"Casual combustion ". As a volunteer firefighter, I'm stealing that for training purposes. "No that's not a backdraft or a flashover. It's just some casual combustion. "

@nobodynemoq

4 жыл бұрын

and remember to tell your trainees "no need to worry however, it gives hardly any thrust" ;)

@cosmicraysshotsintothelight

4 жыл бұрын

THEN, one gets a little 'backdraft'. And shortly thereafter one gets 700 tons of downdraft.

@burroaks7

4 жыл бұрын

The Noosle at the end od the Hoose-- Groundskeeper Willie

@dgarcia0rivera

4 жыл бұрын

Nothing to see here. Just some casual combustion. These aren’t the turbopumps you’re looking for. Move along.

@cosmicraysshotsintothelight

4 жыл бұрын

@@dgarcia0rivera Mongo Like beans!

That's why I love Astronomy and space engineering - it might seem very complicated at first, but when you keep digging deeper and deeper, you'll soon realize that it's even more ´complicated.

@tommypetraglia4688

4 жыл бұрын

But broken down each system within the system is nothing more than tanks, pipe and pumps Incredible feats of engineering for the incredible feat of the lunar landing. Most of the general public takes if for granted WE PUT MEN ON THE MOON... and brought them home

@samsunguser3148

2 жыл бұрын

It makes me appreciate the little things

@waffles9771

2 жыл бұрын

thats why I love it =], its _hard_

@ThePlaton20

Жыл бұрын

The genius of engineering is to take a very complex problem and keep breaking it down into smaller parts until the smaller parts are easy problems to solve.

@tastefulcoder5553

Жыл бұрын

Yeah I know XD

My father in law worked for Rocketdyne from the 60’s to 80’s. He was on the design team for the F-1 engine. He worked with Von Braun’s team in Huntsville prior to the Apollo program. He also worked on the Shuttle program too. His most interesting project was the turbine car for Chrysler. He was loaned out to Chrysler from Rocketdyne. The guy is an absolute genius and I hope that gets passed down to my kids. Best FIL a guy could ask for.

July 20th, 2019. I saw the Apollo 11 50th anniversary movie and was lucky enough to sit in a seat labeled "F1" by my movie theater. a memory I will keep close forever

Saturn V launches never get old to watch.

@dalethelander3781

4 жыл бұрын

I know, right?

@charlesboyer61

4 жыл бұрын

They never got old to see in person, either.

@RCAvhstape

4 жыл бұрын

I can never get over the monstrous power of those engines seen from so close in those launchpad camera shots.

@Ottee2

4 жыл бұрын

I never got to see one blast-off in person, but one year, when I was a kid, my family was on vacation and we visited the Houston Space Center. There was a Saturn V lying on the lawn near the entrance. It was then that I gained an appreciation of the magnitude of this endeavor.

@RCAvhstape

4 жыл бұрын

@@Ottee2 IIRC that one has been restored and placed indoors now. I plan to visit it, hopefully soon.

I love your ultra scientific Minecraft fire graphics!

@cedricdegala184

4 жыл бұрын

That's my favorite

@ziginox

4 жыл бұрын

I thought Doom, initially.

@blueberry1c2

4 жыл бұрын

All you need to light a rocket engine is flint and steel

@Mark-dc1su

4 жыл бұрын

I was almost certain it was from Graal

@jameswalker199

4 жыл бұрын

Oh that's where I remember it from

The slow motion footage of the exaust gasses flowing out of those engines is always fascinating. The raw power in those engines is just staggering. Also... when your coolant is at 1,000 F. lol

@vxzrt

Жыл бұрын

In christ pls what is 1.000 f i dont get it

@mycroft16

Жыл бұрын

@@vxzrt 1,000 degrees Fahrenheit. Imperial units. Works out to 537 C.

@omygod9062

Жыл бұрын

Those exhaust gasses are ignited

@richardstoteler1951

6 ай бұрын

They are not exhaust gasses, the black 'plumes' directly underneath the engine nozzles are unburned supercooled fuel coming from the turbines, thus protecting the skirt of the engine

...how...HOW? can anyone not be absolutely amazed at this engineering. This is such a complex process and it's not all computer driven...mostly just mechanical. All these sequences and all these component designs have to work perfectly. Not to mention all the coordination among these engineers working on the designs and components and having them all fit together and work together. And this is just the main engine...let along the other engines, computer ring, lunar module, command module, the rocket itself, etc. I just shake my head in disbelief that this was possible. Engineering at it's best...!

@davidelliott5843

25 күн бұрын

Before we had email and CAD, people had to talk to reach other. I think this is a big problem today. Everyone makes their nut or bolt someone else puts it together someone else again makes it work. Maybe.

