Happy Birthday Crawlers

As it gears up for the next leg of the manned exploration of space, NASA is celebrating the 50th work anniversary of its two mightiest and most stalwart servants, Crawler Transporter 1 and Crawler Transporter 2, each of which has already traveled around 2,000 miles, all over the coarse gravel trackways of the Cape.

http://spaceflight.nasa.gov/gallery/images/apollo/apollo12/hires/s69-51309.jpg

These two marvels were manufactured by the Marion Shovel Company in Marion, Ohio, and entered service in 1966 by moving the Apollo 4 test vehicle out to the pad.

Each crawler is 131 feet long and 114 feet wide, and weighs 6 million pounds. Diesel generators drive 16 electric motors, and a complex jacking and leveling system that permits the versatile beasts to sidle up beneath whatever needs to be moved and latch on with four pickup points spaced 90 feet apart on the upper deck.

Here is one of the crawlers carrying Apollo 12 from the VAB, where it was assembled on its mobile launcher, to the pad:

http://www.savethelut.org/MLDocs/ap12-KSC-69PC-529HR.jpg

Here is the unmanned Apollo 4 test flight, sitting over the flame deflector. Note that the crawler has scuttled off to safety:

https://airandspace.si.edu/sites/default/files/images/S67-43593h.jpg

Here is a Crawler carrying the Shuttle Mobil Launcher and a couple of SRBs as part of a vibration test:

Image result for crawler carrying shuttle vibration test

And here is Crawler Transport hauling the Space Shuttle mobile launcher:

Image result for crawler transporter 1 sps launcher test

Designed to carry the Saturn V and its mobile launcher, the crawlers are now being upgraded to carry up to 18 million pounds.

To my mind, these 50 year-old workhorses are highly flexible and versatile, and excellent examples of government work done right.

That Our Flag Was Still There

I was recently asked about this pair of images, suggested by moon hoaximonkians that the whole Apollo program was one big load of bull, as real and Donald Trump’s hair:main-qimg-91095b3a66dea9ae83e04217569e73a3

The flags in these two shots are suspiciously similar…These side-by-side comparisons reveal the startling fact that BOTH flags are billowing positively towards the camera…blah blah, blah.”

Originally, I suspected these had been modified as is often the case with hoax monkeys, who either twist things to fit their narrative or simply don’t bother to go find decent quality source material open which to base their flights of fancy. After all, the image on the left was used in a well-known composite called “Flag and Earth,” created in 2003 by Ricardo Salamé Páez.

However, good quality scans are available at Apollo 11 Image Library. Neither is from the Data Acquisition Camera. Both are from magazine 40, loaded into the Hasselblad used for the first EVA. The image on the left is cropped from magazine shot 5905. The one on the left is cropped and blown up from shot 5885.

If the images appear similar, it’s because they are pictures of the same flag photographed from opposite vantage points. For analysis, NASA compiled this map of all features, equipment, and photos taken at the Apollo 11 landing site:

So the images are real, just carefully cropped and manipulated from low quality source and presented with a false claim that they are impossibly “billowing” in the wrong directions. How this is any sort of hoax claim is hard to imagine. After all, someone would have to go to a lot of trouble to MAKE this happen, it’s not like a flag would be very likely to “billow” identically in two different directions in two different shots on its own.

In fact, the flag is not billowing at all. It’s hanging motionless from a metal rod. The rod is too short for the flag so that the fabric can be gathered like a curtain, to sort of simulate waving, but w the moon, they found the end retained the curl from having spent months packed tightly inside a narrow plastic tube. There may also be static electricity at play, this being nylon in a perfectly dry environment.

But okay, it’s a silly claim, but let’s take a look.

First the right image. This is the highest resolution available for this image, blown up to match the size of the left image, and I defy anyone to definitively determine whether any of the folds are towards or away from the camera. The only thing clear in this fuzzy frame is that the flag is fairly opaque. It’s hard to tell from this frame, but we know from the log and from the other picture that the curl near the end of the strips is not a simple bend or roll but is bunched, so it makes sense that it will cast a similar shadow on both sides (it is is similar, but not identical).

