Why have SpaceX, Boeing & Blue Origin ditched abort towers?

[@Awol991]

Rocket Science: Pointy end up. Flamey end down.

[@cloverdove]

If not, you will not go to space today.

[@HiThere-lt9qu]

1:31

[@malte1984]

But which way is... down?... (Vsauce music starts)

[@KingBobXVI]

@@malte1984 - The enemy's gate is down

[@northlandgaming7913]

Clonos ah, that must be where my father went

[@HPD1171]

4:20 this is such a kerbal solution. "well does it get the capsule away from the boom?" "er yes... but.." "then so what if it wobbles a bit"

[@InventorZahran]

*Laughs in quick-save*

[@docnathan3959]

InventorZahran 327 Me, an intellectual: *Revert Flight*

[@zerg9523]

Eclipse538 - as a curious question, what training can one do in order to resist more g’s?.... back in i think the 60s a guy took 50gs on a rocket sled... he lived.

[@jacko4932]

nice

[@zokonjazokonja]

What if it turn over and speed up to ground?

[@icbmrick6514]

Him: “15 g’s” Ksp players: “you gotta bump those numbers up, those are rookie numbers”

[@marrakesh_3589]

I've hit 100 gs before

[@ms.fish1238]

Trash Beats Only what the hell happen for things to go sooo wrong

[@marrakesh_3589]

@@ms.fish1238 umm flip outs and like 1000 boosters

[@fronker7581]

Someone made a rocket that reached orbit that took less than a minute

[@stupidgenius42]

I’ve gotten 200 g’s before (with help from the kraken)

[@CreamyYT]

Tim Dott 2019: The Crew Capsule will never been reflown for Crew SpaceX 2021: Uses for Crew 2 the same Capsule as for Demo 2

[@kermit5948]

True for crew 2

[@samageetdutta9781]

Yeah, I was going to say the same, actually, back those days, info on Dragon wasn't as much guaranteed as we have today

[@SkyHigh_xx]

Crew 1 and Inspiration4

[@zachjester3903]

Meanwhile Starliner never gets reused since it never gets used in the first place

[@cosmicwarrior1]

This is what spacex was saying at this time

[@zoeycch]

I bet that Orion Attitude Control Unit was tested by someone sitting there like with KSP just pressing WASD

[@nonilo1]

oh yeah I guess

[@nonilo1]

I play kerbal space program

[@MrGeforcerFX]

i wan to say it a copy of the pc-3 missile stearing system.

[@Schoolship.]

reminds me of using the xbox 360 controllers in the submarines

[@arneladubinovic9278]

O yeeeeeah

[@Sphere723]

Just use the "Revert Flight" button.

[@plant5875]

yeah

[@iciclefox9901]

Quicksave

[@sigmar4251]

Ikr smh...

[@Fred_the_1996]

But if you go to the ksc and back to the ship you can't revert anymore :(

[@Gabriel-yd4bq]

Just quicksave begor and then load if something goes wrong.

[@arun3151997]

"pointy end up flamey end down" I want that on a shirt

[@ilyapopov823]

Looks like a reference to "Up goer five" XKCD: "Lots of fire comes out here. This end should point toward the ground if you want to go to space. If it starts pointing toward space, you are having a bad problem and you will not go to space today."

[@shatterpointgames]

I want "I want that on a shirt" on a shirt

[@whitslack]

Personally I wish he'd stop saying that. It makes my skin crawl. It's not funny; it's condescending. It detracts from an exposition that otherwise respects the viewer's intelligence.

[@Diggnuts]

Matt Whitlock.. Awwww.. How cute you are!

[@brianofphobos8862]

@@whitslack No. It's funny.

[@eatham2261]

My reasoning would just be, “An abort tower doesn’t look as cool”

[@lucasstevens5337]

Yes

[@disrespecc9678]

My reasoning would be: I like drinks more than food (Liquid = drinks) (Solid = Food)

[@ethanthegamer2020]

Elon musk would say that

[@mister_damian]

thats always the reason, heh

[@gasparemaggio4511]

Hi. I happen to be the person that did the analysis and gave Elon the presentation that recommended what I called at the time “the integrated side-mounted engines” and you are right - one of the reasons was that Elon thought this made the capsule look Super cool! Congrats! The fact that it eliminated the need for a dedicated propellant system as well as allowed for full ascent trajectory abort coverage were also major factors :)

[@trippydrew8492]

Man am I on a massive space video binge. The past few days have really re-ignited my interest in space. thank you for playing a part in that bro!!

[@alekseishuvalov111]

I' surprised, that talking about "abort towers" your never mentioned Soyuz T-10/1. That time when abort tower actually saved lives.

[@char2c584]

@Mino St.Lucas also the Recent Soyuz Flight M-10 i think

[@Fred_the_1996]

@@char2c584 ms10

[@tiberiusmagnificuscaeser4929]

The Soviet/Russian space program has a good history with launch escape systems.

[@augustineeronde3076]

Yeah

[@glasslinger]

Caeser: Of NEEDING escape systems?

[@RockinRobbins13]

You aren't the first to report on this issue, but you are the best, most balanced, most thoughtful treatment. Looking forward to details of the SpaceX anomaly. Don't do it fast, do it WELL!

[@ITTechHead]

"Anomaly", you mean the explosion and destruction of the Crew Dragon Capsule.

[@RockinRobbins13]

@@ITTechHead a-NOM-a-lee: Explosion and destruction of Crew Dragon Capsule. Webster's Dictionary! That would about cut it. lol It was also the word used to mean "explosion and complete destruction" (RUD) of the Challenger Space Shuttle, by the way. "Obviously, we have a serious anomaly." The word has a long and historic usefulness.

