SLS Core Stage Hot Fire Test (full duration) 

It's an incredible rocket engine design, that's for sure.

These included the older rs-25s from the first shuttle

but the sad fact is, it’s for a single use only witch is huge waste of money and inventory

Never heard FOUR together before though. Awesome.

That is over 10 million horsepower.

Definitely cool

I'm still in awe of the Saturn Vs. Seeing them in 4k in the movie Apollo 11 was incredible.

@@fmbbeachbum8163 these four engines generated 1.6 million pounds of thrust. No small feat, however, the Saturn 5's five F1 engines developed 7.5 million pounds of thrust. Staggering !!!

Yeah, this is 1/7 of a Saturn V array of five F-1's!

@@thejerseyj5479 each F1 engine produced 1.5-1.6 million pounds of thrust. All 5 in Saturn 5 launches produced 7.5 million pounds of thrust.

I'd like to SEE an Alcubierre Drive ripping SPACE a new one.🤔

Here you go! Stennis Space Center Virtual Tour. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-tP7bNZt0QBU.htmlsi=sb_5udol7M9AfYX9

It's just really heavy. Think of a concrete base that is millions of pounds heavy.

Lots of steel and concrete

I believe you can see the beams flexing when all four engines are gimballing around.

oh yes my favorite engine :D purely for the exhaust

@@gen2mediainc.577 those beautiful shock diamonds

To me they seem to run in such a smooth and controlled maner.. effortless somehow and the clean exhaust.. seeing them run again brings joy and admiration, a very special engine just as the vehicle it used to power. It's quite sad and unfortunate that four will be lost at the end of each launch.. PS: how about "reactivating" a Shuttle and the 747 carrier plane and droping it (early Enterprise test style) for a demonstration landing at airshows once or twice a year? The Brits kept some of their iconic stuff in almost flying condition for airshows like the very cool Vulkan bomber :D

Senate Launch System is a pointless outdated rocket. SpaceX Starship will blow the Senate Launch System out of the water. POINTLESS ROCKET!!!! GO SPACEX!!!

Any plumbing that comes before the combustion chamber needs to be at a higher pressure then the combustion chamber, to prevent gases from flowing back into the engine.

Can they use this method to bring rain to drought stricken areas?

@@aaaeee2862 maybe but it would cost a lot.

@@northtexasskies7786 👍

@@neodiniankatanaflake9666 Isn’t rocket fuel environmentally safe? They use hydrogen and oxygen, which turns to water.

You can see rain falling from the clouds of those engines… unbelievable release of energy!

This thing will launch August 29 to the moon!

August 29 was scrubbed. New date is Saturday September 3, 2022 at 14:17 EDT.

You sir are a traitor to the SpaceX company... Shame on you, think about poor Elon!

@@LesFelts second scrub

😁 soon?

Or when the head engineer’s wife ask much more steam for her iron 😄

Being a plumber I would love to build the pump system for that. Ohh well there's always a chance to get to work there.

Just don't get too close because the sound energy coming from those engines would rip a person to shreds ! ! ! 👍👍👍👍👍👍

@@andrewhillis2269 une telle puissance

"Place him where he can be assured of warmth."

@@andrewhillis2269 r

That's what she said. 😉

I read at the start of the video that the propellant is liquid hydrogen & liquid oxygen. Is the cloud just water vapor? Sorry if it's a stupid question, I definitely ain't no rocket scientist…

@@LSD123. The cloud like is water vapor but not really from the engines, in the beginning there is a lot of water flowing out and as the engine fires up, it vaporize the water into steam, the water keep flowing to during the burn there is always steam coming out as the exhaust from the engine vaporize them, and yes the engine do generate water vapor but you can't see them. Also the water is used to keep the structure intact as the sound from the engine can destroy it.

@@LSD123. Steam mostly.

people should use a set of RS-25 to vape instead

@@fork9001 LOL

Yea, maybe we'll see something in 20 years or so.

Yea!!!! Am excited too! But ngl, SpaceX would have already put a starship on mars by then

@@forgeskygaming3355 20 years and SpaceX will have hotels and gas stations on the Moon and Mars for NASA to visit.

@@TheJimtanker I mean nasa ain't that bad also remember that spacex would have been nothing without NASA

@@forgeskygaming3355 What did NASA do for SpaceX?

Haha! Great comment.

Since the rocket exhaust hits the ground and pushes it as well, most thrust of that burn is being cancelled out. The deflection to one side would generate the largest thrust vector, but compared to the mass of the earth that's not even a pinprick.

You having a wet dream. Hahahahaha

Aerojet Rocketdyne and Boeing collaboration.*** NASA gets too much credit for writing a check.

@@MDE_never_dies You do when you get flooded out and then they have the nerve to shout "Climate Change"

Ssssh don’t let the SpaceX fanboys hear you

@@GumballAstronaut7206 They are in denial that the RS-25s have performed magnificently while Space X is still attempting to get the Raptors stable.

@@pebmets Not only that, the only reason why the raptors are even able have the power to lift the Starship Super Heavy, is in numbers....the Saturn V, SLS, and even the Space Shuttle engines used nothing but raw power.