Oh man, I should have watched the video on how to turn off the F-1 first. CAN ANYONE HELP?! IT'S REALLY LOUD!!!

@tobiasvandermeer584

4 жыл бұрын

Just wait until you are out of feul

@Rubensgardens.Skogsmuseum

4 жыл бұрын

Try blocking the air intake with a rag.

@WineScrounger

4 жыл бұрын

Jan M 🤣

@OMG_No_Way

4 жыл бұрын

Hahahaha

@mazocco

4 жыл бұрын

Have you tried to pull off the cable?

2:35 Such schematics really makes us appreciate the countless redstone engineers that worked tirelessly to create such a marvel

@tommypetraglia4688

4 жыл бұрын

Slide rules, mechanical drawings... no computers or models no cad generated prints and schematics Geniuses on and all. Truly Renaissance Men and Women

@mihirpatil8843

4 жыл бұрын

@@tommypetraglia4688 You missed the joke but ok

@Not_An_Alien

4 жыл бұрын

@@mihirpatil8843 Problem might be, there was an actual Redstone rocket.

@mihirpatil8843

4 жыл бұрын

@@Not_An_Alien That's probably not what OP was talking about

@theophrastusbombastus8019

4 жыл бұрын

@@Not_An_Alien a minute of silence for all the creeper died to farm the TNT to lift it off

Just re-reading Chaikin's 'A Man on the Moon': Charles Lindbergh the day before the launch of Apollo 8, asked how much fuel the Saturn V would consume on ascent - 20 tons per second they said. "In the first second of your flight tomorrow, you'll burn ten times more fuel than I did from New York to Paris".

Little known fact is that the Saturn V originally had four engines but due to the fact of the astronauts huge balls they had to add a fifth engine

omg my F-1s have been sitting around idle because I didn't know how to start them. Thanks! 😜 -- srsly tho, thanks for another awesome video!

@WineScrounger

4 жыл бұрын

Lol. I hope you have understanding neighbours over half a mile away.

@KiranAlokkan

4 жыл бұрын

Hope you didn't attempt to start it. Else you would have burned down the whole town.

@user-nu2pj2ch7t

3 жыл бұрын

Karen haircut 🤣

@zhiqiandu3110

3 жыл бұрын

You have a serious gas bill to pay

@MAGGOT_VOMIT

3 жыл бұрын

@@user-nu2pj2ch7t _2 sugarbloods attacked him an alley. One held him down, the other did his Hair._

Even mow 50 years later it still gives me goose bumps to see that thing go up. Amazing.

@Big.Ron1

4 жыл бұрын

Yes, me too.

@thisnicklldo

4 жыл бұрын

Me too.

@trashmail8

4 жыл бұрын

Absolutely, me too! If you haven't seen it yet, try to go and watch the most recent Apollo 11 documentary in a Cinema. Seeing Saturn V launch on a huge screen filled with beautifully restored 70mm film was jaw dropping. Not trying to offend anyone, but it was almost a religious experience. My heart was definitely beating faster than that of the astronauts simply watching this happen.

@Tiisiphone

4 жыл бұрын

yep, major case of goosebumps!

@danielthesantos

4 жыл бұрын

It just gives me geese, lots of them. Of course, I live next to a duck pond and they leave me every spring.

So on the igniter, there is a little "aspirin" tablet that then lights a solid fuel components that looks kinda like a dynamite stick. After numerous successful test, they suddenly started having catastrophic engine failures. They sent the engines over to the vibration and acoustics labs at Marshall in Huntsville. After running numerous test, they couldn't figure out what was wrong or different, until the head shock and vibe engineer (one of the best in the world) noticed a previous good vibration test set that didn't have such a "shocky" graph pattern so early in ignition. Comparing the two test, he realized whatever was going wrong was happening during the igniter start up. He went to the purchasing guy and asked "did you change where you bought these little "aspirin" tablets?" the purchasing guy said "yes, a salesman came in about two months ago and showed these burn much hotter and fit the same spec." After switching back to the old "tablets", the engines went through another successful test...apparently, the hotter igniter tablets were breaking the solid fuel components apart and causing uneven burning that then causes basically a mini-explosion because you started mixing the remaining solid fuel and LOX. So that's how a 80 cent item almost shut down the Apollo fights.

@Ricky40369

3 жыл бұрын

Perfectly explained. Typical, though.

@rearspeaker6364

3 жыл бұрын

wonder what they did with the unused tablets?? or the aspirin tablets that lit your head up!

