explains it.

[rootusercouk]

Wake me when they take the VASIMR for a spin.

[paywalker1]

this is great, this people rock!

[MartianStories]

My god its like a never-ending orgasm. What kind of engine is this, Orgasmatron 9000?

Faved. What a wild ride. When do our ships get them?

[petertbbrett]

@MartianStories It's a J-2X. It's going to be used on the upper stage of the SLS, which is a new NASA rocket that's currently scheduled to launch first in 2017.

[MsMcBell]

Great! Looking forward to hearing more of this project =))

[fcycles]

Can someone say more info about the J-2X rocket engine? It's seem a liquid rocket...? What is the mix used, what pressure it give?

[petertbbrett]

@fcycles It's an LH2/O2 staged-combustion engine that's designed for upper stage use. It has an Isp of around 400, IIRC.

[94kricco]

looking good, I'm so exited about the Space Launch System xD

good luck on with the Orion spacecraft =)