[@michaelwoodhams7866]

There's a time to do it fast, and a time to do it well. Grasshopper blew up, and that was OK, because it was a time to do it fast. (Reminder: Grasshopper was SpaceX's test vehicle doing small hops to practice propulsive landings.) The DM-1 Dragon 2 capsule was a time to do it well, so that blowing up is a much bigger deal. (Best case is it was a fault with the testing apparatus, but even that will cause months of delay while they really really convince themselves that that was all there was to it.)

[@PHeMoX]

@@RockinRobbins13 Lol, but you have no idea how big of a deal these issues are if you think 'anomaly' covers what happened. SpaceX may not be in trouble in terms of shutting down, but you can bet this is going to cause a lengthy delay for manned missions. I doubt these are the risks NASA / SpaceX would want to bet actually human lives on.

[@RockinRobbins13]

@@PHeMoX The jury is still out and you're trying to explain the verdict. How about we wait for facts before deciding what's likely to happen? I gave two examples of consequential failures that did not result in long delays: Apollo 6 and the aborted Soyuz mission. Both were as spectacular as this one and men were on board then. We can't know anything right now. This is when smart people are silent and wait.

[@devindorton6650]

One year later SpaceX just launched our first humans from the us in 9 years

[@benbovard9579]

Such a cool sight to see

[@mikek9352]

very exciting!!

[@GewelReal]

@@kumarsajal8400 no

[@maryamkaita2529]

Russia was chilling those 9 yrs earning money from Soyuz Rip money

[@jacko4932]

orbital*

[@colonelstriker2519]

11:30 now my life is complete. I now know how that anti ballistic missile steers with those plenty of holes on the side. I thought those are mini solid rockets stitched together

[@Nowhereman10]

Some interesting history that you didn't cover here is that the Space Shuttle orbiters were originally supposed to have a LES of their own and that design was kept well up until when the vehicle was to go into production, but like other features it was dropped to save weight, complexity, and most importantly money. The system was referred to as the Abort Solid Rocket Motors or ASRM. It could be described as a pusher-type since it was comprised of twin rockets attached to the sides of the orbiter's aft fuselage and when fired would carry the orbiter away from a malfunctioning stack. The ASRM's weight was initially considered acceptable since when the Shuttle reached a point where it was no longer usable, it could be fired off, the thrust boosting the stack and countering the dead weight, then jettisoned. So what's the big deal? Aside from cost there was another problem that kept rearing its ugly head; an abort scenario where the ASRM was used invoked heavy stresses on the orbiter airframe and so to keep the vehicle from breaking apart due to the aerodynamic load, the frame had to be beefed up structurally to the tune of a whopping 9 metric tons! In addition, this would not save the orbiter or its crew and payload in the advent of an exploding SSME, so its usefulness was limited to failures of the ET or SRBs. Since NASA was under a great deal of pressure to make the Shuttle meet the DoD, CIA, and NRO's payload requirement of 65,000 lbs (29 tons) to LEO, and with costs for the program rising, ASRM was deleted from the design. Skip over two decades later and the design of the HL-20 lifting body that was the inspiration for SNC's Dream Chaser was also going to use a pusher type abort system. However this was a separate system not directly integrated into the craft and was a part of the cone-shaped launch vehicle adapter. The crewed variant of Dream Chaser, HL-20's successor, uses an integrated pusher system that also doubles as the orbital maneuvering system. Cargo Dream Chaser could in theory use this, but being stuck under a fairing makes its use impossible.

[@squirlmy]

you should make your own video! Just read that out loud.

[@capridream]

Cool stuff, unfortunately many people commenting here have no basic knowledge to understand what they see and hear...

[@alexiscannon9618]

how am i just now realising the two different colored eyes

[@themonolithian]

I would be super proud of having two different colors

[@jaco5five6six]

Because it isn't something to really "FOCUS" on

[@709mash]

Oh good, it's just different colours. I'm watching on my phone and thought he had a stroke and was super dilated in just one eye. Phew lol.

[@Waffen-id9gn]

Shiny Pokemon

[@MrGrandure]

@@709mash I thought the same thing. Lol

[@crazed357]

Watches a rocket video on KZbin: “Abort capsules...liquid cooled abort ejection... feels like being hit by a semi truck for a continuous 15 seconds...” Gf: “What the f### are you watching?!”

[@Megalomaniakaal]

"Oh, just researching ways to escape..."

[@BleakVision]

Lol women are not even ashamed of their ignorance

[@TheInterestingInformer]

BleakVision a lot are pretty fricking smart tho

[@aqimjulayhi8798]

Being single for so long, it took me awhile to understand the joke.

[@gatsingtv8671]

i feel you bro even i have no gf for so so long im pathetic!!

[@HylanderSB]

How to create an evergreen video? Refer to an event that took place a week ago as being in '2019'.

[@SolarWebsite]

I'm sure that was deliberate, and actually very smart.

[@sakadabara]

Do you mean the Sri Lanka bomb blasts ?

[@DoakyDoaky]

@@SolarWebsite I assume he is future proofing the video

[@xeigen2]

@@DoakyDoaky Yeah, that's what evergreen means... Always seeming fresh, without references that date the video.

[@shatterpointgames]

@@xeigen2 lol thank you idk why no one replying seems to understand what the original comment meant

[@handlebarfox2366]

4:20 *watching that thing spin and imagining the amount of vomit flying around the cabin*

[@dave8191]

Not the cabin, inside their helmet... Then long wait to be recovered...

