Deliver Us Mars - Three

Welcome back to Teenagers in Space! It's time to go to Mars! Or at least get into orbit without anything going horribly and fatally wrong.
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[@darkflame8]

Just remember, the people that built the rocket, the launchpad and your spacesuit are the same people that built that ladder from the first game. You know, the one that fell off the wall and broke into several pieces.

[@nickhutton9216]

That's a scary food for thought

[@timothyrowley7174]

When you use the contractor who gives you the lowest bid.

[@PsychoHam]

@@timothyrowley7174 i have a feeling in the world of Deliver us, there is no contractor with the lowest bid. there's just "the only contractor"...

[@NotALot-xm6gz]

And they had to cut corners on this rocket…

[@Julius_Hardware]

Don't worry, Chief Engineer "Gnome" McJingles has checked everything. It'll be fine.

[@GoSlash27]

The problem with the Saturn V's F-1 engine was combustion instability, not physical instability. Areas of rich and lean combustion would race around the face of the injector plate in circles at a resonant frequency that would destroy the engine in a matter of seconds. This was a result of the size of the engine and thus the sheer surface area of the injector plate. Their solution was to try random arrangements of injectors and baffles until they found one that didn't blow up, even when a bomb was detonated near it. The scary part was that they never figured out *why* their arrangement happened to work and had to take it on faith that the problem wouldn't return during a manned flight.

[@wojtek4p4]

IIRC one of the ways proposed F1 modernisations (F1A or F1B) increased available thrust was removing those baffles and figuring out something less junky. Can't find a source for that though, so take this with a pinch of salt.

[@KPen3750]

What I read was a lot of the scientists did have active religious faith. So I guess they found it easy to put their faith in god on that fateful day in 1969

[@spudgun1978]

Max Q is the Maximum Dynamic Pressure that a vehicle contends with during atmospheric flight, basically at Max Q they throttle down the engines so that the ship doesn't rip itself apart due to the pressure of the air against the skin of it.

[@DoomWarriorX]

if we already at it. If the rocket looked like a Proton - you shouldn't be that afraid - those are very reliable. You properply thoughed of the N1 (the soviet moon rocket). And if a rocket can be throttle or not depends on the rocket engine not on the age. Solid rocket motors like the things dropped from the space shuttle are fixed power, while liquid rocket motors are most of the time throttable. Another thing not every rocket motor can't be started several times, some need gravity to provide "fuel" for the engines and so on. It is rocket science after all ;-)

[@Penfolduk001]

Doesn't Jingles watch SpaceX/NASA livestreams? MaxQ and Strongback are basic spaceflight terms. As well as the in-cabin zero-G indicator (cuddly toy) 😁

[@echomande4395]

Maybe Jingles should take a look at Kerbal Space Program 1 or 2.

[@wierdalien1]

@@echomande4395 2 is coming out soon weewwwwwhhhhh

[@DoomWarriorX]

@@echomande4395 puh don't know, would properply only scream at the screen. But it is part of the fun right? 😅

[@Penfolduk001]

‘I felt exactly how you would feel if you were getting ready to launch and knew you were sitting on top of 2 million parts - all built by the lowest bidder on a government contract.’ - Attributed to John Glenn

[@TerribleHeresy]

So between last episode and this I've had another thought. This mission is to go to Mars and I assume negotiate with the exodus members for them to give up the Arks they need to terraform Mars. From the recording we heard it sounds like Isaac is on Mars. Knowing this, Earth decided to send a crew that consists of his two daughters, the woman he stabbed on the Moon and new guy who has no history so can safely be killed off to build drama. I feel like this could cause some issues between his daughters potentially switching sides to long held grudges bubbling to the surface.

[@undissatisfied1557]

I'm going to watch Jingles anyway, but I think you may have nailed the plot.

[@TomBrady2316]

holy autism

[@hampshirewanderer5078]

"They almost built it right!" I'm sure that should be an unofficial company slogan, somewhere.

[@em1osmurf]

military slogan: "The right way, the wrong way, and The Navy Way." yes, when ordered to do something that made no sense, i received that justification during my career. headlines aside, there are reasons the hammer cost $500, and toilet seat $300. i have tools (that got "liberated") which look like brand new after 30-40 years of use. "Mil-Spec" is pure fsckin' magic.

[@jackee-is-silent2938]

Jingles is spot on about the problems with that damage to the engine bell and how disappointing something so wrong should be put into a game. As well, collisions with orbital debris wouldn't leave things the way they appeared. In reality, a damaged engine should be disabled and the only cutting involved should be to cut off most of the bell to dump now useless mass. The burns will now have to be longer on the remaining engines. The only things where the loss could cause a mission failure is landing and taking off from Mars.