Now the left image. Here it’s quite clear that this is not a flag billowing in the breeze but is creased and crumpled cloth. The “billow” indeed appears to project toward the camera on both sides–it isn’t a billow, it’s a gather or bunch.: The shadow is similar but not identical on each side, and what should be the upper left corner (the little flap protruding a third of the way from the bottom, clearly is on the side facing the camera. Going back, the same protrusion is clearly behind the flag in the right image.

And the more you compare the images, considering the stripes are pointing almost directly into the sun, you can see that we are looking at mirror faces of the same, non-moving flag. The fold in the lower stripes in the left image covers one star that remains visible in the right image. A fold at the bottom of the “billow” in the right image is covered in the left. Looking at the ripples where the stars attach to the the rod, the ripples occur in precisely the same spot in each frame, but the prominently lit star in the upper right of the left image is hidden in shadow in the right–the ripples are reversed as they should be.

So like everything put forth by the hoax monkeys, close analysis of good source material only counters the claim.


Forget the conspiracies. Get some intentional fiction free from C Stuart Hardwick

About This Moon Malarky

I try to be tolerant and understanding of other people’s positions, but moon-hoax conspiracultists really get my dander up. I mean….I mean…no, we’ll come back to that.
My recent post, Yes virginia we really did land on the moon has been very popular, and prompted someone on Quora to asked what are the best pieces of evidence that the moon landings were faked. Well, there are none. No, really. None at all. There are only assertions made by people who have absolutely. No. Clue:
  • No stars in pictures (camera stopped down for lunar surface )
  • Flags waving (held by wire)
  • Apollo 11 flag “billowing ” (it was curled from long storage)
  • No blast crater under the LEM (early engine cutoff was to prevent cratering)
  • Dust around the lander. Or something.
  • Non-parallel shadows. (The moon has terrain)
  • Seemingly identical backgrounds. (when kilometers away)
  • Lander unable to balance itself on a rocket. (Like Surveyor and Lunakod did? Like space-X did–YESTERDAY–with six times the gravity and cross winds?)
  • Lunar trainer impossible to fly. (It was not, except when it broke).
  • No flames from lunar launch. (small UDMH engine in a vacuum)
  • Herky-jerky movement of LEM (in low frame rate engineering camera films)
  • No RCS plumes (in same footage with shutter speed less than thruster duration)
  • Astronauts footage shot in slow-motion (demonstrably not so)
  • Why was every picture perfect? (Because NASA didn’t put the crappy ones in Life—but they are on the website)
  • Missing crosshairs in photos (because LIGHT)
  • The deadly radiation of space (is not deadly for a mere camping trip)

accident-christmas

Every single assertion made by these hoaxicanians only demonstrates their own ignorance of physics, optics, basic science, basic math, how to keep a secret (tell only two people–then kill them), how rockets work, how air works, how inertia works, the effects of radiation on the human body, how static charge affects objects, the state of electronics in the 1960s, how TV works, gravity–and EVERY OTHER SINGLE THING

But that’s okay. If it will make the world a better place and my blog a busier nexus of nerd-dom, I’m prepared to refute every single claim by any hoaxicanian anywhere, no matter how daft or ditsy–if that’s what you all would like.

But first, what think ye of this quick and dirty stab? Does this do it in a nutshell? Want more? Have a few dozen more assertions to add to my list (I’ve heard some doozies)? Let me know. The more the merrier.

Why Are There No Stars On the Moon?

Moon hoax wackadoos have long complained that we couldn’t have gone to the moon because there are no stars in the pictures. It all had to have been shot on a sound stage. By idiots. Too stupid to think of the stars.