[@rickmanley9650]

Imagine how full their Depends would be too!

[@scottwillis5434]

I'll bet some of you would pay money to take that ride in an amusement park. Of course, some of us might pay money to *not* take that ride...

[@declan9876]

Imagine drowning in vomit...

[@tedthetreertc1219]

They might be knocked out before they have time to vomit

[@simont3686]

4:00 Does that mean that when it fires you can cook an egg on your table?

[@jakobha3768]

I think it would instantly freez the egg because of the rapid decompression.

[@yert5679]

If you can even hold down the egg in space.

[@sorenchristensen2149]

I’m guessing it would be insulated so people wouldn’t burn themselves but... that would be cool

[@FrVitoBe]

comes with fancy dining in space, teppanyaki any 1?

[@xxoan.1613]

@@yert5679 i bet 15 Gs can hold down an egg

[@lymancopps5957]

SpaceX should keep developing propulsive landing. It will pay big reusability dividends eventually.

[@zach1023]

That’s their plan, actually. They want to land starship propulsively, so they’ve been training to do that via F9 and FH launches.

[@Kaffe23]

Or just use SSTOs theyre way cheaper and theyre reusable

[@nicholasharvey4393]

FBI SSTO as in "rocket that has only one stage", or SSTO as in "spaceplane"?

[@thinfourth]

If the propulsion system goes tits up then you have a really big splat instead of your astronauts So you need to fit a parachute back-up in which case Why not just use the parachutes in the first place?

[@kenleyokamoto4577]

@@thinfourth More options.

[@georgelewisray]

PROPULSIVE LANDING by SpaceX: My guess is that P-L is their long term goal and what happens in short run (i.e. parachutes) is just whatever it takes to keep NASA happy without compromising what they believe to be the best ultimate path.

[@HiyuMarten]

There are a couple issues with propulsive landing such a capsule: 1. It's important to have a central centre of mass when the engines are active, but during reentry, the opposite is true - having a controllable, offset centre of mass is required to steer the vehicle during its unpowered descent. 2. Is it worth the development cost? It's clear from some renders and talks that SpaceX intended to scale up Crew Dragon's landing system for use with BFR (later Starship), but when Starship's reentry profile changed to an improved design, developing it for Crew Dragon wouldn't have as much R&D benefit anymore. Development on Starship is now in full swing, so you're right that propulsively landing crew is their goal - it's just that it's shifted to their new vehicle. That said, it's been hinted at by Elon that Crew Dragon is still capable of propulsive landing in the astronomically rare event that all of its parachutes fail.

[@DairyLife]

I'm not sure that NASA (and probably SpaceX's enigneers) are incorrect in being circumspect about Crew Dragon's propulsive landing, since it relies on 8 engines and the landing legs properly operating after being subjected to a full flight regimen. How many of those can fail (and in what configuration)? And is there enough time to deploy backup parachutes if there is a failure? If a skycrane crashes landing a rover on mars because of an engine failure, it's an expensive embarrassment . If a capsule with a full crew crashes because of an engine failure, it's a horrific tragedy.

[@tippyc2]

SpaceX is already developing a different propulsive landing vehicle, Starship. So I doubt at this point Crew Dragon will ever get that feature.

[@dotnet97]

@@DairyLife the issue wasn't with engine reliability, but with the landing legs. NASA wanted additional verification that it'd be safe to have holes in the heat shield for the landing legs to pop out of. SpaceX decided it wasn't worth pursuing because they had determined Dragon to be a dead end anyway, choosing instead to focus on Starship/Superheavy.

[@dongurudebro4579]

Great explanation, great cuts, great paceing- in short great Video! :) You keep getting better and better.

[@mancubwwa]

One tuning he missed: in fact Soyuz Has both tractor and pusher systems. In addition to the tower there are motors mounted on the faring, which are used in case of emergency in later stages of the flight after the tower is ditched. As demonstrated last year.

[@dongurudebro4579]

@@mancubwwa Yeah, he knows that. But its a little thing which he probaply thought wouldnt fit in.

[@orisher5735]

Don Guru de Bro I saw your account 2 times on KZbin today on vitasiams channel

[@Annepanne4ever]

Don Guru de Bro totally agree!

[@timbo-ob6gh]

...The sheep commenting on how the wolf is eating them...that's original man...

[@filmgimix4728]

I think if space x played more KSP then they could get to mars..

[@braeeee_]

U mean Duna?

[@Monarch_Prime]

With rss mods

[@Monarch_Prime]

@@georghe4229 yep

[@Monarch_Prime]

@@braeeee_ duna is technically mars

[@braeeee_]

@@Monarch_Prime I was joking. Because we are on about KSP

[@venkataramanan4622]

I like the falcon heavy in the background

[@LuisRodriguez-rd7hb]

The part about reusability of Crew Dragon did not age well. I watched this just after Crew-9 launch. I heard during the launch webcast about the Super Draco engines now being a redundant option for soft splashdown in case of parachute failure so I went to KZbin to research a bit about the Super Dracos and found this. SpaceX changed their mind on reusability because today's launch is the 15th crewed launch since Demo-2 including Axiom, Inspiration 4 and Polaris Dawn. All of them using the same four Crew Dragon capsules, all of which have been used at least three times.

[@Avida-l7s-instrumental]

Offer : I am willing to go to space without an abort system. My life sucks anyway. And I'm ok with being paid, let's say, 12$/hour.

[@CallMeAshen]

Declined. Sir youve wasted our time to tell us this? You failed nearly every single test both physical and mental. Please leave the building and do not come back.

[@mancubwwa]

Sorry, shuttle not flying anymore...

