Some small corrections: 1: the astronauts did not use the OPS while disposing of the PLSS. Rather, they were tethered to an oxygen supply within the LEM while they disposed of the PLSS portion of the backpack. 2: diving suits do not maintain a standard sea level pressure. They are kept relatively close to the pressure of the depth that they are used at.
@@DKiSAerospaceHistory unless they are those pressurized suits with the tether. Deep sea divers apparently use these suits because it keeps them from getting nitrogen poisoning. I've been watching the Titan sub stuff and my recommendations are full of divers talking about the many misfortunes one can experience while scuba diving. 😆
@@kristinfrostlazerbeamsavoiding nitrogen narcosis is achieved through a change in the gas they breath. Mainly, heliox helium oxygen mix. So if you listen to deep sea saturation divers some serious badass humans they have chipmunk voices. You can find more about nitrogen narcosis by looking up gas partial pressure also.
Regarding diving suits versus space suits: Diving suits require the same internal volume as pressure outside changes to hundreds of atmospheres. A spacesuit only requires a difference of at most two atmospheres. Since breathing is the only requirement and we breathe 20% O2 at 1atm you could theoretically get away with just 0.2atm at 100% O2. This was done in early designs of space capsules but cancelled after a certain fire. A leak in a high depth diving suit will instantly kill whoever is inside, the water will expand inwards at the speed of sound of the medium (1400m/s) and the mass flow rate is determined by the pressure (per 10 meters of depth ~+1atm of pressure) This combination is a guaranteed millisecond death. A leak in a spacesuit will move at a glacial 340m/s and a pressure of 1atm. note that these are rough calculations, obviously the diving suit wouldn't kill you at low depth and the spacesuit requires additional isothermic protection.
The concept of providing a lower-pressure, pure O2 environment wasn't canceled. What was changed in Apollo was pumping the cabin up with full sea level pressure pure O2, this changed to 60% O2 and 40% N2 on the pad after the hatch was closed, to lower the risk of fire. The crew was breathing pure O2 in their suits from a couple of hours before launch, though. During launch, as the rocket rose and the air pressure decreased outside, the 60/40 cabin atmosphere was vented out and replaced with pure O2, until the cabin was at about 5psia (more like 30% of sea level pressure), and as close to pure O2 as possible. The pressure suits also relieved from sea level to about 5psia at the same time. From that point, up until they landed on the ocean, Apollo crews were in a 100% O2 environment at roughly 5psia. The lower pressure, plus removal of flammable things like nylon from the cabin, reduced fire risk enough to safely fly the missions. It also had the side effect of letting Apollo crews put on their suits and backpacks, depress their spacecraft, and go right outside, without the need to pre-breathe or adapt to a lower pressure. In fact, during EVAs, the suits tended to be inflated to about 4.1psia, very close to the 0.2atm you mention. That kept the suits from being so rigid it was hard to move in them. The biggest developmental issue Axiom has with these new suits is maintaining a 10psia mixed gas atmosphere in the suits and yet make them so you can move in them. I wish them luck.
@@DougVanDorn I stand corrected, I thought they completely abandoned pure o2 atmospheres after that. I had no idea they vented down to high o2 concentrations. Do you happen to know wether axiom uses helium to achieve greater partial pressure? I cannot find details regarding their gas mix. Though it would be a pita if someone's accelerometer failed due to helium poisoning. I guess we could listen for helium once they put on their suits. Yeah, the main advantage of not using nitrogen is preventing the bends when transitioning pressure differences.
@@DougVanDorn Hmm I was wondering if maintaining enough O2 partial pressure for breathing is the criteria needed, I'm wondering how much leeway is there to lowering it to reduce the effort on the spacesuit. I'm guessing not much since we can pass out at anything lower than 18% O2 concentration Also breathing is one thing and maintaining pressure on the body is another, what is the lower pressure limit you could keep your body at and still stay alive, I was envisioning a spacesuit that divides up the head and body into seperate pressure compartments, the head is fed O2 at 0.2atm and the body is kept at a lower pressure hence flexible, about the chest problem, maybe that's kept restrained mechanically or maybe put in the same compartment as the head I'm guessing I'm proposing some sort of engineering nightmare or there are other issues unbeknownst to me. But it is a fun concept to explore
@@lorisperfetto6021 The Darwin Awards are a satirical, black comedy-based "honour" awarded to people who either die in intensely silly ways, or at the very least destroy their ability to reproduce. Basically, if it would get you on _1000 Ways to Die,_ it's probably a Darwin Award. The archetypal (and actually entirely fictitious) example is the JATO rocket car, the story of a man who strapped a Jet-Assisted Take-Off rocket to his car and fired himself into a canyon wall at ridiculous speeds, leaving nothing but fingernails in the steering wheel and teeth in the rock. As ways to die go, almost asphyxiating yourself inside a suit designed to _let people breathe in a low-oxygen environment_ because you didn't read the instructions is fairly high up the list.