@NPCNPCB

3 жыл бұрын

Quality Control has entered the chat

@rearspeaker6364

3 жыл бұрын

@@NPCNPCB 1960's style!!

@BrianMorrison

7 ай бұрын

Interesting that the spec wasn't adequate to keep the "super-aspirin" tablet out of the system. I bet someone revised it after this was discovered.

I can never get enough of close up shots of the F1 firing, there's just so much raw power there and thinking of the engineering feats that enable it is just mind boggling and inspiring for an aerospace engineer in training

@twistedyogert

5 ай бұрын

Yet mankind's talents are wasted on trivial things like war.

@Esteb86

5 ай бұрын

@@twistedyogert Indeed. A damn tragedy. Humankind could do so much, if we stopped spending funding and brain power on killing each other.

@Jacksonflax

Ай бұрын

@@twistedyogert Previous wartime development is what made this technology possible

alternatively: just press spacebar. then watch in awe as flames & smoke billow from one end of your rocket, and parachutes deploy from the other!

@eisenklad

4 жыл бұрын

or worse... watch the thing drop when you put the clamp staging first

@beanlegion8529

4 жыл бұрын

mr man or watch it completely split in half because you staged it wrong.

@MrChilliconqueezo

4 жыл бұрын

First rule of ksp is of course more boosters and struts. But the second is.. Check staging. Tho according to my launch history the second rule is rarely enforced

@seanbaskett5506

4 жыл бұрын

don't forget to hit T and Z first

@thefuzzman

4 жыл бұрын

No, space bar is pause, enter is start lol

Okay Scott, you can't just casually mention the pogo suppression system without at least roughly explaining what it ts. I'd love a video (or at least a segment of a video) explaining what it is and how it works 😋

@heatshield

4 жыл бұрын

pogo suspension system is so easy. Its just a spring in a tube. You jump up and down.

@thomasfholland

4 жыл бұрын

heatshield 👍

@GlanderBrondurg

4 жыл бұрын

Pogo in this case was a problem identified early in the development of the Saturn V. As fuel gets burned in the engine it produces thrust and acceleration. That acceleration increases the tank pressure thus also increases the amount of fuel burning to cause the turbopump to spin faster in a positive feedback loop. Some valves try to slow down the fuel flow so it doesn't destroy the engine, but that causes acceleration to drop and a reduction of pressure, so the fuel valves open up to compensate. Unfortunately the opening and closing of the fuel lines aren't instantaneous, so that creates an oscillation of high and low acceleration. In other words, pogo. It causes the whole spacecraft including the astronauts to shake violently potentially killing astronauts and destroying the spacecraft too. Trying to keep that under control is why rocket scientist get paid the big bucks.

@KayoMichiels

4 жыл бұрын

Vintage already has a video explaining what it is: kzread.info/dash/bejne/ooOD1LqQfK_gkZM.html

@eugenecbell

4 жыл бұрын

GlanderBrondurg, thank you for the POGO explanation. Do you know at what cyclic rate this POGO oscillates?

I always love watching the side view of engine start. Watching that plum of smoke and flame get sucked back down through the launch stand is amazing.

I've looked at Saturn V engines roaring away about 100 times... i never get sick of looking at them. I was at the Cape in '85 to see shuttle STS-62 night time launch... WOW.. .. You hear people talk about the crackle, and just how loud the crackle is... God it sounded good.

I've known for a long time a rocket engine is far more complex than just a chamber that burns fuel and oxidiser but this blew my mind as to the true engineering magic that goes into them. Beautifully explained Mr Manley! Thanks.

@vxzrt

Жыл бұрын

The f1 engine is EXTREMELY complicate to made in this day the only thing What can help the nowdays enginers are the blueprints but they are in a secret place somewhere in nasa facilities Almost 60 years later there is no enginer Who can totaly dominate the f1 engine even the best of the best today

When Jack King NASA PAO announced "ignition sequence start", his voice charged with adrenalin, my 8 yr old imagination lit up like those F1's, my heart raced like the clappers, and my mouth dropped open. What a ride Apollo. There's never been a Global adventure quite like it since...

@trespire

4 жыл бұрын

When engineers are set a task, and let loose to get it gone.

@tommypetraglia4688

4 жыл бұрын

I was 9 in 69 and today I'm there again but now with some knowing of how great it really was.

@gasdive

4 жыл бұрын

I was 6, and I'm as excited today as I was then.

@Zoidberg227

4 жыл бұрын

Ever listen to the GO/NO-GO poll for the landing? One of the controllers (Guidance) was definitely feeling that excitement.

@miketype1each

4 жыл бұрын

He was so charged up that he said, "All engine r-unning". He noted later that he said it that way. Apollo 11 was the big one. I was 7 at the time, and everyone was excited about it.