[@marcoseduardocastro781]

Sorrry,shuttle was retired in 2011

[@gregblastfpv3623]

WIth this Dragon you may make $1 to your family/heirs:).

[@ronschlorff7089]

@@CallMeAshen LOL, LOL, (goes on for about 10 solid minutes). Reminds me of an old TV show, talk show from the 60's (when such were actually watchable). There is an old guy, dying of cancer, but still smoking, while he was interviewed by, Jack Parr I think it was. His name was Oscar Lavant, an actor and great piano player from the musicals movies era. Jack asks him: "Well, Oscar, welcome to the show; how are you doing"? Oscar answers: "Thanks Jack,...well, I can tell you this: I'm very promising astronaut material"! LOL.

[@KOZMOuvBORG]

2:21 15 g's doesn't sound like fun... consider the alternative (here), incineration. And the Space Program is going Kerbal!

[@stevenf1678]

One thing not mentioned in this video is that you can adjust the thrust to minimize g loads on the crew.. If the rocket blows up on launch you probably want high g's to get away fast. But later in flight you don't need high g's. For example if the second stage motor fails to ignite after separation You only need one g to save the crew.

[@AngDavies]

@@stevenf1678 dunno if this is what you meant, but this is only really true of the liquid systems, solid rockets are difficult to throttle reliably

[@NFGprometheus]

Not ideal but also not necessary if solvable

[@Wyld1one]

Please realize the difference between stress vs strain. Football players constantly deal with up to 150g's during tackles. It was a a study during which they were testing why airplane wings wings sheared off during high G turns in simulations. Air force pilots can deal with about 9g's of ''sustained'' force before blacking out. however; you can deal with higher g/s as long as it's for a very short durations. see: www.popularmechanics.com/adventure/sports/a2954/4212171/

[@ronschlorff7089]

@@Wyld1one I think you meant 15 g's not 150 g's. If the latter, I want that guy on my team; put the fear of God in the Q backs from being sacked by that "hit"!! Would not only be season over, but "game over"!! :D

[@MrJonang13]

Because, they can shut down a liquid fuel rocket.

[@amirabudubai2279]

You don't want to shut down an abort system.

[@manicmute9440]

@@amirabudubai2279 - The liquid fuel motors can have other uses instead of just being an abort system.

[@amirabudubai2279]

@@manicmute9440 Yea, that was covered in the video. The biggest advantage, in my option, is being able to use the abort fuel as RCS later. You are not carrying around as much dead weight.

[@Skywalker8562]

You don't really want a parachute descent system that could prematurely deploy while the escape tower is still burning off its fuel setting the parachutes on fire.

[@Shrekfromthehitmovieshrek]

Amir Abudubai can’t you just eject if it was a tower

[@mastershooter64]

12:47 but there are already solid rocket motors on the iss,the soyuz capsule uses solid rocket motors just a second before they touch down

[@attackhelicopter3860]

These emergency thingy are useless... Just revert the flight, right? It works in ksp...

[@Sag05501]

yes, and then it sould work in real life. right?

[@winged]

They play on hard mode. No reverts here.

[@iciclefox9901]

That’s crazy. What are they, rocket scientists?

[@TheInterestingInformer]

I love this comment chain 😂

[@TruthNerds]

@@winged I've always admired astronauts for their bravery, but playing on hard mode is just a bit too crazy IMO.

[@dongurudebro4579]

Glad you asked Tim, i have a question - what caused the SpaceX Crew Dragon capsule "anomaly"? ;-)

[@MrDeath2094]

Come back In a month and we may know the answer. SpaceX and NASA won't know the exact cause yet.

[@dongurudebro4579]

@@MrDeath2094 Thats why i asked now, part of the "joke"! ;-)

[@ZAGAD-i2x]

@@MrDeath2094 Scott Manley said it might be because of a failure in the COPV tanks which might be because of corrosive salt water damaging the tanks

[@km5405]

ah interesting. in any case we will learn a lot about it think. the fact it blew up is not a negative per se .... that's why its a test vehicle.

[@badtrekee4348]

The Ocean landing messed things up I bet. They are still investing what caused the explosion. Noone knows why yet.

[@AthanImmortal]

I love deep dives like this. Great editing, well written script, very clear, you're doing great, Tim!

[@Sean2002FU]

My father was an mechanical engineer. He was responsible for the design of the escape tower on the mercury/ redstone rockets!!.......I know I'm biased, but he was really smart..later he worked on the hose couplings on the space suits for Apollo!

[@circusmime]

Wow

[@Omega0850]

12:36 Polar lights from space Easily one of the most beautiful things i have ever seen!

[@benclarke5914]

extremely well researched, must have taken him ages, this is great youtube content thakyou

[@mitchellbarnow1709]

When I used to watch the Apollo Missions on TV, I couldn't figure out how the astronauts were going to have time to crawl up and get inside of the escape vehicle! I don't recall ever being told that the tower had rockets and was attached to the crew module. How amazing to learn this today! Thank you so much, Tim

[@andrashajdu7846]

where did you buy the Falcon Heavy model that is in the background?

[@carterrissmiller2510]

Buzz Space Models

[@andrashajdu7846]

@@carterrissmiller2510 thanks

[@carterrissmiller2510]

andras hajdu np

[@embain269]

Tim, you killed it, everytime I got ready to ask a question out loud you were already answering it! Nice script!

[@HolyGuacamolean]

I just happened upon a video of yours randomly. After watching a few it's already one of my favorite channels.

[@connormagnuson6361]

Me too

[@grandetaco4416]

I can't imagine the research you have to do to get all of this. Thanks for your work.