Quick correction -- when the LM crews jettisoned their PLSSes, they didn't switch over to the emergency OPS supply. After the final EVA of a given flight, the crew repressurized the cabin, organized all of the things they were going to throw away that hadn't yet been tossed out onto the surface, putting the smaller items in jett bags. Then they depressurized the cabin one final time, with their suits connected to the LM's suit circuit for oxygen and cooling water. Those hoses were long enough to let the crew open the front hatch and toss all the final stuff they were leaving out the door, including the PLSSes. The OPSes were kept for a possible EVA if the docking system failed after rendezvous, and were only used on the J-mission trans-Earth EVAs.
I posted the same info before I read your post. However, I have a small correction for you. They probably were wearing the liquid cooling garments under their suits, but they weren't hooked up to anything. The LM didn't have a water-cooling system for the suits.
Best quote: "early spaceflight was truly the stuff of nightmares" . I think few people realize what "The right stuff" really means....to not panic and the ability to control your fear being a big part of it. Just the shear claustrophobic conditions alone would freak me out, let alone having to sort out a life or death problem while cramped inside a tiny tin can.
1:06:16 A note about the suit from The Martian - it looks to me like it was inspired heavily by the MIT BioSuit, which uses a *very* tight fabric to provide mechanical pressure instead of air (i remember watching a documentary when i was younger where mike massimino got to wear one and said that he "felt like an italian sausage", although i dont remember which one it was.) Im guessing that the actual mechanical pressure layer is worn on the inside, with an outer layer that houses some kind of temperature control system which would explain why it doesnt look super tight in the movie. The vacuum EVA suits are much bulkier and basically just look like the EMU suit with some extra hinges for better mobility.
I don’t understand why you don’t have millions of views on your videos. The quality of your work is as good or even better as any other content provider on TH-cam or any streaming channel. I’m glad you have advertisers; you deserve it for your hard work. Great video by the way.
@@GentlemansAstronautics hey man, i looked around the internet for a while but couldnt find anything about your BIS alternate moon landing history story. DO you have a link to it by chance becasue it sounds like some really cool sy fy story.
54:09 interesting how some of the labels are mirrored so the astronaut can read it in a mirror. I thought the photo itself was mirrored, but the mission patch isn’t
With regards to Jules Verne: The question of Lunar habitability is raised in the novell (originally they only wanted to send a dead projectile until a french adventurer voluntered to fly to the moon on a one-way trip, taking along the main character and his fierce opponent for plot reasons. The consesus is, that 1. The moon is likely inhabited by intelligent beings 2. The Lunar Atmosphere - if it exists - is thin, yet likely breathable in the lowlands 3. The Moon would serve well to agriculture, the passangers take along animals, seeds and various tools. In the sequel, while on the trip to the moon, they discover one of the dogs they brought along did not survive the violent launch and the decide to throw it out one of the hatches. They adress the problem of exposing the interior to space, however they manage to open a door and throw out the dog, taking care to let as little air as possible to evacuate out of the capsule. Clearly, Verne didnt really have a comprehention of how quickly pressurized air would leak out into a vacuum. Actually, the astronauts are sent around the moon, because there was an error in calculation. They work out their trajectory and perform a course correction with the thrusters they had planned to use for landing, sending them onto a free-return trajectory, leading to a splashdown in the pacific ocean. At no point is the necessity of a spacesuit even discussed, life support systems were deemed only necessary for the trip in the enclosed capsule.
I understand the point you were trying to make relative to physical exertion for microgravity EVA versus lunar EVA, but I tend to think most astronauts might take exception with the assertion that microgravity requires barely no exertion. I've read many astronauts' accounts of EVA, and they all describe it as incredibly physically taxing since any joint movement is a struggle against the suit's pressurization. Even the simple act of closing the hand to grasp a handhold or tool requires such significant force that astronauts have reported losing fingernails.