[@leeshackelford7517]

Watching videos of launches that went wrong (amateur launches with self-built parts)......some spectacular-looking explosions

[@ssz2150]

4:30 I'm sure this scene was meant to be great and tension-inducing. And all I could look at was that creepy stare-of-death from the MC.

[@BArro390]

Watching Jingles bungle and bumble with the command module controls in confusion, trying to fiddle them in the correct position...ah Jingles, never stop being crap.

[@AtholAnderson]

That and after the first 'diving' cut scene where he gets lost in a straight corridor.

[@WalterReimer]

Of course they repair the thruster, Jingles - remember, in Far Cry 6, you could fix a truck or a tank with a blowtorch.

[@82aleca]

"What was that"... Literally the first words spoken in Serenity by Capt. Mal! 😆

[@VekhGaming]

Max Q is basically the point at which there is maximum aerodynamic pressure on the spacecraft. So it will keep going faster, but after Max Q the air is also getting thinner fast enough for it to start mattering less.

[@SalvaBarbus]

That big pipe that you were cutting is, if I remember correctly, the fuel pipe. In other words, where the liquid oxygen goes through before entering the combustion chamber. It served also as active cooling, so that the nozzle didn't melt itself. As you said, if they put it there, it's for a damn good reason!

[@thomas.02]

If they’re basing the design off the F1 and my memory serves, the big pipe on the outside pipes the turbopump exhaust into the inner walls of the nozzle to cool the nozzle walls - i hope i made sense

[@randolphphillips3104]

O2 is oxidizer, not fuel.

[@masterdynamo6457]

@@randolphphillips3104 Oxidiser is a component of rocket fuel. So, in fact, calling it a fuel pipe is correct.

[@wojtek4p4]

​@@thomas.02 Can confirm, it's a turbopump exhaust manifold. It's not a cooling fuel (or oxygen) pipe before it enters the combustion chamber - these pipes are way smaller. The nozzle walls are practically made out of fuel pipes. And IIRC the liquid oxygen wasn't circulated inside the nozzle for a simple reason - metal is technically flammable, and oxygen it very good at setting _technically_ flammable things on fire.

[@imjashingyou3461]

Your combustion chamber is above the the exhaust bell. The exhaust bell is for shaping the flow and expansion of exhaust gasses. And you can have many different shapes to it.

[@j.j.maverick9252]

the underwater sequence demonstrates perfectly why you never leave your dive buddy. Dad didn’t teach the basic rules before diving with his own daughter…

[@leeshackelford7517]

Yeah....I was taught that back in the 70s. So much wrong with this BS game

[@cameronmcallister7606]

The thing about this game is that, despite having fairly rudimentary graphics, they do show you exactly what they need to, and manage to look good doing it. This is like minecraft, or even Skyrim, where the limited graphics are used just so to tell the story they want. Time will tell if it holds up, but I like the look thus far.

[@AnotherDuck]

While I agree with showing what they need to, I'd argue with looking good. I find that the faces and models fall into the uncanny valley a lot. They look both older and younger than they're supposed to be.

[@thomas.02]

I’m assuming the devs based their engine design off the F1 on the Saturn V. In that case, the big pipe that was cut off around 23:00 is the turbine exhaust manifold, which pipes the exhaust gases from the turbopumps running the engines to the inner walls of the nozzle (because for the nozzle to not melt, hot exhaust gas is still more friendly than very hot combustion chamber gas). By that, they will still have serious problems with 1) the “pipe-less” turbopump exhaust now pushing the ship in an unwanted direction, 2) nozzle overheating because it’s exposed to very hot combustion chamber gas instead of just hot turbine exhaust and 3) turbulent flow of combustion chamber exhaust around the holes that the debris created in the engine nozzle. I’m guessing factors 2 + 3 is what caused the nozzle to finally crack during the crew’s arrival at Mars.

[@Nautules83]

I was also wondering what would happen the symetry of the thrust. If you remove one engine the spacecraft will want to violently turn if you fire the remaining two. It will be very tricky to make accurate burns with asymetrical thrust.

[@thomas.02]

RCS is “reaction” control system instead of “rotational”. Full disclosure, in my early space nerd days I thought it was rotational for longer than I dare admit

[@abercrombieblovs2042]

It happens to all of us

[@JohnWilliamNowak]

Except for Gemini, where it was "Reentry Control System" and the RCS was the "Orbital Attitude and Maneuvering System."

[@katherinelovelace5502]

At 25:00, this is actually a cold fuel pipe. This engine is based on the F1 Rocketdyne engine, as you correctly assumed, which uses a film cooling method. They inject freezing cold Rocket Propellant 1 (RP-1) into the nozzle at about the half way point down. This keeps the very hot exhaust gas coming from the combustion chamber from completely melting the nozzle. It is correct to assume that cutting this pipe would cause the engine to explode. On later models of engine, like the RS-25 engine, the nozzle would actually be made of tiny cold fuel pipes that pump liquid hydrogen around and keep the nozzle cold that way. Another option is to use ablative cooling by coating the nozzle in graphite, which is designed to flake away as the engine fires, but this means the engine is only good for a few minutes and it can't be re-used. In my opinion, the best course of action in this kind of accident is to either return to Earth and swap out the engine or just ditch the engine and run on two... depending on the Thrust to Weight ratio (TWR) of the craft and if it has engine-out capability or not.