I’m 50 years old I’ve been interested in this for 35 years thank you for the explanation

It's crazy to think that less than 100 years before the Saturn V, we humans were still walking or riding horses

@entangledmindcells9359

Жыл бұрын

There were still folks in the rural US that still did not have indoor plumbing at the time of the Moon Landing.

People should also remember that there were four launches of Apollo in 1969. Apollo 9 in earth orbit, testing the Lunar lander for the first time, Apollo 10 which was a full up dress rehearsal of the lunar landing, Apollo 11 and Apollo 12, both of which landed on the moon. So it's a 50th anniversary for all those crews!

@Andrew-13579

4 жыл бұрын

Yes! Apollo 9, 10, 11 & 12 were all Saturn V boosters, too...March, May, July & November of '69. Did we ever launch 4 Space Shuttles in one year? It looks like Apollo 10 still holds the world's record for fastest manned craft (Earth ref) at 24,791 mph. 50-year-old speed record!

@Andrew-13579

4 жыл бұрын

Including Apollo 8 in Dec '68, that was 5 manned Saturn V boosters inside of 12 months...with 4 of them sending Apollo to the Moon. Will we ever see such a thing again? Doubtful SLS-Orion ever will. Come on, Starship!!

@charlesshreeve319

3 жыл бұрын

I was 12 in 1969. It was a great time to be a kid!

@slpybeartxtx3006

3 жыл бұрын

@@Andrew-13579 Yes, we launched 6 times in the period from 2/3/1984 - 1/24/1985 and then we launched 10 times from 1/24/1985 - 1/12/1986. I think SpaceX will beat these frequencies though.

@reubenmitchell5269

2 жыл бұрын

@@slpybeartxtx3006 they certainly did unmanned but maybe wont manage 5 manned in one year

2 tonnes of fuel per second? And I thought my kia was bad.

@-danR

4 жыл бұрын

What amazes me is that that stuff is being driven through by turbine disks only a foot and change in diameter.

@TheErilaz

4 жыл бұрын

The fuel pump delivered 15,471 US gallons (58,560 litres) of RP-1 per minute while the oxidizer pump delivered 24,811 US gal (93,920 l) of liquid oxygen per minute. Thats for one engine.

@jimbarino2

4 жыл бұрын

@@TheErilaz The fuel pump on 1 F-1 used about 50,000 horsepower...

@Calilasseia

4 жыл бұрын

It's actually a little more than that. Total propellant consumption rate at full throttle for all 5 engines together, is frequently quoted as 13 tons per second. However, this ferocious rate of propellant consumption has an advantage - the booster stage becomes lighter by the same amount. So, by the time the propellant is running low, the entire Apollo stack has shed, wait for it, some *two thousand tons* of mass. By this time, the booster stage has done its job, lifted the stack to an altitude of about 38 miles, and the second stage takes over. Two thirds of the mass of the Apollo stack has effectively vanished by the time the second stage fires up.

@adamkendall997

4 жыл бұрын

Kia is a vastly superior machine..

Scott, I want just to tell you since I was a young child I have always been interested in rockets and space. I watched every Apollo launch and everything thing I could see on Apollo 11, and the moon. I have learn so much from your videos, I just wanted to say thank you.

@davidpoynter6546

4 жыл бұрын

I believe that we should have never stopped going to the moon and at this point in time we should have had a fully functional moon base that would have been in operation for years. This should has happened before the ISS was even started.

Five of those babies firing would drain our swimming pool in under 4 seconds.

Excellent! Simply superb! Eight minutes and change, and I learned more about the Saturn V launch than I have in the last 50 years. Thank you, Scott!

@PTuffduty

3 жыл бұрын

that’s my point. the most important information and I know it now.

How to turn on a rocket engine. Press Z, then Spacebar

@Atlessa

4 жыл бұрын

'Y' on german keyboard layouts.

@jorgeaugusto1867

4 жыл бұрын

My sequence is T, Z, spacebar

@pegasusted2504

4 жыл бұрын

i found it was mostly "forget" to ramp up the engines then press z.

@coffeecup1196

3 жыл бұрын

@@jorgeaugusto1867 Z, Space, Revert to launch, T, Z, Space is mine

And THAT folks, is why they call it 'rocket science'. The concept is simple to understand: chemicals combine and burn and you get thrust, but dam if the actual engineering isn't hard as hell. Glad Scott Manley gave a rather simple diagram for non-rocket scientists like myself to understand. Keep up the good work, Scott Manley.