I was judging by things I've heard such as only "finger-tip pressure" needed to open the massive solar arrays on the ISS so that they could be unfurled. You make a fair point though.
So fun fact! My Grandfather helped United Technologies as a senior project engineer on the equipment used on space suits!! If memory serves right he worked on the rings for supplying oxygen, and water for cooling. I don’t care if it was a tiny piece, or the whole suit. He was a part of history.
I guess we all have to learn to appreciate function over form. Even if we had zero budgetary limitations, there is no safer way to go to space than what we’ve set out for this half of the century.
the inflatable airlock on the voshod was truly something terrifying. like we're still not perfectly comfortable with that tech and the ussr did it on step 2 of spaceflight
I mean, it kind of makes sense to use a diving suit as a primitive space suit. They're supposed to be reasonably gas-tight, and resistant to pressure gradients. The direction of said pressure gradient is likely immaterial for most parts of the suit, and for the parts it is relevant, the magnitude of the difference likely matters more. Similar to how the pressure hull of a submarine would actually be a decent spacecraft if the other submarine parts that relied on water were swapped out, and assuming you could get it up there (good use for an Orion Drive).
I was watching something.. then I saw that this was posted, and I guess the rest of the story is self-evident! 😅 i'll ALWAYS drop what im doing for a new upload
Thank you for making these videos. They are really excellent! What i love about them is that they are for space enthusiasts, and provide much more than surface level facts. As always... commenting, liking, sharing with space nerd friends for the algo.
5:24 while scientists had pretty good knowledge of the moon's lack of atmosphere, there was still a lot of popular 'proto-scifi' books and articles (as well as hoaxes) that treated the moon, and all other planets in the solar system, as having atmospheres as well as sentient civilizations. Many of these beliefs persisted well into the 20th century. This is a good video about that history: th-cam.com/video/LhfCietvDZo/w-d-xo.htmlsi=ykr3wSd12juvqYC5
Interesting and informative. However, I think you made one small error. When the astronauts jettisoned the two PLSS backpacks, they were on the LM's life support connections, not the O2 purge system. They did keep the OPS's in case they needed it for an emergency crew transfer if there was a problem with the docking.
Incredible journey of how man is constantly developing better and better solutions to survive in extreme environments. Love your videos; keep up the good work! 👍
Seems like the FOD, regolith, and dust contamination is going to be the next big problem and limitation that needs to be addressed if any of our next big crewed steps in space are to ever be achieved
Okay I almost missed the goobus as I was listening while doing other things - guess I'll need to pay attention more closely! Oh and again at the end! Aw hell yeah - I'll need to host watchalongs in HEFS for major space missions again!
Great video! The bit about Playtex, ILC, and Chrysler was very interesting to me as I have grandparents who worked for Chrysler in their rocket division back in ghe day, they didn't do engineering but kid me finding out that grandpa and grandma worked for Chrysler, a car company in my head, making rockets was so cool. We still have some of the old punch card machine cars drawers from Chrysler for storing tools, I bet you could hit them with a tank and they wouldn't move.
One cute point about tossing the PLSSes after the final moonwalks -- while the hoses were long enough to bend down and toss things out the hatch while connected to the LM's suit circuit, it was still sorta hard to bend like that. Especially in the A7L suits before the waist joint was added to the A7LB. Therefore, on at least one flight (I think it was Apollo 14), the TV camera was running while the PLSSes were jettisoned, and Houston remarked that they seemed to leave the hatch with some velocity. The crew admitted that they wanted the backpacks to clear the front porch and the ladder, but didn't want to bend over that far, so they set them on the hatch frame and *kicked* them out. This was likely done after Neil and Buzz reported that one of their backpacks barely cleared the porch and sort of bounced on the ladder rungs, before landing in the front footpad. I think they just wanted a little more clearance, lol...
26:03 This channel got me to say ge-minee instead of Gem-in-i when pronouncing Gemini in relation to the American space program. Congrats. Also, I heard, from Adam Savage of Mythbusters, that the mercury suits were silver because the designers were taking cues from Flash Gordon, Buck Rodgers, and other early space fiction, and they though a space suit was supposed to look silver. Is this true? I fell like you'd be the one to really know.
I said this awhile back, but, the way NASA said it, is actually closer to the word's original pronunciation. The long-i ("eye") sound is about 500 or so years old, the short-i (ee) goes back thousands.