[@darthkarl99]

For a craft in orbit using chemical engines it's unlikely a dud thruster is any kind of issue. the burns will need to be longer, but your not fighting gravity like during launch.

[@randolphphillips3104]

For the fuel to "explode" you would need oxygen. Should not go bang with a laser cutter.

[@SecretRaginMan]

Actually, it wasn't a "cold fuel pipe" on the F-1 but an exhaust pipe from the fuel rich turbopump. Moreover, the F1 engine did also use regenerative cooling above that point. Furthermore, it was actually the combustion chamber itself that kept exploding because of combustion instability. They needed to figure out the right configuration of the propellant injectors through trial and error since computer modeling was decades away.

[@Nautules83]

I was also wondering what would happen the symetry of the thrust. If you remove one engine the spacecraft will want to violently turn if you fire the remaining two. It will be very tricky to make accurate burns with asymetrical thrust.

[@katherinelovelace5502]

@@Nautules83 This is another reason why rockets have the ability to “gimbal” or rotate the engine by a few degrees. If one engine goes out, the others can steer the vehicle and keep it on course and throttle up. Some vehicles have even made it all the way to space with broken engines. The space shuttle did so before. This is also why shuttle had her main engines mounted at an odd angle instead or facing directly forward. When attached to the rocket boosters and fuel tanks it throws the center of mass off, and as fuel is drained form the tank the engines have to compensate for that too by tilting more.

[@setesh1294]

Puzzles in this game were actually easier than the first. As a massive spaceflight nerd, they got much of the terminology right on. As for Max Q, it's the maximum aerodynamic pressure on an aerospace vehicle. Typically only used for space launches.

[@korbell1089]

Jingles walking away whistling; "It wasn't me!"🤣🤣

[@thomas.02]

Strongback is the big truss like thing that attaches to the rocket while it is on the ground, providing electricity oxygen and whatnot so the rocket doesnt have to use its on board stores while it hasn’t lifted off yet

[@theAessaya]

It also provides extra structural support for the rocket while it's on the stand.

[@rosemaryroscrow2506]

Never say 'What was that?' reminded me of Captain Malcom 'Mal' Reynolds from Firefly & Serenity

[@scottjohnson1483]

Remember Jingles, their plan is to bring the Arks back with them to Earth so the shuttle/ship thing is only designed for a one way trip.

[@imjashingyou3461]

I can not belive they would plan that poorly on the hopes and dreams that the A. ARKs are actually there. B. They can get control of them. C. They are Spaceworthy. D. They have enough fuel to reach Earth as that was a huge issue in the first game. And finally E they are capable of getting to Earth as other consumables might be an issue.

[@leeshackelford7517]

@@imjashingyou3461 there is so much wrong with this BS game. When is Wile E Coyote's ACME Services going to make an appearance.

[@JohnWilliamNowak]

Except the spacecraft has a tile thermal control system, suggesting it is meant to survive re-entry.

[@shadowhawk0142]

Come on Jingles, what's with all the worry? If it explodes you are eligible for a full refund of your ticket! 🤣🤣🤣🤣🤣

[@wstavis3135]

Faith is knowing that every part on that rocket was built by the lowest bidder and getting on anyway..

[@FaithFalkner]

Max Q is maximum aerodynamic pressure, or the state where the vehicle is under the most force from the external atmospheric environment due to the combination of speed and air pressure. You're right about the thrusters at least in terms of chemical rockets. The pipes around the thruster nozzles are regenerative cooling, and contain pre-burn propellant that is being looped around the nozzle to carry away the skin's material heat. This sounds crazy, but you should remember the fuel and oxidizer are cryogenic and in an excellent state for this. Carrying extra cooling fluid means increased dry mass and less overall vehicle performance, which you can't spare in space. So no, it shouldn't be repairable on EVA.

[@wargamingsupernoob]

I'm a day late for the video, but I'm glad to see Jingles at 653k subs. Also I'm glad to see Jingles is taking the piss out of the stupid repairs.

[@jefftheriault5522]

Yes, the ability to suspend disbelief disappeared at first sight of the damage to the thruster.

[@TheFlyWahine]

That depends on the fuel, solid fuel is ether on or its off. If its on its full on untill its burnt all its fuel and there's no turning solid fuel off ones its on.