Right. Actually, prominent stars in the Apollo picture would have been suspicious. As anyone who’s ever played around with a camera at night can tell you, stars are only a little brighter than moon hoaxers. We went to the moon in the daytime. When you set a camera’s exposure to capture shiny spacecraft and smiling ‘nauts posing on a gleaming lunar surface, the stars kinda fade away. They ARE there, though, if you look for them.

This is frame 5905 from magazine 40 shot during Apollo 11. Stars are clearly visable at full res (http://www.hq.nasa.gov/alsj/a11/AS11-40-5905HR.jpg).as11-40-5905hr
AS14-64-9197, from EVA2 on Apollo 14:https://www.hq.nasa.gov/alsj/a14/AS14-64-9197HR.jpg
That’s Earth up in the sky, and Venus to the right of the antenna. Blow this image up and you can see a number of the brighter stars.
Here is 9207 from magazine 64, with a number of stars clearly in evidence even without full resolution:
https://www.hq.nasa.gov/alsj/a14/AS14-65-9207HR.jpg
And here is a color shot from magazine 67 showing a few dim stars, the brightest directly above the lunar ranging retroreflector:
https://www.hq.nasa.gov/alsj/a14/AS14-67-9386HR.jpg
The stars are right where they are supposed to be. The only mystery is, why a bunch of numnuts who don’t understand such a fundamental aspect of photography as exposure, presume to attempt photoanalysis in the first place.
By the way, these are all scans from prints, available at Apollo 14 Lunar Surface Journal

 

As always, skepticism is healthy, paranoid delusion, less so. Have your own favorite example of moon hoaxican tripping over their own brains? Leave a comment and share.

Outer Spacey Music

The media has been all abuzz today with amazing “revelations” of alien music heard by the crew of Apollo 10 on the dark side of the moon and “classified” until 2008.

Really?

Got a source for that guys? A source other than Fox News or the Interwebs? Cause I do, and it’s not classified, it’s right on the official web site of Nasa’s history office: http://history.nasa.gov/ap10fj/as10-day5-pt20.htm

Some Apollo data was classified at the time (remember the Cold War and the Space Race?) and some of it might not have been released in a timely manner due to oversight, but there was certainly no special treatment given to this event on some “spooky” account. How do I know? Simple. I read the freakin transcript.

Here’s the deal. Apollo 10 went to the moon and did everything but touch down. They detached the LEM and maneuvered in space, the CSM and the LEM, orbiting together as the LEM prepared to go down on a checkout flight. The idea was to run through a landing, but do a planned abort to test the ascent propulsion system and guidance without getting too low for rescue by the CSM in case of failure.

What is being reported as some great mystery is this exchange, plainly recorded in the publicly available transcript just as they were testing their radar (Snoopy is the Lunder lander, flying free of the CSM):

102:12:53 Stafford (in Snoopy): You want some more brownies?

102:12:54 Cernan (in Snoopy): No.

102:12:56 Stafford (in Snoopy): [Garbled] go hungry.

102:13:02 Cernan (in Snoopy): That music even sounds outer-spacey, doesn’t it? You hear that? That whistling sound? (This is the first mention of the sound.)

102:13:06 Stafford (in Snoopy): Yes.

102:13:07 Cernan (in Snoopy): Whooooooooooo.

102:13:12 Young (in CSM): Did you hear that whistling sound, too?

102:13:14 Cernan (in Snoopy): Yeah. Sounds like – you know, outer-space-type music.

102:13:18 Young: I wonder what it is.

102:13:20 (Cernan and Stafford discuss burned insulation outside their LEM windows.)

102:13:29 Cernan (in Snoopy): – eerie, John?

102:13:34 Young: Yes, I got it, too. I was going to see who was outside.

102:13:45 Stafford (in Snoopy): You mark that set of features, Gene-o. I’m going to fix us some grape juice. OK? (Stafford is clearly taking Young’s remark as a joke. All is well.)

. . .[The next three minutes are spent discussing photography of a lunar crater, altitude and range, and how well the radar is performing.]. . .