21:42 They went to the trouble of spray painting 2 pairs of boots, but they couldn't put the guys without boots in the back so their feet weren't visible in the first place???
In the timeline where an accelerated Black Arrow program eventually leads to British space knights putting the first boots on the lunar regolith, did QE2 get to style herself Empress of the Moon? Inquiring minds want to know.
@@jarrodcath7835 creator of that Alt hist here, the space race actually starts nearly 2 decades earlier than expected in 1947, so no black arrow, only really really big V2 derived rockets
2 วันที่ผ่านมา +2
Are you going to live stream the starship launch tommorow
I hoped you would go a bit more in depth about the joints on Apollo suits. The A7LB had such a huge joint at the waist, it would be interesting to know how it worked without all the ugly hard shell stuff you see in modern designs.
I love your videos and really love the message at the end of this one, but I kinda wish you cited the sources you use under the description or something. Makes it a bit more authentic. For me personally that would help speed up the process of looking for reliable sites on similar topics.
Some small corrections:
1: the astronauts did not use the OPS while disposing of the PLSS. Rather, they were tethered to an oxygen supply within the LEM while they disposed of the PLSS portion of the backpack.
2: diving suits do not maintain a standard sea level pressure. They are kept relatively close to the pressure of the depth that they are used at.
@@DKiSAerospaceHistory unless they are those pressurized suits with the tether. Deep sea divers apparently use these suits because it keeps them from getting nitrogen poisoning. I've been watching the Titan sub stuff and my recommendations are full of divers talking about the many misfortunes one can experience while scuba diving. 😆
Excellent documentary.
@@kristinfrostlazerbeamsavoiding nitrogen narcosis is achieved through a change in the gas they breath. Mainly, heliox helium oxygen mix. So if you listen to deep sea saturation divers some serious badass humans they have chipmunk voices. You can find more about nitrogen narcosis by looking up gas partial pressure also.
Also Collins Aerospace cancelled their contract with NASA, they’re not making a suit anymore
@@earth-apogee that's kinda in the video man. Notice how the Ax-EMU mentions Axiom and Prada only?
Regarding diving suits versus space suits:
Diving suits require the same internal volume as pressure outside changes to hundreds of atmospheres.
A spacesuit only requires a difference of at most two atmospheres. Since breathing is the only requirement and we breathe 20% O2 at 1atm you could theoretically get away with just 0.2atm at 100% O2. This was done in early designs of space capsules but cancelled after a certain fire.
A leak in a high depth diving suit will instantly kill whoever is inside, the water will expand inwards at the speed of sound of the medium (1400m/s) and the mass flow rate is determined by the pressure (per 10 meters of depth ~+1atm of pressure) This combination is a guaranteed millisecond death.
A leak in a spacesuit will move at a glacial 340m/s and a pressure of 1atm.
note that these are rough calculations, obviously the diving suit wouldn't kill you at low depth and the spacesuit requires additional isothermic protection.
The concept of providing a lower-pressure, pure O2 environment wasn't canceled. What was changed in Apollo was pumping the cabin up with full sea level pressure pure O2, this changed to 60% O2 and 40% N2 on the pad after the hatch was closed, to lower the risk of fire. The crew was breathing pure O2 in their suits from a couple of hours before launch, though. During launch, as the rocket rose and the air pressure decreased outside, the 60/40 cabin atmosphere was vented out and replaced with pure O2, until the cabin was at about 5psia (more like 30% of sea level pressure), and as close to pure O2 as possible. The pressure suits also relieved from sea level to about 5psia at the same time. From that point, up until they landed on the ocean, Apollo crews were in a 100% O2 environment at roughly 5psia. The lower pressure, plus removal of flammable things like nylon from the cabin, reduced fire risk enough to safely fly the missions. It also had the side effect of letting Apollo crews put on their suits and backpacks, depress their spacecraft, and go right outside, without the need to pre-breathe or adapt to a lower pressure. In fact, during EVAs, the suits tended to be inflated to about 4.1psia, very close to the 0.2atm you mention. That kept the suits from being so rigid it was hard to move in them. The biggest developmental issue Axiom has with these new suits is maintaining a 10psia mixed gas atmosphere in the suits and yet make them so you can move in them. I wish them luck.
@@DougVanDorn I stand corrected, I thought they completely abandoned pure o2 atmospheres after that. I had no idea they vented down to high o2 concentrations.