[@TonyBongo869]

“Sitting on top of a bomb, made from one million parts, each one supplied by the lowest bidder”, quote from an astronaut

[@clamum9648]

The cutting on the thruster reminds me of Hardspace: Shipbreaker. Great game

[@Shatterwings060]

"I believe" is not the words anyone wants to heard right before the launch.

[@bearcatracing007]

I watched the first series again and hope we get to hear 'over and out' again 😅😅

[@quoniam426]

Max Q is the maximum dynamic pressure that will affect the space craft on ascend, mostly going through Mach 1. Liquid fuel engine can throttle to some degree. It's the solid fuel boosters that can't throttle, actively. There can be some "programed throttling" by the shape of the solid fuel itself in the booster but can't be changed after it's put inside. That resin fuel burns from top to bottom of the booster so the resin is generally thinner in the section that will burn around Max Q. In the game, from what I see here, despite not being completely automatic for obvious reasons, the launch sequence seems to be rather realistic even if simplified. I've heard bad criticism about this game compared to the first one but it looks as if the game could have been worth it just for that one launch sequence... Zephyr is also the name of a French made smallsat launcher that will enter service in the next few years. The pipe around the thruster nozzle is from the fuel that runs into the nozzle structure itself BEFORE going to the combustion, it cools down the nozzle so it doesn't melt under the heat of the exhaust plume. The nozzle is made of very small pipes that runs the not yet heated fuel to do that. If the nozzle is pierced like it is in the game, the engine is bust, there is NO WAY you can repair it unless you bring that engine back into the workshop... You can't do it in space. The ship seems to be very small given the amount of crew space in it, so yeah, the propulsion must be fusion based or at least with some more efficient tech. Fuel cells would be closer to actual fuel tanks than the engines, for obvious reasons. (didn't prevent Apollo 13 to go haywire though...)

[@57thorns]

22:00 If a piece of debris that size hit at orbital relative velocities, would there be anything left of the ship except an expanding cloud of gaseous matter?

[@gurk_the_magnificent9008]

The inestimable Scott Manley has some amazing videos on the Saturn V and Space Shuttle engines and their launch sequences. Based on the location it’s either an exhaust pipe or an important part of the cooling system

[@rcrawford42]

Not just cooling -- the fuel is what's used to cool the bell, before the fuel heads into the engine for ignition.

[@gbixby3453]

The pipe on the side of the nozzle is for regenerative cooling... literally it is a fuel line that sends fuel through pipes lining the nozzle to cool the nozzle and preheat the fuel. You are correct, standard operating procedure would be to disable a damaged engine. Normal contingency ops would be to burn with 1 less engine for a longer time... which would only have a small difference in arrival time in the end.

[@petiertje]

My new favorite series from my favorite KZbin video-content-gameplay-thingamajigs-maker.

[@leeshackelford7517]

Guess you like mindless drivel. This has so much wrong with it.

[@RampantFirefly]

Fuel cells aren’t fuel tanks. Fuel cells mix hydrogen and oxygen to generate electricity for the ship. They also create water as a byproduct.

[@Capitainetim]

Yeay! We are on Mars... with no return ticket back home... Yeay...^^

[@tomriley5790]

It's interesting, Apollo 13 had a failure of one of its engines. The important thing in firing the engines is the change in momentum, that can be achieved by more force (more engines) or more time - run the engines you've got longer which is what they did with Apollo 13 (prior to the accident). It would then make sense to cut any loose bits of damaged thruster away.

[@wierdalien1]

Yeah the central J2 pogod

[@Roboticus_Prime_RC]

*Massive explosion Jingles: I didn't do it!

[@Phootaba]

I belive the pipe you cut away is the driving gas or exhaust for the fuel pump. However the smaller things running around the nozzle is the fuel lines used for refrigiation before being used as fuel. 😜

[@TheMouseMasterYT]

So, is Mass Effect's Ashely aware that all of these guys stole her suit design?

[@Grygus_Triss]

The cockpit at the bottom of the ocean was there looooong before Rolf went to the moon. I don’t think it the same one… Once again, Jingles is getting the timeline messed up. He should have replayed the first game before playing this one.

[@Kar4ever3]

In this episode of Deliver Us Mars. Jingles fawn over the fan service.

[@Grazysworld]

Same for you sir, have a great weekend

[@02091992able]

It takes about 9 months to reach Mars. Jingles cutting things gives me flashbacks to Hardspace Shipbreaker while I was cutting, I ended up nicking a fuel line which causes an explosion and put the vessel's class two nuclear reactor into meltdown. I didn't have a clear way to get the reactor out and I had to evacuate and watch it explode.

[@Penfolduk001]

Oh Jingles... Solid Rocket Boosters are either all on or all off. You jettisoned those with the first stage. Liquid fuel engines on the later stages can be throttled up and down. Think you should do Kerbal Space Programme 2 next... 😁

[@imjashingyou3461]

They have throttlable solid fuel rockets now. You don't have fine control over them at all. But they do exist.