102:17:58 Cernan (in Snoopy): Boy, that sure is weird music.

102:18:01 Young: We’re going to have to find out about that. Nobody will believe us.

102:18:07 Cernan (in Snoopy): No. It’s a whistling, you know, like an outer space-type thing. (He means like a theramin, commonly used in scifi movies of his youth. In fact, it sounds more like a lightning strike creating shortwave radio noise that travels around the ionosphere back on earth, but its much more uniform than that.)

phasing-insertion-sml

102:18:10 Young: Probably due to the VHF ranging, I’d guess. (Yeah, that’s what it sounds like to me too, either that or electrical noise from static charge movement we now know to occur near the lunar terminator due to the solar wind.)

102:18:16 Cernan (in Snoopy): Yes. I wouldn’t believe there’s anyone out there. OK, Tom, I’m going to call up P20 (Program 20, universal tracking–using the radar).

102:18:26 Cernan (in Snoopy): We want to pressurize our APS here. You get your Rendezvous Radar breakers all In?

102:18:29 Stafford (in Snoopy): Oh, yes. I’m locked on to him (The LEM radar is locked onto the CSM)

102:18:31 Cernan (in Snoopy): OK.

102:18:42 Stafford (in Snoopy): It may be a side lobe (The “music” might be a side lope of the radar beam interfering with the radio.

102:19:01 Stafford (in Snoopy): It’s weird, isn’t it?

102:19:03 Cernan (in Snoopy): Isn’t that weird?

102:19:11 Stafford (in Snoopy): I think that’s a side lobe.

102:19:15 Cernan (in Snoopy): Is it? Huh?

102:19:17 Stafford (in Snoopy): Yep.

And there you go. Later analysis confirmed the cause to be interference between the VHF radio gear on the two spacecraft. The great mysterious “space music,” which according to “News” reports was “classified till 2008” was just the rendezvous radar leaking into the radio spectrum. You know, my college radio station had sideband leakage into the shortwave bands, and even though our transmission was FM, we once got a letter from a guy 600 miles away in Illinois saying he listened on shortwave (AM).

I’m not sure where this “classified” recording would have come from. Apollo uses a special recorder to store voice and instrument data for compressed transmission back to earth. The recordings were transcribed back in the ’70s, and stuck in a warehouse somewere. The have been out on the Internet for a few years, but there is no good index and the recordings are raw. Crew voices are often inaudible beneath the thrum of the instrument signal data. It’s possible someone went looking for the “music” and was able to extract it from the background noise. It would not be surprising if it survived, given that it was heard over the radio by both the CSM and LEM.

At any rate, it wasn’t little green DJ’s playing “Space Music.” It was interference from the rendezvous radar other radio emmissions from the two spacecraft, and the (rather obvious) testement to that fact is the crew’s reaction: Hey what’s that? The Radio. Great, want some juice.

As if going to the freakin moon isn’t entertaining enough.

Geez.

Help for a Moon Hoax Fence Sitter

Someone recently asserted that “his dad” said th moon landings couldn’t be real because blah, blah, blah and that’s impossible, to which I responded with reality. The questioner that came back with these followups:

“What was the radiant barrier [that keeps spacecraft cool] made of?” Several layers of aluminized Mylar (the same stuff that is now used in attics) over a “superinsulation” of alternating layers of Kapton and glass-fiber cloth.

“Water cooled, [referring to spacesuit thermal control undergarments] that must have weighted a lot” No. Tiny plastic tubes filled with glycol and water were sewn to a mesh garment worn over the permanent waer garment, so one layer over the underwear. The purpose was mostly to remove the astronaut’s body heat. The suit reflected much of the sun’s heat and the remaining extremes between the sunlit and shadow sides canceled each other out. Movement, air circulation, and the water garment ensured no hot or cold spots. Thermo regulation was absolutely not a problem..