Do you happen to know wether axiom uses helium to achieve greater partial pressure? I cannot find details regarding their gas mix. Though it would be a pita if someone's accelerometer failed due to helium poisoning. I guess we could listen for helium once they put on their suits.
Yeah, the main advantage of not using nitrogen is preventing the bends when transitioning pressure differences.
@@DougVanDorn Hmm I was wondering if maintaining enough O2 partial pressure for breathing is the criteria needed, I'm wondering how much leeway is there to lowering it to reduce the effort on the spacesuit. I'm guessing not much since we can pass out at anything lower than 18% O2 concentration
Also breathing is one thing and maintaining pressure on the body is another, what is the lower pressure limit you could keep your body at and still stay alive, I was envisioning a spacesuit that divides up the head and body into seperate pressure compartments, the head is fed O2 at 0.2atm and the body is kept at a lower pressure hence flexible, about the chest problem, maybe that's kept restrained mechanically or maybe put in the same compartment as the head
I'm guessing I'm proposing some sort of engineering nightmare or there are other issues unbeknownst to me. But it is a fun concept to explore
Charlie Duke once said in an interview that the moment he fell over was the only time during the Apollo 16 were he was afraid
I like the stripes being named “public affairs stripes.” I can just imagine an engineer with no interest in aesthetics coming up with that name
Seems like a simple and accurate name from the engineer's perspective. 😂
Guys I just looked it up and they only had that name for 24 hours before being renamed Commander’s Stripes
@@JKTCGMV13 The actual PAOs saw the document and went "no." 🤣
I need to binge watch moon footage. The way they talk is so funny. “That ain’t any fun, is it?” when your buddy almost dies lmao
The guy helping the other one up, while he's exclaiming a very stressed mayday is hysterical!
The number one trait in any astronaut: Calm under pressure.
Thank you for reminding your viewers that "The Everyday Astronaut" tried to earn himself a Darwin award.
@AndrewSkow1 what do you mean?
@@lorisperfetto6021 The Darwin Awards are a satirical, black comedy-based "honour" awarded to people who either die in intensely silly ways, or at the very least destroy their ability to reproduce. Basically, if it would get you on _1000 Ways to Die,_ it's probably a Darwin Award. The archetypal (and actually entirely fictitious) example is the JATO rocket car, the story of a man who strapped a Jet-Assisted Take-Off rocket to his car and fired himself into a canyon wall at ridiculous speeds, leaving nothing but fingernails in the steering wheel and teeth in the rock.
As ways to die go, almost asphyxiating yourself inside a suit designed to _let people breathe in a low-oxygen environment_ because you didn't read the instructions is fairly high up the list.
@@lorisperfetto6021 What DON'T I mean.
@@AndrewSkow1 I seriously did not understand what you meant. What is a Darwin award?
How did he do that?
Quick correction -- when the LM crews jettisoned their PLSSes, they didn't switch over to the emergency OPS supply. After the final EVA of a given flight, the crew repressurized the cabin, organized all of the things they were going to throw away that hadn't yet been tossed out onto the surface, putting the smaller items in jett bags. Then they depressurized the cabin one final time, with their suits connected to the LM's suit circuit for oxygen and cooling water. Those hoses were long enough to let the crew open the front hatch and toss all the final stuff they were leaving out the door, including the PLSSes. The OPSes were kept for a possible EVA if the docking system failed after rendezvous, and were only used on the J-mission trans-Earth EVAs.
I was misinformed then. Sorry about that.
Good to know!
I posted the same info before I read your post. However, I have a small correction for you. They probably were wearing the liquid cooling garments under their suits, but they weren't hooked up to anything. The LM didn't have a water-cooling system for the suits.
Best quote: "early spaceflight was truly the stuff of nightmares" . I think few people realize what "The right stuff" really means....to not panic and the ability to control your fear being a big part of it. Just the shear claustrophobic conditions alone would freak me out, let alone having to sort out a life or death problem while cramped inside a tiny tin can.
14:31 that's a British Boys anti tank rifle, .55 caliber, and that drawing is badass as hell
@@cascadianrangers728 thank you!