[@slayer90220]

Just started watching Jin Roh I forgot all about it until your Q&A

[@lesath7883]

20:25 Yes. That's it! Kathy is such a brat. Talking back to her co like that should have been an automatic no-go for her to be in the mission.

[@matebalazs1575]

It's almost like the Serenity re-entry scene: "Oh God, oh God, we're all gonna die!" 😁

[@RampantFirefly]

The pipes that wrap around the engine bells move the liquid fuel around the nozzle as a refrigeration method of keeping the nozzle from melting. Usually also helps warm the fuel up. So yeah, less than ideal cutting through them. Worth noting though that they likely never used that thruster. Once you’re in space you don’t need much thrust to move around. It’s possible that they only planned to use it to capture Mars orbit once they arrived.

[@atigerclaw]

Eh... Cutting through them isn't a problem. It's a pipe of fuel, not fuel and lox at the same time. It can't ignite. No, the problem is that you just removed a section of the thruster's fuel pipe. Kinda' need that bit to, you know, start the thruster.

[@RampantFirefly]

@@atigerclaw yeah that’s what I’m saying. If you give the game the benefit of the doubt you can assume they’d planned to just not use that engine, but when they got to Mars it was now a liability.

[@atigerclaw]

@@RampantFirefly From the things I saw in just the launch sequence alone... I am going to very quickly start sounding like Jingles narrating 'A Game of Throws' meets 'Communist Revolutionary Simulator Six'. I don't think this game will be earning benefits, let alone of The Doubt.

[@GigAnonymous]

@@atigerclaw Cutting a LOX pipe would be absolutely catastrophic. Pretty much everything with carbon can burn when bathed in cryogenic oxidizer...and the laser is a wonderful ignition source.

[@thomas.02]

I’m assuming they based their engine design off the F1 on the Saturn V. In that case, the big pipe they cut off is the turbine exhaust manifold, which pipes the exhaust gases from the turbopumps running the engines to the inner walls of the nozzle (because for the nozzle to not melt, hot exhaust gas is still more friendly than very hot combustion chamber gas). By that, they will still have serious problems with 1) the turbopump exhaust pushing the ship in an unwanted direction and 2) turbulent flow of combustion chamber exhaust around the holes that the debris created in the engine nozzle. I’m guessing the second factor is what caused the nozzle to finally crack during the crew’s arrival at Mars.

[@mgrzx3367]

Your laugh is infectious . What is the disease I have now. Jingles giggles? Thank you.🤣

[@brucewoodcock8436]

I feel jingles missed the perfect chance for an Armageddon quote about a million moving parts all built by the lowest bidder

[@agerothn]

Just watching this clip made me remember a recent news article describing a new type of nuclear concept engine that's been proposed. Dunno exactly how it works, but in theory, it could enable us to reach Mars within 45 days, rather than 6-9 months.

[@thomasbernecky2078]

We need that Jingles Bingo card? At 30:00 just re-use Jingles Subnautica Bingo Card.

[@I-KNIGHT-OF-YOUTUBE-I]

Damn you for these cliff-hangers I need happier endings.

[@jerryvanderwier2310]

That view at 2:54 is pretty close to reality when coming up to one of the launching platforms at Cape Canaveral, FL USA. Though you probably have to pick the one or two perfect days out of the year when the sunrise is directly in line with the right road and to have the sun rise directly behind a launch pad. The only unrealistic thing is the palm trees and other vegetation, which wont look much anything like this - at least not in Florida. Also, while very unrealistic, I love the Subnautica like windowed Command Module. They even have the space debris.

[@imjashingyou3461]

The bent trees only occur under extreme sustained winds, when a tree was planted at a force non veritical angle like in a bag, or most commonly when growing on a sloped surface like a hill or a mountain and the surface naturally "slumps" or slides down hill do to gravity. As the surface slide the tree twists to get verticle over time. Basically all the tree looking like that would never happen ever on Merrit Island.

[@sanjurohanamizuki6181]

sits in the systems engineer seat of a rocket readying for launch " wait , I have to do stuff ? " lmao .... don't ever change Jingles

[@kevinhadley3779]

Okay, so--it's totally ridiculous to see space-station components impaling the engine bell in a survivable manner. First, it's wildly improbable that debris from the first game would happen to show up here in the first place. As Jingles (and Douglas Adams) noted--space is big. Being 'lucky' enough to catch an identifiable meter-long bit of girder beggars belief. Second, if such debris *did* find our ship's engine bell, there's no way that there would be anything left to examine. Jingles can draw on his knowledge of tanks (World Of and otherwise) and consider what happens when an AP shell with a muzzle velocity of a kilometer per second hits armour plate. You definitely don't find the shell mostly intact, stuck halfway through the side of the enemy tank. Orbital speeds are in the several-kilometers-per-second range; finding debris with a relative velocity of only tens of meters per second - sufficient to impale but not destroy - would be yet another wild improbability. All that said, just losing one of the engines...wouldn't have to be a problem (depending on how the ship is going to be used later on.) The ship is already in orbit; it's not going to fall back to Earth; you're not fighting 'weight'. So just burn 50% longer on the other two engines to give you the same delta-V. (Assuming they gimbal far enough to still give you thrust through the vessel's center of mass.) Cut away the debris and seal the plumbing so that nothing damages the remaining engines, but otherwise you're good to go. (Edit: And, of course, I commented too soon. Jingles did mention the possibility of using just two thrusters moments after I unpaused....)