@@καλαμ People keep criticizing the RS-25s because they have been around a long time. These are not the same engines from 1981. They have been upgraded and enhanced since them. This is why they run at 109%. Since there initial specs, they have been improved to get that much more performance. They have flown 405 times with only one failure and that mission was still able to continue. Yes raptors are relatively new, but new does not equal better. Liquid Hydrogen is a very efficient, (and cleaner), fuel but very difficult to store. It would be very difficult to use hydrogen on long space flights because of the need to keep it very cold to keep it from venting. Are raptors better engines? We really won't know until SpaceX gets them stable. As of now, The RS-25s is a more stable and efficient engine. Over time, this could change, but not as of today.

Was Saturn V more powerful? I would have thought this would be more powerful for some reason

"...watching four rocket engines twerk in unison" Gave me a fit of laughter. From a DS3, thank you Chief.⚓

lmao! Love it. I will never view an engine gimbal the same again!

Somebody should overlay the sounds to get an idea of what it will sound like

The vibrations from the engine would likely break your hands

@@afoxwithahat7846 Actually the sound waves would burst all of the blood vessels in your body if you were anywhere near that building when those rockets went off

@@afoxwithahat7846 Obviously. I was just speaking to how cold the the bells were and giving an analogy

@@imetzl9340 Don't, some people just don't understand expressions

The engine bells and nozzle are about 800 f.. but the hot gas over 1500f.

I don't know when, But just saying it could even make it happen....

Utah Saints.

@@clazza65Kate Bush “cloudbusting”

@@clazza65Kate Bush

@@clazza65Cloudbusting

Ya I would like to see 5 F1s in a test. They didn’t need srb,s

This stack,all up,with however many boosters it's gonna use is still only 20% more powerful than the the 5 F1 engines on the Saturn V! It's cool but kinda embarrassing at the same time. This "brand new venture" is flying on 40+ year old technology! Only reason it ain't flying on 60 year old technology is that they didn't have any flight capable F1s and this new super genius generation couldn't build a copy! So,cool the govt is trying,but damn guys. They designed built and tested those mighty F1s with less computing power than a Casio calculater watch!THEN FLEW THEM BITCHES TO THE MOON!!!!! We can't even get into low earth orbit(manned) with out help!

@@tomcline5631 we need those guys with the white short sleeve shirts, skinny black ties and pocket protecters !!! They got us to the Moon and back with slide rules and pencil and paper. Amazing men.

Ain't no shit! This generation of nerds can't even get outta bed without their computers! These kids can't even read or write in cursive any more! If you left them alone with a slide rule pencil and paper,they couldn't add 2+2 and come up with the same answer 4 times in a row. The govt shouldn't have retired the shuttles without a replacement system Flying. All these bummed rides with the Russians have cost us hundreds and hundreds of million dollars! And I'm not impressed to much with the civilian rocket men they got Workin on private projects. The US needs our own manned orbit capable system that way these civilian private companies can't control access!

And, isn't the exhaust basically water vapor ?

@@Hippida yes

Earplugs an safety glasses ! She'll be right bruv get as close as u want "no wucken furries"!! Hahahahaha

@@Hippida It is fascinating that hydrogen & oxygen, the two components of water, can be mixed and burned to make such fire! And then at the outlet, water is used again to tame that fire!

About the same as a single F-1, but the Saturn V had _five_ of those.

SLS will have 11.9 million pounds of thrust at take off. Who's going in March?!?! I will be there! 007

@@007stopjockin March lol starship will be beautiful when it takes off

@@greatvalue1441 Even more so when it explodes in the air as a result of being rushed.

@@alanwatts8239 exactly, it seems like Spacex rockets explode like every day, and just because musk claims that some rocket that’s never been tested will put 1 million people on mars by 2050 does not mean it will happen, because I guarantee all of his supporters that it won’t

Water based sound suppression system which without it could cause the acoustic energy given off by the engines to damage the vehicle...plus in terms of fuel : 540,000 gallons of liquid hydrogen 200,000 gallons of liquid oxygen

The water evaporates and becomes clouds, the clouds precipitate, no water is wasted here :’)

Plus the exhaust is just water vapor

Is it true that the sound is reduced because the noise from the rocket engine vibrates the water droplets to heat them to a vapor and its that vibration energy that is being used to heat the water instead of continuing on as sound waves?

Go SpaceX and go Blue Origin!!!

Haha. My thoughts exactly. I really didn't think they would pull it off.

@@tonymercer8588 um this stuff is pulled off all the time

@@jptwentyfour887 first try something broke

@@acr5605 Nothing broke first try, just the engines had tight temperature parameters that were breached, but it wouldn't have mattered in flight.

Uh, the RS-25's have a perfect track record during the Space Shuttle program (well minus a sensor that shut one down, but they still got to orbit) - the engine itself is (and has been for decades) a modern marvel, especially given its complexity and reliability. The only thing holding SLS back is politics. Every new administration sends NASA in a different direction, and these days, all the defense contractors want the biggest piece of the pie they can get. It's not really NASA's fault. :(

They have one last hurrah, unfortunately they won't be recovered and them and the boosters will fall into the ocean to never fly again..