Une of the most underrated channels on YT
Early suits go hard. They look so cool, especially knowing how cutting edge they were
1:06:16 A note about the suit from The Martian - it looks to me like it was inspired heavily by the MIT BioSuit, which uses a *very* tight fabric to provide mechanical pressure instead of air (i remember watching a documentary when i was younger where mike massimino got to wear one and said that he "felt like an italian sausage", although i dont remember which one it was.) Im guessing that the actual mechanical pressure layer is worn on the inside, with an outer layer that houses some kind of temperature control system which would explain why it doesnt look super tight in the movie. The vacuum EVA suits are much bulkier and basically just look like the EMU suit with some extra hinges for better mobility.
Did I just spot a Moonbase Alpha reference?
John MADDEN
aeiou
bbbaaaaaaoooooooooooobb
John Madden! John Madden! John Madden!
Football!
John MADDEN
Dkis uploaded, smackin it against the screen rn
😳
I don’t understand why you don’t have millions of views on your videos. The quality of your work is as good or even better as any other content provider on TH-cam or any streaming channel. I’m glad you have advertisers; you deserve it for your hard work. Great video by the way.
While waiting for this I was watching your whole library backwards. Awesome stuff!
16:17 Thank you so much for the shoutout! I can now die happy
that was the only part of the documentary i DIDNT like
@@swayzefan3600 hater
@@GentlemansAstronautics hey man, i looked around the internet for a while but couldnt find anything about your BIS alternate moon landing history story. DO you have a link to it by chance becasue it sounds like some really cool sy fy story.
@@GentlemansAstronautics Where can I read your althistory? Sounds so cool!
1:07:29 Thanks to you for commissioning me, it was fun making the drawing of the gooba ;D
I had a real triple-take moment seeing two of my hobbies collide violently like this.
We have a shark in space before GTA6
Love the BIS lunar EVA suit, it looks so crazy, but I am all for it!
@@HereticalKitsune even better was the drawings where the guy is holding a boys anti tank rifle😂😂😂
@@remystrach5212 thanks, lol
I love long form videos ❤
4:53 Might be confusion because of subsecuent reprints both the original and sequels are included together
Anyone notice Handsome Squidward at 8:20?
These just keep getting better and better. Keep it up, DKIS. I would definitely love a deeper dive into the Apollo suits and the companies involved.
54:09 interesting how some of the labels are mirrored so the astronaut can read it in a mirror. I thought the photo itself was mirrored, but the mission patch isn’t
With regards to Jules Verne:
The question of Lunar habitability is raised in the novell (originally they only wanted to send a dead projectile until a french adventurer voluntered to fly to the moon on a one-way trip, taking along the main character and his fierce opponent for plot reasons. The consesus is, that
1. The moon is likely inhabited by intelligent beings
2. The Lunar Atmosphere - if it exists - is thin, yet likely breathable in the lowlands
3. The Moon would serve well to agriculture, the passangers take along animals, seeds and various tools.
In the sequel, while on the trip to the moon, they discover one of the dogs they brought along did not survive the violent launch and the decide to throw it out one of the hatches. They adress the problem of exposing the interior to space, however they manage to open a door and throw out the dog, taking care to let as little air as possible to evacuate out of the capsule. Clearly, Verne didnt really have a comprehention of how quickly pressurized air would leak out into a vacuum.
Actually, the astronauts are sent around the moon, because there was an error in calculation. They work out their trajectory and perform a course correction with the thrusters they had planned to use for landing, sending them onto a free-return trajectory, leading to a splashdown in the pacific ocean.
At no point is the necessity of a spacesuit even discussed, life support systems were deemed only necessary for the trip in the enclosed capsule.
I understand the point you were trying to make relative to physical exertion for microgravity EVA versus lunar EVA, but I tend to think most astronauts might take exception with the assertion that microgravity requires barely no exertion. I've read many astronauts' accounts of EVA, and they all describe it as incredibly physically taxing since any joint movement is a struggle against the suit's pressurization. Even the simple act of closing the hand to grasp a handhold or tool requires such significant force that astronauts have reported losing fingernails.
I was judging by things I've heard such as only "finger-tip pressure" needed to open the massive solar arrays on the ISS so that they could be unfurled.
You make a fair point though.
4:09
Diving suits are soft, so require internal pressure equal to that of the external environment.
21:50 Seeing Gura in this video was one of the last things I could have expected 😂
Glad to see this out. Love your videos DKiS
how do you find these random images that go SO HARD??
So fun fact!
My Grandfather helped United Technologies as a senior project engineer on the equipment used on space suits!!