[@BogenArmbrustUndKonsorten]

Oh how I wish you had said while preparing for Liftoff:" ...it`s not difficult - I mean, it`s not Rocket Sience..." =)

[@Eccles116]

I'd guess the lake where you go swimming is some kind of dump zone for jettisoned stages and deorbited craft.

[@Peter-bakker]

the lightning in this game is really amazing

[@Penfolduk001]

Of course with current airlock technology Kathy would probably suffocate before they repressurised the airlock.

[@7thsealord888]

The line from 'Armageddon' springs readily to m\mind, "You realize we are sitting on top of something with over a thousand tons of explosives, two million moving parts and a nuclear weapon - all built by the lowest bidder ....."

[@mobeus5019]

Max Q = Maximum Dynamic Pressure. Basically between velocity and atmospheric density when the rocket feels the most strain.

[@jackee-is-silent2938]

Ground Control to Major Jingles. Sorry we couldn't spring for an automatic sequencer like every rocket since the V-2...err, A-4, yeah, A-4...had. You're the automatic sequencer. What do you mean, that wasn't part of the training? :)

[@JohnWilliamNowak]

Yeah, but on the other hand astronauts are stuffed into their capsules a few hours before launch, and they're presumably doing something in that time.

[@magecraft2]

Lets just hope Jingles does not get to fly it down :) imagine a Jingles landing on Mars !!!

[@leeshackelford7517]

Hahaha...watching some of his landings and such in Elite....hahaha

[@CathyInBlue]

Reaction Control Systems do not control your reaction to situations.

[@leeshackelford7517]

Hahahaha....sure not controlling my reaction to this cringe-worthy drivel

[@basebilljr07]

Max Q is the stage at which The atmosphere is thick enough and the rocket is going fast enough to cause the most arrow dynamic forces on the rocket. After Max Q the atmosphere starts getting significantly thinner so the forces on the rocket start decreasing Even though your speed is still going faster and faster

[@Spinikar]

Rockets have throttle controls, its just not a lever. Flight Computers take care of launch, astronauts are just along for the ride. You would never leave it up to a human during launch to do this much work.

[@MrDanster35]

so, from what I've learned so far, thruster geometry is usually defined by the ratio between chamber pressure and ambient design exit pressure (to avoid over or under expansion in the flow). I need to look into how it works with an ambient pressure of zero, I wonder how that affects the flow.

[@alexandermold8586]

Solid fuel rocket have one of two states, off or Yeet. Liquid fuel rockets have thrust control.

[@wolfbyte3171]

From the sounds of it, Zepher-III's first stage was solid rocket fuel, like the SRBs (Solid Rocket Boosters) on the Space Shuttle. Once you light them, you're committed and they can't be turned off. Liquid-fueled rocket engines, though, can be throttled and powered on and off. That's how SpaceX can land their rocket boosters. Fun fact: the Space Shuttle Main Engines were actually capable of 105% thrust (they were slightly over designed), but throttled down to 73% power when passing through Max-Q. The same type of engine is currently used on the Space Launch System, the giant honkin rocket for the Artemis program which, hopefully, will deliver us the Moon in this decade (or the next)

[@masterdynamo6457]

Mm, your description of LF engines isn't *wrong*, but it does contain some significant inaccuracies. The only universally true statement you made about LF rockets is that they can be willingly turned off at a time other than fuel burnout. However, the vast majority of LF rocket engines cannot be throttled, and many also cannot be reignited. One of the major advancements that made the Lunar Module possible was the development of a deep-throttling rocket motor to control the descent precisely. This engine is one of only a few rocket motors with this capability. Furthermore, most liquid-fuel rocket motors are started with an external igntion system. On the old Soyuz, it's literally a giant wooden match that they stick under the core. The Shuttle's SSMEs are ignited using spark generators known as sparklers, mounted to the launch pad. Same idea as Soyuz's match, but different execution. For obvious reasons of "these engines don't contain any ignition hardware", they cannot be restarted after being shut down unless an external sparkler is once again present. The number of rocket engines that can be shut off and restarted indefinitely is very low, pretty much limited only to hypergolics (which includes ACS thrusters).