It's just pure water, right?

@@notmo. Yup.

Different fuel .

The RS25 are not as powerful though. That's why they need two giant SRB.

If you were right next to the vessel, the sound alone would literally kill you instantly.

You do get a little bit of Nitrogen Oxide (NOx), which is a pollutant. This occurs when the hot rocket exhaust combines with air.

@Veer G did not know that...I stand corrected 😅

How do you think they make the hydrogen? By electrolysis using "green" electricity? Nah, way too expensive. They use regular "grey" hydrogen made by methane steam reforming. That is a process that produces CO2. Add in the crappy solid rocket boosters which produce a lot of *solid* particulate matter and you have a pretty dirty rocket.

Its trapped gas from the exhaust it was expected to happen but during flight it would be put out from low atmospheric pressure

@@notflyingcereal3575 Thanks! A bit unnerving to observe though.

The moment I saw those during the livestream, I thought an abort was coming

It was actually explained during the livestream, shortly after the test was over. Just some insulation used only for the test. It will not be used when the rocket launches.

@@SciNewsRo Thank you!

Yes, they did say that it caused it to rain.

@@my3dviews Awesome 😃

This is common from RS-25 tests and launches. They combine LOx and LH2 and emit water vapor as exhaust.

engrish

they need to fire up all of the rain machines to help cool off the planet

It is pure water vapor, in fact all pure hydrolox engines produce water vapor

The SLS isn't expensive, the development is

@@whyiseverysinglehandletaken2same difference for the tax payers. We pay for it all the same. The program as a whole is just expensive. And yes, even an individual launch of an SLS is still expensive in of itself.

Just for today hopefully:(

Enjoy paying SpaceX 2.9 billions for two moon landings then!

Also known as shock diamonds & mach diamonds ! ! ! 👍👍👍👍👍👍

@@andrewhillis2269 yes it looks like a blue tornado. A tight diamond is preferred and any more than one like we see with the raptor is not desirable.

Hydrogen + Oxygen = water

Today I learned that "Full Throttle" on these engines is actually 109% As Scotty would say: "I'm givin'er all she's got, Captain!"

Yeah, I wasn't expecting that, so I got worried!

They call them shock diamonds

Why?

@@rattywoof5259 sick as in cool.

@@justanotherasian4395 nah hes an idiot, he’s asking why to the “sick as in cool”.

@@justanotherasian4395 It wasn't cool. It was really hot. 😂😂😂

Might as well use an entire lake for testing

They don't use any water, the water is created when the hydrogen burns together with oxygen.

@Smithy18 Never heard of that, is it isolated to the RS-25?

What are you up to?

No. This engine is too big for your honda 😂

The Challenger accident wasn't caused by the RS-25 engines tested here, but the SRBs.

@@fromnorway643 True some o-rings caused the challenger mishap. Going forward the rockets should be pretty reliable. They have had issues with valves and seals in recent tests the boosters are a bit different from the shuttle versions though thankfully.

The Kerosene engines ran rich which produced that soot.

Maybe because they are rocket engines that literally spew fire /s

It's common for areas surrounding the thrust make it happeners to catch fire, it's typically some sort of ablative coating that is burning off specifically to protect the core stage from the bazillion degree heat. You'll see this on most, if not all rocket stages.

Normal in a test condition, the material on fire is protecting the internals. This fire would not be as bad during flight.

CAPU exhaust

It could be that that's what rocket engines do. Just my guess.

Blue Origin bad

ULA bad.

@ ULA put itself as sole launch provider though politics and then took in a free 1 billion a year for doing nothing, stagnating progress as they intentionally moved slow to employ longer.

SpaceX bad 💩

Es vapor de agua y al enfriarse se condensa y llueve. Lo mismo pasa en el edificio de montaje donde se ensambla el saturno 5 llovía.

Could be, pretty water saturated and hot. Not much cooling needed to precipitate out.

Yep

It does, i work on the site, saw a couple tests in person, and got to see this one today.

Yeah, the main thrust of the SLS are actually the Boosters

No. Reusable. One of those was on the Hubble mission and one was on the Shuttle that took the oldest astronaut into space.

especially since the engines are designed for reuse, they are old space shuttle engines

@@MaryJane-sj3gw yup, I knew they were previously flown. My point was they’re not coming back from the next flight.

They are using up the existing 16 engines on the first four flights and then will produce single use equivalent engines, which are supposed to cost less than if they built the same ones as these.

they are using spare engines, once they have used all of the spare RS-25 engines they will make an equivalent engine that is not reusable.

Sorry to give you the bad news, but the SLS with its core having 4 rocket engines, and the 2 boosters, it will have 11.9 million pounds of thrust! Can't wait to see this launch live this March 2022!!! 007

@@007stopjockin 8.8 million actually.

@@nolancain8792 hi Nolan! I recently read that. They must have revised the numbers. 8.8 is still HUGE! I can't wait to see this 1st launch! 007

Recent RS-25 engine gimbal test ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-kVTipN9QmJE.html

8.8 million pounds of thrust

​@@evolicious wrong, it's 2.5 million if I'm correct