[@jjjj_111]

I like the way your voice sounds Everyday Astronaut! It is very clear and easy on the ears, even after long periods!

[@northMOFN]

12:13 Does Soyuz not carry solid rocket motors to the ISS? The solid rocket that fires just before the reentry module hits the ground, letting them get away with an undersized parachute?

[@johndeltondo]

It does. But they are a lot smaller than abort motors, which is why I assume they’re easier to protect against thermal changes, and they’re much safer to have on the ISS. They are also mounted beneath the heat shield, which would make refurbishment of the descent module more expensive.

[@Jrcraft]

@@johndeltondo The nasa Magellan spacecraft used a large Star 48B Solid rocket motor to insert itself into an orbit around Venus. The large solid motor worked just fine even though it was flown through interplanetary space for over a year before firing. I don't think his ideas on solid motors in this video have any basis with regard for them being in space for extended periods.

[@johndeltondo]

@@Jrcraft I doubt he just made that up. You likely wouldn't get those types of thermal cycles on a mission to Venus, yeah?

[@Jrcraft]

@@johndeltondo The Nasa clementine mission carried a Star 37FM Solid motor in LEO for over a week before using it to preform a Trans-lunar transfer injection. It even had it's own little solar panel 😄

[@andersonfor2012]

I'm interested to find out whether SpaceX will use the abort motors as a secret back up to the chutes! I have a feeling that they're going to sneak in a command for it to propulsively land if the chutes dont deploy, two options safer than one?

[@1312_PV]

If they do I hope it can't trigger via software, only via the crew manually enabling it, otherwise it may trigger at unintended times. Also, it is probably not doable since they can probably not propulsively land on water safely enough, and the capsule would be heading towards a water body. Anyways, if they find the extra time, another option is always good to have, even if never tested and very risky.

[@neil7250]

@@1312_PV The F9s can land propulsively on the surface of water. The rocket topples over, obviously, but the touchdown is soft. I think Crew Dragon can do it as well.

[@1312_PV]

@@neil7250 Probably, I was thinking that water vapour hitting the capsule could be bad. I wish that, if the parachutes were to fail, propulsive landing succeeded, but without any testing it isn't all that likely.

[@Hyperus]

​@@1312_PV I dont think vapor would do bad to the Dragon, it should be able to sustain a lot of heat in the first place and it resists water since it lands on it.

[@1312_PV]

@@Hyperus Well, it handles water quite badly, I hope there is no problem as well, don't want to boil the astronauts off.

[@dr-sy1fs]

Im curious, why are the Falcon 9 landing legs not partially deployed to provide a little bit of extra drag on the way down? (would they risk braking apart, or destabilize the rocket, ?).

[@kalleklp7291]

This is one of the most informative videos I've seen about the subject. It's plain and easy to understand without a ton of engineering terms etc.

[@Psi105]

Anyone know if the crew dragon flight computer will attempt a propulsive landing if it detects that the parachute failed to deploy? Or does the new design no longer have the fuel for propulsive landings?

[@brachypelmasmith]

well, if they are landing at sea (splashdown) then there is no land nearby to land on.

[@Psi105]

@@brachypelmasmith ? Not sure why that matters. Propulsivly landing on water is preferable to crashing into it at 200kph

[@brachypelmasmith]

but isn't the whole point of propulsive landing to enable soft landing on land. Because landing in water (propulsve or not) exposes capsule to salty water and damages it. Propulsive landing in water wouldn't fix that. By using parachutes they are coasting the capsule in water, so landing speed is not such a problem, water is. Anything that enters the sea is extremely hard to refurbish for another flight, moreso for human flight.

[@FactoryofRedstone]

I think they will, I mean the effort is rather small to configure the thrusters for that and I think the have like fuel to run theses thrusters a good amount of time. brachypelmasmith, I think you don't get the original question. It was can the flight abort systems original landing capabilities be used to emergency land when the parachutes fail. If that happens, the landing on land or the reusablity of the capsule is irrelevant. The only important thing then is to land the crew save.

[@brachypelmasmith]

in that case, I dont know. I am sad that NASA forbade them to go with that propulsive landing, so m sceptical about them proceeding with implementation of that system with all the hussle with approval/licencing process by NASA. It seems like a waste to design something that you aren't supposed to have or use.

[@williamlewington3223]

Your Knowledge of engineering has definitely improved, I remember in your early videos You were dodging a lot of key terms. But now the Quality and depth of content is good. Keep it up. Keep it Engineeringy. Remember most people watching this type of stuff are probably into science.

[@JohnnyWednesday]

I second this - you know your demographics of course but you've done so much research - so much work - I don't know the exact qualification, but you've earned it :)

[@ddegn]

I'm just glad he dumped the orange suit with a vacuum cleaner hose attached. This was the first video I've watched on this channel for about a year. I watched the whole video and enjoyed it. I couldn't bear watching more than a few seconds of his early stuff.

[@MegaBrokenstar]

Duane Degn that suit is an actual soviet high altitude pressure flightsuit. It’s not fake.

[@ddegn]

@D.O.A. "I love the orange suit" The suit itself is great. It was the combination of the way hoses were left dangling and the way the information was presented in one of his early videos that turned me off. I may well have been too harsh and quick with my judgement.

[@smallerthanlife7664]

0:51 "liquid rocket motors" 😄

[@StreuB1]

Likely your best and most technically accurate video to date. Very well done and very well explained. I am not sure I could find something else to add. Hats off to you. The Dragon anomaly was likely due to a valve sequencing issue or an issue during vent or purge. Thats when NTO rears its ugly head and bites.