[@SecretRaginMan]

@@masterdynamo6457 That's . . . wrong? Many liquid fueled engines can throttle. It's kind of inherent to the design; open valves to allow propellant in, open valves a bit less to allow less propellant in. Boom! Throttling. The question is how deeply they can throttle before incurring combustion instability. Those that can go below a certain threshold have "deep throttle" capability, which is rare, while most remain at a much higher percentage. The word "most" requires a source. Many engines possess relight capability so that they can perform multiple maneuvers. Engines that use hypergolics don't need a starter in the first place. Moreover, the RS-25s (SSME) are not ignited by the sparklers under the rocket; THOSE ARE FOR BURNING OFF EXCESS HYDROGEN TO PREVENT AND EXPLOSION. An "augmented spark igniter" inside the combustion chamber sets off ignition.

[@masterdynamo6457]

@@SecretRaginMan Most rocket engines used in launch vehicles are made to fire only once, and the majority of these are designed and optimized to run only at full thrust. Don't believe me? Model 39, the first rocket engine to go to space: unthrottleable. RD-108 family, the longest-lived rocket engine ever built, constantly upgraded for 50 years: effectively not throttleable, ground-lit. Rocketdyne F-1, J-2 of Apollo fame: marginal throttling if any. In general, ascent motors, especially historic ones, don't have any notable throttling capability. If they can be throttled safely, that range is so narrow that it isn't worth considering. I would consider a motor that can "throttle down " to 97% an unthrottleable engine, as that is well within the variability of a motor's thrust due to quality control. I'm aware that there are many types of liquid fuelled engines that are designed to deliberately vary their thrust output in accordance with an ascent or descent program. However, there are many more which are designed such that operating below maximum thrust will result very quickly in combustion instability. The only engines -- the _only_ engines -- that have a relight capability are those intended for orbital manoeuvres, or intended to perform a coast phase, which, sorry, is not the majority of rocket motors, especially if we include legacy hardware. I am including small ACS thrusters under the same umbrella here, because they are all similar designs. In truth, most hypergolics have a quite similar overall design, with the differences mainly pertaining to adapting the same concept to different scales. Adding a relight system to a motor that should only ever fire once in the ascent profile is just adding unnecessary weight and complexity to an already incredibly complex piece of machinery. Or trading off performance in terms of having to choose a different fuel. Thus, engineers don't include one when they don't have to. Nor should they. I stand corrected on the RS-25, however. That was a mistake on my part.

[@SecretRaginMan]

@@masterdynamo6457 Hm. So very wrong still. You are moving goalposts. You said "the vast majority of liquid fueled engines" not "the first" or "ascent motors". Which means that you are indeed quite wrong. RD-107/108 family, sure. Workhorse engine of the Soyuz stages. But what about RD-180? Used on the Atlas family of vehicles included the Atlas V. Derived from the RD-170 used on Energia. What about the RS-68 on the Delta IV? Or the RS-25 on the Shuttle? Or the NK-33, first used on Soviet N1 moon rocket, later redesignated as AJ26 and used on Antares? Or the LE-7 used for the Japanese H-II rocket? > The only engines -- the only engines -- that have a relight capability are those intended for orbital manoeuvres, Absolutely false! Falcon 9 uses Merlin 1D engines which relight for more than just "orbital maneuvers". SpaceX lands their rockets, you know? Moreover, we have the Raptor engines for Starship, the BE-3 currently used on New Shepard, the BE-4 which will be used on both New Glenn and Vulcan Centaur. The Archimedes engines Rocket Lab's Neutron rocket. Basically, your statement is only true if you ignore over 150 past launches from SpaceX and don't look at what is being developed right now. Go on. Move the goalposts again. I know you want to.

[@masterdynamo6457]

@@SecretRaginMan If you actually read what I posted, you'd see that what I actually said: > are those intended for orbital manoeuvres, _or intended to perform a coast phase_ The time between Falcon 9 MECO and the landing suicide burn is a coast phase whether you like it or not. Same with Starship. I read your posts fully. I ask that you do the same before you decide to refute them on the basis of failure of reading comprehension. NK-33 is one engine design, which was a variant of the NK-15 which could not relight. As an interesting aside, the throttling of the NK-33 was used only as a rather innovative form of thrust vectoring on the N-1. At max Q, they simply shut down some of the centrally-mounted engines at max Q. The existence of the relight capability was, as far as I know, purely to reignite those engines after max Q. Of course, N1 never got that far. RS-25 cannot relight. I will concede that I have generally lumped in engines that could not deep-throttle as "unthrottleable". Which is an error, largely of terminology, but not of understanding. Of course you can turn down the thrust using a valve (actually, two valves). There you go. You win that point. Please stop being so aggressive about it. However, "many engines have relight capability" is a compatible statement with "most engines don't". If I ignore SpaceX and current development, that still leaves the vast majority of all rocket motors that were ever designed. I did not move the goalposts. Like it or not, most of the hardware that has been launched is legacy hardware. So, in fact, I can ignore those launches and still be comfortably correct. Good day.