If memory serves right he worked on the rings for supplying oxygen, and water for cooling.
I don’t care if it was a tiny piece, or the whole suit.
He was a part of history.
13:00 pic goes so hard🔥
I think the diving suit thing is fitting. After all, we use stock space suits in the neutral buoyancy lab at NASA and they work fine as diving suits.
I guess we all have to learn to appreciate function over form. Even if we had zero budgetary limitations, there is no safer way to go to space than what we’ve set out for this half of the century.
Please, PLEASE, at some point, make the pun linking 'crewed spaceflight' and 'crude spaceflight'
the inflatable airlock on the voshod was truly something terrifying. like we're still not perfectly comfortable with that tech and the ussr did it on step 2 of spaceflight
Loving the music you use around 27:00 minutes
Honestly the tintin moon suit is actually not that bad of an idea for a space suit
1:07:19 Why are you so based
a
I mean, it kind of makes sense to use a diving suit as a primitive space suit. They're supposed to be reasonably gas-tight, and resistant to pressure gradients. The direction of said pressure gradient is likely immaterial for most parts of the suit, and for the parts it is relevant, the magnitude of the difference likely matters more.
Similar to how the pressure hull of a submarine would actually be a decent spacecraft if the other submarine parts that relied on water were swapped out, and assuming you could get it up there (good use for an Orion Drive).
I was watching something.. then I saw that this was posted, and I guess the rest of the story is self-evident! 😅
i'll ALWAYS drop what im doing for a new upload
Congrats on the sponsor! Great video as always.
Thank you for making these videos. They are really excellent! What i love about them is that they are for space enthusiasts, and provide much more than surface level facts. As always... commenting, liking, sharing with space nerd friends for the algo.
Did the Soviets test their EVA suit in a vacuum chamber?
I didn't find any information saying they did.
20:51 Gordo Cooper is what you think of when you think of Mercury 7 astronaut.
26:00 - Geminee supremacy!
5:24 while scientists had pretty good knowledge of the moon's lack of atmosphere, there was still a lot of popular 'proto-scifi' books and articles (as well as hoaxes) that treated the moon, and all other planets in the solar system, as having atmospheres as well as sentient civilizations.
Many of these beliefs persisted well into the 20th century.
This is a good video about that history: th-cam.com/video/LhfCietvDZo/w-d-xo.htmlsi=ykr3wSd12juvqYC5
All space suits need capes.
Interesting and informative. However, I think you made one small error. When the astronauts jettisoned the two PLSS backpacks, they were on the LM's life support connections, not the O2 purge system. They did keep the OPS's in case they needed it for an emergency crew transfer if there was a problem with the docking.
Every evening I come home from work and see a new DKIS video is a good evening...
We’re going to need spacesuits for pig cuz I ain’t leaving Earth without bacon
A 4 hour video was an option!?! Oh god we almost had perfection, do it!
Incredible journey of how man is constantly developing better and better solutions to survive in extreme environments. Love your videos; keep up the good work! 👍
The BIS suit looks like something out of Warhammer 40k.
12:55 that would make such an awesome albun cover. Someone please do this!!
The video is here at last! Another gift to us all!
Seems like the FOD, regolith, and dust contamination is going to be the next big problem and limitation that needs to be addressed if any of our next big crewed steps in space are to ever be achieved
56:54 "Italian astronaut was caught boiling pasta in his space suit"
Awesome 👍🏻 Been looking forward to this video and it didn't disappoint. Thank you for all your hard work and dedication to delivering to us
Another excellent piece - really enjoyed that one! Looking forward to your next project.
Okay I almost missed the goobus as I was listening while doing other things - guess I'll need to pay attention more closely!
Oh and again at the end!
Aw hell yeah - I'll need to host watchalongs in HEFS for major space missions again!
Houston, we have a "bao, bao".
Omg that artwork is so cute 🥰
Pre-notification and absolutely looking forward too this.
It’s like Christmas morning every time you upload
Hey it's been approved, nice
Already saw it, but another time wouldn't hurt especially when it actually benefits you now 😅
SHHH YOU DIDN'T SEE ANYTHING
Great video! The bit about Playtex, ILC, and Chrysler was very interesting to me as I have grandparents who worked for Chrysler in their rocket division back in ghe day, they didn't do engineering but kid me finding out that grandpa and grandma worked for Chrysler, a car company in my head, making rockets was so cool. We still have some of the old punch card machine cars drawers from Chrysler for storing tools, I bet you could hit them with a tank and they wouldn't move.