It's even more impressive when you think about the relatively limited computer aid available to the engineers at the time. Marvelous engineering that still fascinates me to this day. Thanks for the great video 👍

Simply wonderful, I was 7 50 yrs ago and always wanted to know more about the missions

@tritop

4 жыл бұрын

I was 8 and wish my father would have take me there to whitness the start

Thank you! Finally, a decent video on how to operate my engines! No instructions were included with purchase.

this is part of my "things to know just in case i ever need them" Playlist

It's always fun to listen to Jack King say "Ignition sequence staaht!"

@glenchapman3899

3 жыл бұрын

"All engines running....Lift off........we have a lift off 32 minutes past the hour" Still gives me goosebumps

@rohil3023

3 жыл бұрын

Ikr!!!

Brilliant explanation of a stunning triumph of engineering.

On holiday. Enjoying a dram. Just learned how a Saturn V engine works. Surreal.... And wonderfully more enjoyable than watching TV! Scott, you're doing a grand job. Thanks 👍

Too many brains were hurt making this video. Thx a lot!

This is your best since I found your channel, Scott, and that says one hell of a lot.

That was tightly packed 8 minutes 😊. Great work!

Great editing Scott! Loved that you explained everything, then showed a couple of shots of the startup sequence. I was totally able to follow along with the whole process you just explained. Awesome!

NOTHING SIMPLE ABOUT THE F-1 ENGINE ! An engineering marvel, even by today’s standards! And considering it WAS ‘The First ‘ makes it even more amazing! More details of the Saturn V are explained on utube posted by ‘ Smarter Every Day ‘ ! Things always seem Easier AFTER the first successful model! First time, Not So Much !! Great post here ! Thanks!

This is the perfect amount of detail for me. I would love to see a similar video for other engines!

@reubenmitchell5269

2 жыл бұрын

watch everydayastronauts video on the various types of rocket engine

Need a video completely dedicated to Pogo suppression systems!!! Great video tho!!🤩

@StreuB1

4 жыл бұрын

Acceleration induces increased head pressure in the tank which increases injector pressure which increases Pc which increases thrust, increase in thrust increases acceleration which increases head pressure in the tank, and on and on and you get this positive feedback loop with a period equal to the latency time between head pressure rise and the vehicle responding to the increase in thrust. The higher the hysteresis, the worse the feedback loop can be. On small vehicles, it can be mitigated purely by the fact that the system cannot respond fast enough to induce the oscillation. So, the systems acts like a pogo stick oscillating up and down as pressure, thrust and acceleration chase each other.

@likhiiiii

4 жыл бұрын

theretep64 Jus thought of doing it!! First time!! So I was a bit excited!!😶😶

@likhiiiii

4 жыл бұрын

Darius Kang 😂😂

Scott, incredible video. I spent 10 years working on AE2100-D3 engines for the USAF and consider myself an expert on them. The science here makes me feel like an idiot. Thank you so much for doing the research on this and presenting it in such an awesome way. I could watch this over and over.

Those engineers were badasses as were the men who strapped on the rockets. Awesome video.

The more I learn about the Saturn rocket program -and particularly F1 rocket engine development and engineering, the more stunningly brilliant I find that the NASA scientists were (are?)! Their acute understanding of how these F1 engines worked (and what physically needed to take place within them to make them work well), combined with the sheer simplicity of their design, stuns me. I am simply AWESTRUCK by what they accomplished (working essentially from scratch) in just a matter of a few short years, using what would be considered by today's standards rudimentary engineering tools, is amazing. It’s no wonder why today we refer to someone of incredible intelligence “…a rocket scientist”!!!! These folks set the bell curve long ago!!!

It's much better than looking at an in-depth literal description of the sequence in an Haynes manual for the Saturn 5.

@OldBenOne

4 жыл бұрын

Cby 0530 So the next video is going to be the brake booster on a 1988 Doge Caravan?

@Cby0530

4 жыл бұрын

@@OldBenOne lol.

@drw1926

4 жыл бұрын

"Haynes manual" LMAO!!

@mikefrerichs8860

3 жыл бұрын

@@drw1926 There is one. Look it up on Amazon. "NASA Saturn V 1967-1973 (Apollo 4 to Apollo 17 & Skylab) Owners' Workshop Manual" Unfortunately a Saturn V won't fit in my workshop. Guess I'll have to work on it in my driveway. Hope the neighbors don't mind.

Very well explained Scott. Being an Engineer myself I thought that your explanation had all the necessary components but delivered so that non Engineers could understand.

I was really curious about the "blips" in the thrust profiles for engines 2-5 when you showed the graph. So glad you explained it! Great video as always

People just don't realise what a monumental achievement the Apollo program was. It ranks among the greatest - if not THE greatest - engineering achievements of mankind.