[@justandy333]

forgive my juvenile sense of humour but when he mention about the attutude of the thrusters. I couldnt help myself I thinking the thrusters are controlled by a teenager who you couldnt reason with 🤣🤣🤣

[@Chasedtuna9]

"Oh this is good, also very noisy." Well an orbital rocket launch is one of the loudest manmade sounds on the planet, so yea, it is a bit noisy...

[@Lucian00311]

Throttle? An a solid fuel engine? Aren't those, like, running at full throttle the moment you ignite them?

[@SecretRaginMan]

Yes, and you are only supposed to light them once all liquid engines are ignited and throttled. Why? Because once the solids are on you are going whether you're ready or not. Can't abort until those burn out while you're tens of kilometers in the atmosphere.

[@JohnWilliamNowak]

Yes. Perhaps they mean a hybrid rocket, which uses solid propellant and a liquid oxidizer which can be throttled.

[@lucashenry6281]

The craft doesn’t need to make it back to Earth. The mission is to send the Arks back.

[@donaldwrightson]

I really like these videos! More,please!!!!

[@leeshackelford7517]

I vaguely recall lots of arguing, disobeying orders and other scheming stuff in the original Lost in Spàce

[@redbear6]

Need to remember what John Glenn said about riding the Atlas rocket. “I felt exactly how you would feel if you were getting ready to launch and knew you were sitting on top of two million parts - all built by the lowest bidder on a government contract.”

[@BaracchiL]

By the way Jingles I believe that a bus is STILL the way they bring the astronauts to the rocket :D

[@SirAdrian87]

04:41 those are the deadest most soulless eyes I have ever seen in a videogame and yes I am including TES Oblivion and Fallout 3-4.

[@GoSlash27]

You should check out Stranded Deep. Neebs Gaming did a hilarious playthrough where they comment on the dead soulless eyes multiple times.

[@SirAdrian87]

@@GoSlash27 I'll look into it. thanks.

[@blu___1612]

i like there pleasant choices

[@TheMrpresident911]

After hearing Jingles talk about rockets, does anyone else want to see him play Kerbal Space Program?? Yeah, me too!

[@matheusGMN]

damn next episode we're already getting to Mars? can't wait for it!

[@maineguide6975]

Thank you for a Ionger video!

[@Finly052]

Hmm.... I smell a Jingles landing next video. Thank you and take care. 🙂👍

[@jwrockets]

spoilers...

[@Sf_Mason]

RCS = Reaction control system.

[@CallioNyx]

While I get what you're saying about the thruster, Jingles, I also think there's a big difference between a thruster built for liftoff and one for 'cruise speed' to Mars. You're doing less than 1G acceleration with a couple of tons, rather than 4.5G *AND* fighting the earth's gravity to lift 3000 tons. There's a pretty big difference there.

[@StephenCole1916]

"Space," [the Hitchhiker's Guide] says, "is big. Really big. You just won't believe how vastly hugely mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space. - Douglas Adams

[@Bartholomeow141]

you also never want to hear a pilot say "uh-oh"

[@ERAUsnow]

Solid fuel rockets: zero throttle control. Either burning or not. Liquid fuel rockets: throttle control. Also, stage separations are automated, so...

[@deterrumeversor8680]

Fun fact.... the rocket motors and bell shaped exhaust nozzles used today are with almost no change the same exact design that Werner von Braun used 80 years ago.... Think Ford Model T with seatbelts and antilock brakes...LOL...

[@mikistenbeck6517]

"i believe" and "build probably" is not words that should go with a Space Wessel, o.o

[@MrEifer]

I'd assume the only reason they have 3 thrusters is for backup purposes. I'd think it would be able to perform at average speeds or whatever with just one.

[@v.skeggjoar7307]

Damn jingles you sound more and more like Quickybaby everytime I stop in and listen to your playing.

[@rasmuskarapuu7803]

Oh jingles watch out what u wish for, because i have finished the game and u are defenetly going to have to do much more stuff as you go along :)

[@tba113]

Yeah, random holes punched into a rocket nozzle is a mission kill right there. It turns out rocket science is _kind of_ complicated, and not something you can really field-repair with a cutting torch. If the ship hadn't seemingly been designed for atmospheric reentry, it would probably have been better if the debris had impacted the crew compartment: the oxygen loss would be a problem, sure, but for the Earth-Mars transit, all they'd really need to do is patch the hole with something that can stand a single atmosphere of pressure. The breach in the heat shield's integrity would make reentry to Earth instantly deadly, but for the interplanetary trip, anything that can stand a bit less than 15 psi would do the job just fine.