This is shaping to be a great start to a new week!! THX for all your hard work!!!
I've been looking forward to this video!! It's gonna be interesting to listen to the whole video, ( as a blind man it's a awesome podcast)🎉
I'm so glad you're able to enjoy my content. Thank you for listening!
One cute point about tossing the PLSSes after the final moonwalks -- while the hoses were long enough to bend down and toss things out the hatch while connected to the LM's suit circuit, it was still sorta hard to bend like that. Especially in the A7L suits before the waist joint was added to the A7LB. Therefore, on at least one flight (I think it was Apollo 14), the TV camera was running while the PLSSes were jettisoned, and Houston remarked that they seemed to leave the hatch with some velocity. The crew admitted that they wanted the backpacks to clear the front porch and the ladder, but didn't want to bend over that far, so they set them on the hatch frame and *kicked* them out. This was likely done after Neil and Buzz reported that one of their backpacks barely cleared the porch and sort of bounced on the ladder rungs, before landing in the front footpad. I think they just wanted a little more clearance, lol...
This is a good, well researched video.
Not only did NASA just spray paint work boots silver, they spray painted them rather poorly
Great documentary. Thank you.
Excellent video. Nice summary of spacesuit history. I really enjoyed watching it, bravo!
For the algorithm!!
(Love your documentaries btw they are superb and this one is no exception, love listening to these on deliveries)
YESS!!! I’ve been waiting for weeks!
I appreciate the continued gawr gura cameos
oh the space history too that's nice too
26:03 This channel got me to say ge-minee instead of Gem-in-i when pronouncing Gemini in relation to the American space program. Congrats.
Also, I heard, from Adam Savage of Mythbusters, that the mercury suits were silver because the designers were taking cues from Flash Gordon, Buck Rodgers, and other early space fiction, and they though a space suit was supposed to look silver. Is this true? I fell like you'd be the one to really know.
I said this awhile back, but, the way NASA said it, is actually closer to the word's original pronunciation. The long-i ("eye") sound is about 500 or so years old, the short-i (ee) goes back thousands.
21:42 They went to the trouble of spray painting 2 pairs of boots, but they couldn't put the guys without boots in the back so their feet weren't visible in the first place???
Excited to watch this at work!!! Been waiting for this video!!
This video was awesome!!! Such great work, excited for what videos come in the future
This is going to be awesome
Is there a good book preferably pdf about the detailed workings of a space suit
"Dressing for Altitude" is a good one, can be found in a lot of places.
Thanks @@DKiSAerospaceHistory
A brief history of space suits... AND IT IS AN HOUR LONG?!?!?!
47:30 looks like a gold Daytona on his wrist but it’s too hard to tell
Can you make a history of the Starship program?
I can't really do a history of something that is ongoing, no.
@@DKiSAerospaceHistory oh then maybe a history of Falcon program?
@@AbhikKumarBhunia-c9l It can certainly be a possibility in the future. For the time being, I have a pretty lengthy list of ideas.
Another great video. Thank you!
Brilliant
😳 Brilliant! A sponsor that gives a good product, not a scam product. Exceptional
Nice history.
Awesome video. Can't wait to finish it after classes
In the timeline where an accelerated Black Arrow program eventually leads to British space knights putting the first boots on the lunar regolith, did QE2 get to style herself Empress of the Moon? Inquiring minds want to know.
@@jarrodcath7835 creator of that Alt hist here, the space race actually starts nearly 2 decades earlier than expected in 1947, so no black arrow, only really really big V2 derived rockets
Are you going to live stream the starship launch tommorow
I likely won't have time unfortunately. I might still try.
I really enjoyed the video
Perfect timing. About to drive a 4 hour round trip!
5:11 the space suits in that movie were thick, heavy wool coats.
Waiting for the obligatory Neuro-sama reference when doing a deep dive into ship ai.
I hoped you would go a bit more in depth about the joints on Apollo suits. The A7LB had such a huge joint at the waist, it would be interesting to know how it worked without all the ugly hard shell stuff you see in modern designs.
I love your videos and really love the message at the end of this one, but I kinda wish you cited the sources you use under the description or something. Makes it a bit more authentic.
For me personally that would help speed up the process of looking for reliable sites on similar topics.
Will do.
Another superb piece of work. Enjoyable and very informative.