@dannywest903

3 жыл бұрын

And, all calculations were done with a slide rule.

@rearspeaker6364

3 жыл бұрын

@@dannywest903 that is the most amazing part! today's "calculated"designs are too close to failure 95% of the time.

@beeble2003

3 жыл бұрын

Wuh? Do people really not realize how amazing Apollo was? _Really?_

Hat's off to the men and women who thought up this stuff. Amazing engineering! And that's just the engines!

This has to be one of my favorite videos you've produced... Simply stunning!

Super informative! How often have I watched slow-motion videos of Saturn V launches... now I know what is happening. Many thanks!

given that they had no CAD, no fluid dynamics simulations, mostly slipsticks & trial & error and dedicated intuition - the F1 engine is an absolute marvel of engineering. And then to go from 0-100% thrust in 9 secs? I can't even get my car started that fast ...

@jdrok5026

4 жыл бұрын

@Alan Tang a lot of the design required hands on work tho. Even today cad is not the end all be all of your design process.

@paulmichaelfreedman8334

2 жыл бұрын

@Alan Tang Productive graphic CAD design with capable computer mainframes was instigated by the design of the space shuttle, which was mostly designed in graphic CAD, starting in 1968. Thanks to the shuttle graphic CAD design made huge leaps forward in the 1970's. It was necessary due to the complex shape of the shuttle. During the mercury era and gemini era, CAD was non existent. For Apollo, CAD was limited to parameter-fed algorithm number crunching, no graphics and no complex designs.

That's very helpful, I can never get mine to start right!

You lost me at "Hello", but I watched the entire episode in gleeful admiration.

the complexity, size, fury and success of these engines has always astounded me. The people who engineered these things are phenomenal.

This whole time I thought someone with a BBQ lighter just lit the bottom and ran. Who would of thought it was more complicated lol wow

@samarvora7185

3 жыл бұрын

"It must be damp."

@johnstreet819

3 жыл бұрын

that's the way the Soviets did it for years

Amazing as usual. Waiting for the episode with CuriousMarc channel :)

Great job explaining the basics of the S-V rocket start up. Thanks!

I am so glad I've found this video...I was having one heck of time getting my F-1 started...I think you've helped clear up the problem..

You can appreciate why Bob Truax went with dirt-simple pressure-feed with the Sea Dragon concept.

@reubenmitchell5269

2 жыл бұрын

shame it was never built, but it would have been too slow IIRC it would have staged at only 50km?

can you explain how the gimbal works? putting 700 tons on a strut and making it move at the same time seems quite the engneering challenge

@tippyc2

4 жыл бұрын

That's probably the simplest part of all of this. Imagine big hydraulic rams like you might see on construction equipment. That's basically what they use to move the engine. The engine thrust is in line with the pivot, so the thrust doesn't try to pivot the engine. That's important because it means the rams (called actuators in a rocket engine) only have to push a small fraction of the thrust force. The control system is just a feedback loop which controls the hydraulic valves. It's the kind of thing you could do yourself with an arduino these days, but I believe the Saturn V used some sort of analogue system to control the engine gimbals. The bps.space channel has several videos of amateur rockets with gimbal capability, and he explains how he does it if you're still curious.

@athr_blu

4 жыл бұрын

Nice idea, tweet it to him

@PatrickKQ4HBD

4 жыл бұрын

SECOND!

@manlymcmanface9932

4 жыл бұрын

Great idea, I keep wondering about this, too! On these technical drawings I always look at the upper narrow parts of the engine (where I suppose much of the upward force applies) and wonder how the hell does it stay in one piece? Especially with gimballing going on. The forces have to be humongous! Also, isn’t it a lot more than 700 tons in case of Saturn V?

@joevignolor4u949

4 жыл бұрын

There is a large X shaped universal joint on top of the engine that is rated to carry the 1.5 million pound thrust load imposed on it by the engine. That lets the thrust chamber and engine bell move back and forth in two axis. The engines have two mechanical arms that are welded to the thrust chamber 90 degrees apart. The arms are several feet long. There are two hydraulic cylinders connected between the ends of the two mechanical arms up to the rocket's structure. As the hydraulic cylinders extend or contract they move the engine back and forth. By moving the two cylinders together in tandem the engine can be pointed in any direction up to the limits of the cylinders. The hydraulic fluid used to move the cylinders is actually pressurized rocket fuel coming from the fuel pump. The fluid is controlled by a flow control valve to move the cylinders in and out to move the engine back and forth. The control valve is in turn controlled by the flight control computer up in the Instrumentation Unit (IU) sitting on top of the third stage. The IU has a gyro stabilized platform that moves on 3 gimbals to give the computer attitude information and it carries 3 accelerometers to provide the computer with acceleration information. This allows the computer to gimbal the engines and keep the rocket pointed in the intended direction and following the correct trajectory.