“If I remember correctly, the suits were at 250 F which is 121 C, at 100 C water boils, so the air inside the suit, when reaching 100 C would make the body of the astronauts burn and the blood boil.” No, dark surfaces would have heated up, but the white suit and reflective visor, combined with insulation, prevented the surface from getting so hot and prevented the heat from reaching the astronaut. Air entering the suit was cold anyway, because it was stored under pressure. The was not a problem. Firefighting gear has it far, far harder.

“Since they were in low pressure inside the suits, they would have boiled at even less temperature.” Yes they would, at about 170 F, but that was never going to happen.

“And cooling that water would be really hard.” No, cooling that water was simplicity itself. When they were in the shade or resting they didn’t need to cool it much at all. Gemini suits had no water cooled undergarment at all, and they worked just fine until the astronauts started doing physical work. In the A7 suits used by Apollo, when they we in the sun for a while or getting hot, a porous plate sublimator was used to cool a heat exchanger, which cooled the glycol loop. The Astronaut could control how much of the glycol went through the heat exchanger soas to avoid overcooling. This method is still used today, and was used for supplemental cooling on the LEM as well.

“Handling half a tank of water in the tank would make a pretty unstable astronaut” Good thinking! Naturally, the engineers thought of that. Water for the sublimator was stored in two flexible bladders, a primary holding about a gallon and a secondary holding about half that much. This were no more problem than today’s CamelBak packs. Really, the inertia of the entire PLSS pack was more of an issue than water slosh.

“Since they were in space, I suppose those are psi absolute, which would mean about 1/3 of the pressure at sea level.” Correct. Apollo spacesuits were pressurized to 5.5 psi of pure oxygen.

“Bizarre that they would use only oxygen given Gus Grissom’s death because of that in 1967.” Not at all. They still use pure oxygen in suits to this day. The reason is that inflating to 14.7 PSI would cause the suits to balloon and make flexing the joints too hard for the wearer, and adding nitrogen to the mix would make the life support pack far more complicated, prone to failure, and tricky to operate. Fire is no more a risk at 5.5PSI and 100% O2 than normal air at sea level. The Apollo 1 pad fire was caused by procedural oversights that led to the cabin being filled with more than sea level pressure of pure O2—a very bad idea. Also, suits are carefully constructed to prevent any source of sparks, and the astronaut can’t exactly forget and light up a stogie.

Hamilton standard’s tests showed that a man can live on pure O2 down to 3.7PSI–provided it’s all oxygen.

“If they weighted 1/6 of earth gravity they would have been able to kick a ball and put it into orbit.” No they wouldn’t. The minimum speed for lunar orbit is well over 2km per second.

“Without atmosphere and with an escape velocity of just 2 m/s, even an astronaut jumping would have been able to put himself into orbit,” No, because we are talking about the moon, where the escape velocity is 2.38 THOUSAND m/s. Even if your astronauts brought a clown cannon, they aren’t entering orbit.

“all the recorded videos and photos show the moon as having its horizon between 100 and 200 m” No they don’t. The horizon on the moon is about 2 kilometers away if you are standing on a plain, and that’s what all the photos show, but there is nothing to give a visual sense of scale.You can’t tell how far away a lunar mountain is without looking at a map. Jack Schmitt took this telephoto image of the Apollo 17 LEM from a rise 3 km away, with mountains in the background:

luna16

Or consider this shot of Apollo 15 from its ALSEP site, which all by itself it about 100 meters away:

as15-82-11054 thru as15-82-11058

Or maybe you mean like this shot of Pete Conrad inspecting the Surveyor 3 probe that landed two years before he did, with the LM in the distance (note the big antenna used to improve TV reception back on earth.)

stou_s12

And lest you are concerned by the lack of a crater beneath the probe—like Apollo, it was designed to cut off the engine early to avoid disturbing the soil it was sent to sample. It malfunctioned, and ended up bouncing 35 feet in the air, no worse for wear.