[@vrilakbrothers8193]

sir which motor is used for new shepherd pusher system

[@lordtoast2743]

I always forget how huge these things are and when I see people beside them I’m still amazed at the size

[@carterrissmiller2510]

What if the Abort Tower Blows up While Aborting "Houston.... Um.. We Are Screwed"

[@ddegn]

One of many reasons space flight is still very dangerous. Still, I volunteer to test any new capsules myself.

[@carterrissmiller2510]

No kidding Edit: but the crew dragons abort can only blow up if the capsule is destroyed

[@ronschlorff7089]

Towers used solid rocket motor fuel, less chance of explosions with a non-volatile liquid fuel. They pondered that question back in the day cuz that system has to work "first time, every time, all the time",... "Failure", as they used to say in NASA, in the 1960's, "was Not an Option"!

[@simonrano8072]

what if the integrated booster blows up while aborting ?

[@carterrissmiller2510]

Houston We are screwed Again

[@jacksnake2443]

Tim, Dragon 2 uses helium tanks to pressurise the super draco system. The hypergolics are not self-pressurised.

[@halamkajohn]

what was the pressure supposed to be? salt water in the regulator? so baking soda would not have stopped an explosion? vent holes would not help? double the tank thickness? use 500 pounds less?

[@halamkajohn]

the regulators resonated?

[@halamkajohn]

reentry heat damaged the regulators?

[@halamkajohn]

electronic pressure regulator soldered in with pge 24,000 volt soldering iron "?

[@halamkajohn]

8:45 one tank blew up the other tank? tank should blow out the side?

[@NightHawk-kc6it]

*Hey Tim, question about starship. Will it be louder than the Saturn V since it will be more powerful? And what needs to be done to the existing launch pads to support the enormous thrust levels.*

[@tinldw]

IIRC, it's supposed to use brand new launchpads

[@waxmell7]

Tim, if the LAS attitude control for Orion (11:47) has solid propellant at the top, why doesn’t it have the classic smoke signature we see at with other vehicles that utilize solids.

[@Psiberzerker]

The thing is Apollo et al were Disposable. So, it made sense that the LES could be dropped as soon as it wasn't needed, there's no reason to carry that to orbit, and back. Sticking it on the nose, where it can easily be ditched even helped aerodynamically as it broke the sound barrier on launch. Dragon (For example) is re-usable. In fact, the plan was to use the LES as landing rockets after it came back. So, the Abort rockets are also re-usable, and therefore, it makes just as much sense to integrate them into the airframe. So they can come back with the airframe, and be re-used. That's the main reason why the Abort Rocket was on a tower-up front: So they could ditch it, without separating the crew cabin from the support module.

[@Papershields001]

I’ve gotta say, even tho Blue Origin is really technically impressive, watching actual pilots fly Virgin Galactic bird is pretty bitchin’. Way way cooler.

[@Papershields001]

I miss the shuttle so bad. I’ll never understand why we stopped flying the most amazing vehicle in the sky.

[@welyum7308]

@@Papershields001 too unsafe and expensive

[@davemwangi05]

@@Papershields001 shuttle vs BFR?

[@CarlosAM1]

@@Papershields001 What about the fact it was really expensive and killed 14 people on its lifetime. More than any other rocket in history.

[@Papershields001]

Carlos_A_M en.m.wikipedia.org/wiki/Nedelin_catastrophe en.m.wikipedia.org/wiki/Intelsat_708 You are wrong on about 3 different levels.

[@Lecxlez]

That's so cool you uploaded i've been waiting. Love your epic videos so intresting

[@supergrafxengine4620]

I have a question : Are the windows made in transparent aluminium ? What are they made of? Thank you!

[@albinoviper2876]

Diamond glass

[@SunilSingh-lk6hk]

Dear everyday astronaut, at 12:25 minutes, you told that solid fuel is not good because it has to go to ISS along with crew dragon. Actually crew escape system required only till solid motors phase mainly. In-orbit abort can be assisted by Service Module. So in my view until unless retro propulsion is not used, there is no need to carry any type of CES till ISS.

[@edfou5]

BRAVO, TIM. Just a BRILLIANT video! I'm so ancient (67) that I remember the news bulletin announcing that the Soviets had put a man in space. I've been a rabid space junkie since that day, (I know my stuff) but I'll tell you... your video just taught me four things I never knew! Guess I'm not as smart as I thought I was...

[@GiovanniEsposito5]

The video I was waiting for! Thank you for your research, as always you answer all the questions I was asking, and more!

[@kb3116]

You're the absolute BEST! I so look forward to your vids!!! Its my morning coffee background noise. Informative and fun! Thanks!!

[@Jules-z4e]

Definitely in love

[@kb3116]

@@Jules-z4e Me too. This is a great channel..

[@NishantSoniTV]

2:50 Man can you please do a video on China and India's Crew vehicles and the rockets they are gonna be using for their upcoming manned missions to LEO?

[@CookieMonster-nt8hh]

12:30 I get what you're saying about SRBs in space, but the Sojus has the retro rockets for landing on the landing module. they are essentially small SRBs. how do they not run into the same issues?

[@EverydayAstronaut]

Because they’re tucked away inside the command module, and behind a heat shield and not exposed while on station. So their temperature is much more consistent and stable.

[@CookieMonster-nt8hh]

@@EverydayAstronaut Did not think about that. Thanks for the answer. Greetings from Germany!

[@pdubs5899]

Yeah... I'm not a rocker scientist but I feel like Blue Origin needs to add fins on that abort system.