Exciting! I'm glad you're here to tell us these things Scott!

Wonderful breakdown of the startup sequence, thank you! I love the punchline at the end.

Ohh, thanks man i have one of these sitting in my drive way and couldn't figure out for the life of me how to get it to turn on.

Just totally amazing just how complex these systems are. Of course breaking them down to their basic components helps to understand, there is so much more going on that it just is almost impossible to comprehend . The F1 engine is by far the most complex piece of machinery every created by the hand of man, complexity to the point where it cannot be replicated today, even with all modern technology, it can’t be done!

Engine fires in the sequence 1-3-4-2, just like a Morris Minor!

Such an iconic set of words “ignition sequence start“

This is a beautiful explanation of a gob-smackingly incredible feat of engineering. 👏🏼

There's a video on why we can't make these engines today. I think it's made my Curious Droid. You would think that with our level of technology today we could not only make them again, but make them better. Not even close. Much of the work was done by engineers who were making changes on the fly. The main design would be considered version 1.0. The engines on the actual Apollo were using version 4.5 (a rough analogy) all those changes/updates/mods were kept in each engineers notebooks, which we don't have. And a lot of it was in their heads, which we don't have (lol) And much of the machine tooling, like the massive presses, punches and brakes are gone. It's a fascinating video to watch. I don't mean to talk about another's video, but I think it dovetails nicely with this video. Well made and researched. Liked and subbed.

@donnebes9421

3 жыл бұрын

00UncommonSense00 if that’s true there’s no better example of lost technology. Which makes you think about some of the things on earth that nobody can figure out how they were done.

@KingdaToro

2 жыл бұрын

We couldn't recreate the exact flight engines used on Apollo, no. But we can absolutely improve on it. Look into the F-1B proposal. It eliminates the gas generator exhaust manifold (replacing it with a straight pipe) and the nozzle extension, and replaces the brazed tubes of the thrust chamber with a milled channel wall nozzle like the Merlin. That would have meant a part count of about 100, compared to 5000 for the F-1. It would have been throttleable, too. But ultimately there wound up being no need for it.

Hi Scott, Great video as always. Another detail you didn’t mention was that when full thrust was detected and normal engine performance confirmed the hold downs would release; but they did so in a fashion that was almost instantaneous so a means was needed to transfer the thrust to the vehicle over a (short) period of time. This was achieved with a set of tapered pins and corresponding dies through which the pins were pulled. These were called Controlled Release Mechanisms. On the sides of each hold down arm structure were secured the tapered pins. Special dies were very firmly secured to the lower rim of the launch vehicle such that when the hold down arms released, the dies had to pull the tapered (and larger) pins through them. The physical design and metallurgy of the components meant that transfer of full thrust to the vehicle occurred not instantly, but was spread over the first few inches of upward travel thus ensuring that dynamic loads at liftoff didn’t exceed vehicle tolerances. www.capcomespace.net/dossiers/espace_US/apollo/ksc/LUT/LUT%20HDA%20TSM.jpg

@alpurl

2 жыл бұрын

This is neat info. Very cool. THANKS for sharing!

Thank you. CHEERS from AUSTRALIA.

Watched the video for the third time today. I never get tired of seeing the initialization of the F-1 engines, while in my head the start command I watched and heard as a kid is playing..."10, 9, ignition sequence start..."

Petition to bring back the X-Wing intro back!

Everybody gangsta until somebody starts launching the sea dragon

@vincentvoncarnap2473

3 жыл бұрын

Breaking news: crime rates rise to 100% forever

Great video Scott! No matter how much I learn about the Saturn V and the rest of the Apollo hardware, there are always more details under the details.

Awesome Scott! The F1 is by far my favorite piece of flight hardware of the Saturn V! An awesome engineering feat!

You're the manliest Scott I know

My house burned down. It was never stated I shouldn’t start my f-1 inside to show my neighbor I do in fact know how to start it.

Truly fascinating! thank you! I can now watch the footage of the launches with a new understanding and appreciation!

Amazing! The complexity of all the systems having to come together in concert is astounding. It's equally amazing that they were able to place men on the moon with this technology.

Much easier than figuring out the remote for the tv. 🤣

What other people think when i say i'm a F1 fan: 🏎🏎🏎 What i actualy mean:

Thanks for the very clear explanation! I have always wondered about that and didn't realize how complicated it was.