“A normal person would have recorded around himself…that is what we do when we explore, naturally, we go up and take a look.” Yeah, they did that. I believe it was Apollo 12 in which the commander opened the docking hatch first, then stood up to survey the landing site before going down through the door to the surface. Every major site of every surface mission produced at least one panoramic photo.

“wouldn’t it be normal for astronauts to record the stuff they left on the moon as they take off? You mean turn around and take a picture as they were lifting off? You mean like this movie frame from the Apollo 14 liftoff?

ap14-s71-19500

Why is the Moon Receding?

When the Apollo astronauts set down on the moon, they didn’t just plant the flag and take a selfie–they had science to do.

One of the experiments left by Apollo was a laser range finding experiment. By means of high quality retro-reflectors left by Apollo and two Soviet Lunakod missions, we now know that the moon is receding by nearly 4 cm per year. We also know our day is slowing down. So what gives?

The moon’s gravity constantly creates a bulge in the Earth, mostly in our oceans. But our daily rotation constantly carries that bulge eastward. The moon must then constantly pull it back toward itself–and the bulge constantly pulls the moon forward in its orbit. This has the effect of slowing our rotation and accelerating the moon’s orbit.

https://mlpforums.com/uploads/post_images/img-633502-1-tidalbraking.jpeg

 

When the moon formed, both it and Earth revolved much more quickly than today. The Earth probably had something like a six hour day, and the moon? We don’t know how long its day was, but it was much closer then, less than a tenth its current distance, and both the Earth and its moon were partly molten, which means the tides were vastly greater than today (today, 90% of the tidal bulge is in our oceans) –and therefore this process of recession and slowing operated much, much faster. The moon’s rotation slowed until its rotational and orbital period were in sync, and then its bulge faced Earth and it became locked.

Looking at the diagram, you might notice that there are actually two bulges, one on either side of the Earth. This is true, but since gravity weakens with distance, the bulge nearer the moon is substantially larger and interacts more strongly with the moon than the farther one. For purposes of understanding, we can treat the system is if there were only a single, smaller bulge on the moon’s side.

All moons that orbit in the same direction their planet spins undergo this same process. How long it takes them to become locked depends on the orbital distance and speed and the composition of the two bodies. Liquid bodies naturally have much large tidal bulges than solid ones, and so feel the change more strongly.

Don’t worry. Although the moon is now almost a foot farther away that it was when we first set foot on it, it’s not going anywhere. The recession is slow enough, the sun will die before the moon can get away.

 

That We May Have Wings

Thirty years ago today, I stepped up to get a hamburger and saw this on TV:ap8601281739

Two weeks before this, I had mentioned to my mother that I read a NASA report in our school depository library saying that solid rockets were not suitable for manned spaceflight because they could not be aborted and had too high a failure rate.

Six months later, we learned that the accident had been caused by leaky seals between solid rocket booster segments. The SRBs had been choosen for political reasons, to keep work flowing to the manufacturer and ensure the support of its state representatives. The danger of flying these boosters in cold weather was known, and urgent please from the engineers had been suppressed–for political reasons.

A tragedy, to be sure. The more tragic because it could easily have been prevented.

A tragedy made far, far worse by what happened eight years later, when the Space Shuttle Columbia was lost after suffering damage to its thermal protection system ceramic tiles at liftoff:

columbia_ap_promo

Nobel Lareat, Richard Feynman described the root cause of the Challenger disaster thusly (the same exact cause was at the heart of the Columbia loss)”

“They are warnings that something is wrong. The equipment is not operating as expected, and therefore there is a danger that it can operate with even wider deviations in this unexpected and not thoroughly understood way. The fact that this danger did not lead to a catastrophe before is no guarantee that it will not the next time, unless it is completely understood. When playing Russian roulette the fact that the first shot got off safely is little comfort for the next. … In spite of these variations from case to case, officials behaved as if they understood it, giving apparently logical arguments to each other often depending on the “success” of previous flights.”