[@jackwhitlock1]

I agree

[@chriskoutounidis7183]

2 years later and the same dragon capsule is about to fly a 3rd time with people on board

[@kermit5948]

Maximum reusability

[@Fjrjrjjjdb9734]

"Never be reused." Endeavour C206 5 reuses:

[@jdclayton868]

When it comes to space subjects, I rather get my information and explanations from you that NASA or any other the space sites I subscribe to. You're, by far, the best researcher and presenter on the subject. Clearly found your passion. Thanks!

[@davemwangi05]

you don't wanna drink from the fire hose?

[@zachb1706]

Why don’t you listen to NASA? They did get us too the moon btw.

[@davemwangi05]

@@zachb1706 Oh, did you get too the moon? I did not get too the moon. I wish I could.

[@zachb1706]

Divad Ignawm unlucky 😐

[@davemwangi05]

@@zachb1706 I feel so honored to talk to an astronaut, you must be Neil Armstrong or Buzz Aldrin.

[@jayestes-nsdistrictvice-ch8590]

great report. I felt like you left out a small detail on some of the modern abort towers that have reverse flow nozzles - putting the full abort solid between the capsule and the nozzle - which eliminate the need for the truss mounts. The orion abort test looks awful, but the skins of that test vehicle were simply painted 1/4in aluminum which barely got scorched,, so the separation makes a massive different in heat flux. One other tidbit - the abort level in that test was 16.2 G's, but it has been "dialed back" to a lower level for production use.

[@trek98597]

First off, I REALLY like your channel!! I was born during the early years of the Apollo missions. You are very well informed, you do your research, and relate easily to any age. I would really enjoy a chat with you, talk about the Apollo era, share my thoughts and experience coming from a military family . On related topic, do you have any links you can recommend for buying some nice Apollo mission models (Easy to put together) to include SPACEX models. My grandson (3rd grade) is very interested in science & space. Thank you for listening.

[@PsychicThursday]

Great video, Tim. I watched this when it came out, and decided to rewatch it having just watched Demo-2 (congrats Bob and Doug). Imagine my shock when I realized I hadn't commented or liked the video. Anyway, very informative video. Hope you're staying safe.

[@fanbutton]

It's all fake...all of it.

[@mr.cliffordjohnson6304]

Good stuff Man, Good stuff, nice video, learned a lot from your video, history, technology, and rocket science.

[@KonstaKokC]

Last October when Soyuz MS-10 accident happened escape tower was already ditched and crew was saved using SRMs built into fairing

[@nicolastattini8801]

8:52 , why is the pressure of the hot gas comming out of the engine changing. We see the hot gas moving, as if the pressure changes... explenation?

[@EverydayAstronaut]

They were practicing throttling the motors individually 👍

[@ThePixelated_kris]

Tim Dodd: very clearly talking about rocket science. KZbin description: oh he’s must be talking about a medical procedure duh.

[@dylanmccallister1888]

What happened to if it works don't fix it? Especially when it concerns a saftey feature. The old version worked. I know the 15G is insane and all, and it isn't reusable but that's a price im willing to pay for the survival of the crew imo. What is more insane is spontaneously combusting because your liquid fuel saftey feature malfunctioned. Or it flipped a 180 in all it's unstability and blasted you back into the explosion you were trying to escape.

[@Gamerboy385]

I'm pretty sure that saying is more about actually physically performing repairs on something that isn't broken. In this video, what's happening is they're making a new variant on an old system to meet changing demands. In this case, the new demand is recyclability, which the old system did not have.

[@dylanmccallister1888]

@@Gamerboy385 A. Dont bring pedantics into a logical argument, any engineer would disagree about when it is appropriate to use that saying. B. I covered the reusability issue, reread what i said.

[@Bane_questionmark]

"that's a price im willing to pay for the survival of the crew imo" I'd agree if there was literally no other option, but why are you opposed to finding a way where we don't *have* to pay that price?

[@susananavarro3452]

The great thing about this is because now I know that the Starliner has an abort system

[@mohamedconteh284]

You seems to have a larger idea about space exploration thank you so much for given us a good news about this happening

[@michiunfried502]

There is another problem with the pulling-type abort systems is that as long as the engines are over the center of gravity, the rocket acts like pendulum whitch acellerates itselfes. That is why at the Apollo-Missions they filled the tower with depleted uranium (very heavy), which shifted the center of gravity towards the top. However, this makes the whole assembly a good amount heavier.

[@testchannelpleaseignore2452]

12:30 What about the solid retro rockets on the soyuz

[@thedarkknight3107]

U mean fairing motors

[@DadbrosGarage]

The integrated abort system is great except using Hydrozine next to the crew is dangerous!

[@ke6gwf]

All other space craft use hydrazine next to the crew. Either as abort fuel for Dragon and Starliner, or as reaction control fuel for the rest.

[@ke6gwf]

@@memefief8527 like I said, all other spacecraft lol Including the ISS and Soyuz. But yes, I guess I did only call out the current 2 projects.

[@kdkd693]

Hydrazine is not uncommonly used outside of rocketry. We used to dilute it to 35% into 200ltr drums for thermal power stations for their water treatment (oxygen scavenger in water feed at ppm level) I used to test it without any protection gear in the lab (when I was a boy just out of Uni). I ain’t dead yet, despite my stupidity ignoring safety procedures around mouth pipetting.. Kids! @Ken

[@eggchucker666]

Are we really going to ignore the fact that this guy has two different colored eyes?

[@Techy93]

I believe it's called heterochromia iridis. google it if you're interested :)

[@scottwillis5434]

Er, yes. OK, so his eyes are different colors. That means what? That we should scream, shout, run in circles, turn purple and explode? What is it that you are wanting?