Excellent presentation! Very clear explanations of the entire start sequence. Just what we're used to seeing from Scott Manley.

Did anybody else notice all the thermal insulation on the engines at the end of the video? All the engines had insulation around them, to protect them from exhaust backflow during flight... something that you generally don't see on engines displayed at museums.

@NoNameAtAll2

4 жыл бұрын

Asbestos Not safe for a museum

@drtidrow

4 жыл бұрын

@@NoNameAtAll2 Not all of it was asbestos. Not many people know what they looked like on the actual launch vehicles... would be nice if at least one location had two engines next to each other, one 'naked' and one 'dressed' for launch.

2:45 accurate diagram of how Minecraft Galacticraft rockets work

@eisenklad

4 жыл бұрын

Hold space to slow down

@cowcannon8883

4 жыл бұрын

I'M PRESSING SPACE IT'S NOT WORKING *crashes

@ThijsWasTaken

3 жыл бұрын

@@cowcannon8883 I miss those days

Real men love Scott Manley! Another wonderful video. If I could not watch these I would never attempt to become a rocket surgeon at the age of 59! But, because of Scott, I can pursue my dream... if only in my mind! Where was this stuff when I was going to school? A teacher like Scott could keep all of the students engaged and really learning!

I was a kid during Apollo and Gemini and it was a huge thrill to see a rocket launch on black and white TV. Nice video Frank

Great, but now I need a video on the POGO suppression

@xureality

4 жыл бұрын

It's basically water pressure regulation, but on rocket fuel. - Fuel/Ox burns and produces thrust, causing pressure to rise in the system because F=ma - More pressure causes turbine to spin faster causes a positive feedback loop - Too much pressure means fuel lines burst means you don't go to space today (or if you were on the rocket, possibly ever again) - Engineers built a regulator valve, it stops fuel lines from bursting alright, but it can only open and close so fast - Oscillation ensues, manifesting itself in the form of rocket thrust going up and down And that's pogo, which is a no go. And so engineers come up with a question: rocket fuel is incompressible, what if we have something compressible to "surge" into to dampen the pressure oscilations? In principle, this is exactly just like a shock absorber on your car, and for once, in practice, it is a shock absorber grafted onto the pipeline. Yes, literally a tube with some gases (spring loaded piston in gemini, later on in apollo they use helium), Modern rockets still does this, but they actually are calculated to eliminate pogo entirely instead of being a mitigation strategy.

@cowboybob7093

4 жыл бұрын

Look through a copy of _On The Shoulders Of Titans_ - NASA has it in HTML and you can find it in PDF and even book form. There's several pages dedicated to POGO and how it nearly sank Gemini as we know it.

@Mp57navy

4 жыл бұрын

I went out on a date, With a girl, a bit late, She had so many friends, Gliding through many hands. I brought my pogo stick, Just to show her a trick, She had so many friends, Gliding through many hands. Jump pogo, Bounce pogo, Down, up Jump, bounce, up, down

@MrJackHackney

4 жыл бұрын

Apollo 6 videos talk about the Pogo issue

@chris-hayes

4 жыл бұрын

Videos about water hammer suppression will be very similar to POGO suppression and there's much more of them

Very interesting, and most if not all of this was developed by engineers and scientists not using computers but slide rulers and there brains. Amazing simply amazing!

Thanks for making the complex easy to understand.

This is probably one of the coolest videos ever. Thanks Scott.

hi! Idea for a future video : what is the internal sturcture of a rocket, the structure that makes it stay as it is, and which preserves its integrity when the mass opposes the thrust? Which part of the engine supports all that mass?

7,000,000 + POUNDS of thrust - how insanely awesome is that?!?

@SimonBuchanNz

4 жыл бұрын

Well... 7 million Newtons, which is about 1.5 million pounds. Still a delightfuly ludicrous amount though.

@SvenSchumacher

4 жыл бұрын

In Fakt 7000kN (one F1-engine) are 1,573,662 lbf ... And there are 5 engines with that 7000kN. So that are 7.9 million lbf together. That's insane!

@SimonBuchanNz

4 жыл бұрын

@@SvenSchumacher my mistake! Correction welcome!

@Anvilshock

4 жыл бұрын

@@SvenSchumacher 35 MN are a lot less insane than 7.9 million idiot units.

@SvenSchumacher

4 жыл бұрын

lol, good point ;)

Thanks Scott, that was succinct, clear and very well presented. Answered all of my questions about the F1 startup.

The engineering in it is beyond ,how those engines didn't just drive up through the rocket with all that weight above is incredible, wow !!!!!!