Feynman was right. Absolutely right. Chillingly right. And his conclusions speak to us all, everyday, and everything we do. The stakes are not always life and death, but the lesson is alwars the same. “Common sense” evolves on the African Savanna. It is no substitute for empirical evidence, scientific rigor, and tested understanding. When we deviate from these proven tool, we tread on broken ice.

As American, as humans, we owe it to the 14 men and women lost to these two disasters to take this lesson to heart. Not merely to patch a few procedures as NASA, but to embrace as a culture this reality: Science is how you know things. Anything else is guesswork.

 

 

Of Space and Pens

The story goes that NASA spent millions of dollars developing a high-tech space pen while the more practical Russians just used a pencil.

Only it isn’t true. At all. 1838a

During the first NASA missions, US astronauts used pencils. For  Project Gemini, for example, NASA ordered mechanical pencils in 1965 from Tycam Engineering Manufacturing, Inc., in Houston. The fixed price contract purchased 34 units at a total cost of $4,382.50, or $128.89 per unit. That created something of a stink, as many  people believed it was a frivolous expense. NASA backtracked immediately and equipped the astronauts with less costly items.

During this time period, Paul C. Fisher of the Fisher Pen Co.  designed a ballpoint pen that would operate better in the unique  environment of space. His new pen, with a pressurized ink cartridge,  functioned in a weightless environment, underwater, in other liquids, and in temperature extremes ranging from -50 F to +400 F.  He developed his pen with no NASA funding, at a reported cost of $1 million–then  patented the pen and cornered the market as a result.

Fisher offered the pens to NASA in 1965, but, because of the  earlier controversy, the agency was hesitant in its approach. In 1967,  after rigorous tests, NASA managers agreed to equip the Apollo  astronauts with these pens. NASA purchased 400 pens at $6 per unit for Project Apollo.

The Soviet Union also purchased 100 of the Fisher pens and 1,000  ink cartridges in February 1969, for use on its Soyuz space flights.  Previously, its cosmonauts had been using grease pencils to write in  orbit.  Both American astronauts and Soviet/Russian cosmonauts have continued to use these pens.

I use them too. They are great for autographs and won’t leak or go dry when left for months in a car. Of course, the price has gone up.

 

Why Did Apollo Space Suits Have External Hoses?

Someone recently asked: Weren’t the external hoses on the Apollo astronauts’ space suits a risk?

Excellent question. Yes, they were a risk, but an easily managed one with huge benefits.

  1. First, the risk of damage was managed by:
    1. Enclosing the tubes inside braided stainless steel as is done today in better plumbing supply hoses. That, in addition to a multi-layer insulation and abrasion wrap made them pretty snug.
    2. Providing the astronauts with spare hoses.
  2. Second, using the hoses made it easy to:
    1. Decouple the suit and the PLSS–even during an EVA–in case of emergency, or in case of entrapment.
    2. Recharge, clean, and service the suits and life support (PLSS) packs.
    3. Connect the same (multi-million dollar) suits to the space craft interior life support console for use during dangerous maneuvers (like liftoff and reentry).
    4. Buddy breathe off another astronaut’s suit in case of damage or failure of a PLSS.
    5. Use the same (multi-million dollar) spacesuit for tethered EVAs using a long umbilical connected the the life support console inside the spacecraft.
apollo_17_astronaut_ronald_e-_evans_performs_an_eva_to_retrieve_film_cassettes_during_the_trans-earth_coast

Apollo 17 Command Module Pilot, Ron Evans, performing an EVA to retrieve films shot from an experiment rack. Note that he is wearing the backup emergency life support pack, but no larger primary pack. Instead, both the emergency pack and a long umbilical connect to the suit connectors.

What do you think? Did the gains outweigh the costs? Please rate and leave a comment and let me know. And if you liked this post, you’ll love my upcoming story in Analog Science Fiction and Fact. Pop over to www.cSuartHardwick.com for a free signed e-sampler of award-winning scifi.