[@dabs4270]

@@scottwillis5434 yes, that's the only plausible thing we can do after figuring out someone has two different colored eyes

[@Thundarr995]

My dog does. He's got 1 brown eye and one eye that's 1/2 blue and half brown. Alot of people ask me if he's blind in that eye. I usually say idk? You're gonna have to ask him. 😆 I'm pretty sure his vision is just fine.

[@lucachacha71]

4:55 my childish brain thought he was gonna say that the new shepard is trying to look like a dike and an escape tower would have ruined the look

[@famlrnamemssng]

14:26 I will never understand why he thought that because it landed in the ocean it couldn't be reused for crew. Obviously it has been reused for crew, this video is 4 years old

[@robertschultz6922]

Do we know the parameters of the escape systems such as the velocity required to separate the capsule from the booster and what the system start up time requirements for time of anomaly to escape system sequence start up?

[@ruben8133]

I've just realized you have heterochromia. Do you? That's really cool!

[@keirfarnum6811]

Ruben Now I feel boring being homochromic?! Thanks dude! 😉

[@volka2199]

I have central heterochromia, there is also sectoral which I've never seen. For central if your eye color is light the central region directly around pupil usually has a shade of gold/yellow while the rest of the eye is your natural color. I've tried to do research but some say the pigment making that specifc color is melanin while most others say its lipochrome.

[@MsMoonbadger]

I think it is anisocoria

[@smimoma5930]

"Abort to orbit" Sounds badass

[@Kumquat_Lord]

I'm a little disappointed they didn't consider Cavea B, the best high-energy monoprop developed (but never used) for their abort motors.

[@dotnet97]

Cavea B from what little reading I've done is difficult to ignite, and since it hasn't been used before, it'd probably take too much additional research to design and then verify engines for it compared to using already well understood fuels.

[@jmjdeist]

In a pusher style abort scenario (Starliner or Dragon) do the abort engines actually utilize thrust differential to steer? Are the crew module RCS thrusters used at all for additional guidance?

[@rightwingsafetysquad9872]

14:24, why did Boeing decide to land star liner on the big bouncies? And what if it bounces and tips over? Doesn't seem like it'd work if it lands off target on a hillside.

[@alxchunlin5221]

14:28 - except now we are seeing humans in the dragon capsule!!

[@DataSmithy]

There is a lot of work going on to develop less toxic hypergolic fuels.

[@Hoganoutdoors]

lol.."less toxic" but still toxic AF....

[@anthonydomanico8274]

Douglas Smith, yeah doesn’t SNC have something greener for the Dream Chaser?

[@gregblastfpv3623]

Maybe they should start making electric rockets? And launch them through a big boring tunnel or something ;).

[@CarlosAM1]

@@Hoganoutdoors not really that toxic. Check out rocket labs hypergolics

[@Hoganoutdoors]

@@CarlosAM1 Link? From what I gather, it's the hydrazine based fuels that are the nastiest - and the most powerful / ubiquitous. If someone has developed a truly comparable non-toxic hypergolic propellant, I'd think every rocket made would be using it for fail-safe escape systems. Just handling hydrazine is nightmare - most of the other fuels have similar problems from what I gather - some spontaneously combust when exposed to oxygen, others are highly corrosive others are highly toxic, and some are all of the above....and that's just the fuels. Then there's the oxidizers lol....

[@redcharget5894]

If they have liquid fuel systems, why doesn’t the fuel system flow off the rocket?

[@jerry6187]

Becaue the larger tanks are fueled to an exact amount for its purpose

[@aaravagarwal6897]

@Jerry r/wooooooosh

[@sircrabcelot]

@@aaravagarwal6897 r/ihavereddit, fool. Also, r/itswooooshwith4os.

[@drusha]

12:39 but there are also solid fuel engines on the station as well - Soyuz soft landing engines, and they are not booming yet.

[@EverydayAstronaut]

It’s because they’re tucked deep inside the environmentally controlled Soyuz capsule and aren’t exposed to deep thermal cycling

[@mavishome8037]

you told that solid fuel cannot stand temp. differnces in space but soyuz capsules retrorockets are solids so how do they stand temp.differences

[@Doom2pro]

Just as long as the capsule doesn't explode at random.

[@oblaty]

crew dragon propulsive landing when reusing it as a cargo vessel? just an idea :)

[@AnthonyRamirez3D]

Propulsive landing of the Cargo Dragon was how SpaceX originally wanted to test the system but I believe NASA didn't want to put their returning cargo at risk. So SpaceX would have needed to launch their own propulsive landing tests and since these would have required lots of tests, it would have increased the cost significantly. That is one reason SpaceX switched to parachutes as the main landing method.

[@scottfw7169]

Re: "Want an article version of this video?" Yes, I do, thanks!

[@ZMacZ]

05:56 Incorporate the escape module into the landing system. Since landing with parachutes is actually still risky, when any roll occurs, using the escape thruster to land under power is a much better way to land, and then you can deploy the parachute as a last ditch. Just ejecting it when in orbit doesn't make sense to me. The final part of the voyage is always landing, which then may involve the thrust of the escape thruster. When applied correctly it can allow powered guided landings. So basicaly going up, you can use it to escape if and when needed, or going down you can use it to land. Zero loss, powered landing to gain. Also, the tip may help steer a pod coming down. If possible always use what is already there, instead of using something that needs adding to weight.

[@Shielsproductions100]

How long does it take for an abort system to work and have there been cases with space flight we’re astronauts had to abort?.