Explanation of why pencils are not used aboard spacecraft.

Jan 11, 2018 1:43 PM

TheDaharMaster

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Send me nothing. I'm not bored.

Buzz Aldrin used a Flair felt-tip.

8 years ago | Likes 1 Dislikes 0

I’m changing my username to snidemoron. I will be an Imgur GOD!

8 years ago | Likes 2 Dislikes 1

Only if you promise to carefully post only falsehood.

8 years ago | Likes 1 Dislikes 0

I actually met Alan Bean on a flight to Amarillo. Got him to sign one of his cards with my coworkers space pen. I got one now too.

8 years ago | Likes 1 Dislikes 0

Pretty sure you can only say "snigga"

8 years ago | Likes 3 Dislikes 0

Is this something Chris Hadfield ever debunked one way or the other?

8 years ago | Likes 1 Dislikes 0

Use a black colour pencil.

8 years ago | Likes 4 Dislikes 3

Crayola crayons would have worked, duh.

8 years ago | Likes 2 Dislikes 1

Yeah, the Russians didn't learn graphite was bad until 1986. (Chernobyl had a graphite-moderated reactor.)

8 years ago | Likes 1 Dislikes 0

Hooray for knowledge!

8 years ago | Likes 3 Dislikes 0

Is the one about Russia drilling a hole through an American drill bit true? Please say it is...please.

8 years ago | Likes 1 Dislikes 0

Motherfuckers could have used crayons...

8 years ago | Likes 1 Dislikes 0

"In 1980, everyone was on fire! I did not know that." -Peter griffin

8 years ago | Likes 1 Dislikes 0

I have a fisher space pen that I bought from Johnson Space Center on my desk. I use it every day. It was 12 fuckin dollars.

8 years ago | Likes 1 Dislikes 0

i have had a fisher space pen for about 20 years now and the thing is still going strong

8 years ago | Likes 1 Dislikes 0

Graphite is only conductive in two dimensions, because it’s a plane.

8 years ago | Likes 1 Dislikes 0

Can we just stop posting this one.

8 years ago | Likes 5 Dislikes 3

Maybe once people stop bitching about NASA/space exploration, posts like this won't be necessary..

8 years ago | Likes 1 Dislikes 0

I thought that too, but then I noticed the top comment is a TIL, so I guess it's still worth sharing after all.

8 years ago | Likes 7 Dislikes 0

I give Fisher space pens as gifts. Still have both mine. Use them all the time and love em!

8 years ago | Likes 1 Dislikes 0

But what about a grease pencil?

8 years ago | Likes 2 Dislikes 0

can't just let professionals work with crayons in SPACE!

8 years ago | Likes 6 Dislikes 0

I'm a Marine. You don't want to give us another thing to eat.

8 years ago | Likes 4 Dislikes 0

The paper bits when you "shsrpen" it may be problematic.

8 years ago | Likes 7 Dislikes 0

It's the sandwich debacle all over again

8 years ago | Likes 1 Dislikes 0

ok so who is Fisher?

8 years ago | Likes 1 Dislikes 0

That's why I bought a legit Fisher pen because they are the titssssss

8 years ago | Likes 1 Dislikes 0

This is an oldie, but goodie, Robin William's joke is a joke, and I love the explanation.

8 years ago | Likes 64 Dislikes 4

Why was so much money put into ballpoint? Literally just make it a little wider and use an airtight spot with a spring pushing on it.

8 years ago | Likes 1 Dislikes 0

TIL, thanks!

8 years ago | Likes 380 Dislikes 2

now both russia and nasa use felt pens.

8 years ago | Likes 1 Dislikes 0

Honestly, as long as this is still new information for someone, I guess I'm glad it keeps getting reposted every few months. (not sarcastic)

8 years ago | Likes 18 Dislikes 0

I mean it writes upside down, worth every pen-ny

8 years ago | Likes 16 Dislikes 2

Crayons boy

8 years ago | Likes 412 Dislikes 5

yes please

8 years ago | Likes 1 Dislikes 0

Boi

8 years ago | Likes 1 Dislikes 0

Are very flamable. Light 1

8 years ago | Likes 30 Dislikes 1

too melty!

8 years ago | Likes 2 Dislikes 0

Same problem but with wax instead of graphite

8 years ago | Likes 51 Dislikes 8

Not the same problems. But similar, equally bad ones.

8 years ago | Likes 9 Dislikes 0

Since when is wax conductive?

8 years ago | Likes 43 Dislikes 3

It's not, but it will clog air filtration and similar systems.

8 years ago | Likes 8 Dislikes 0

Flammable. See the "light a candle without touching the wick after blowing it out" trick.

8 years ago | Likes 3 Dislikes 0

In small enough amounts, everything is conductive.

8 years ago | Likes 2 Dislikes 1

With enough voltage everything is a conductor.

8 years ago | Likes 1 Dislikes 0

Couldn't you just replace graphite with something that behaved similar except isn't conductive?

8 years ago | Likes 5 Dislikes 3

Yeah, I was thinking of those wax pencils kids uses, but firmer/thinner.

8 years ago | Likes 2 Dislikes 0

Like, a pen?

8 years ago | Likes 4 Dislikes 0

Like ... a pen?

8 years ago | Likes 8 Dislikes 0

Was thinking more like a low conductivity clay binder mixed with dye.

8 years ago | Likes 3 Dislikes 1

A crayon?

8 years ago | Likes 1 Dislikes 0

Or a pen.

8 years ago | Likes 3 Dislikes 0

They dont use pure oxygen, its explosive and an entire crew died in a fire that way. Still good point

8 years ago | Likes 20 Dislikes 6

Oxygen isn’t explosive. It is accelerant. Makes other stuff more flammable.

8 years ago | Likes 1 Dislikes 0

It is still used in spacesuits, otherwise astronauts would get the bends, and astronauts going on a space walk have to spend a day on the1/2

8 years ago | Likes 3 Dislikes 0

Airlock's nitrogen poor environment to get it out of their system source:https://en.m.wikipedia.org/wiki/Quest_Joint_Airlock

8 years ago | Likes 2 Dislikes 0

It's also to allow 1/3 atmosphere pressure in suits. Full sea level pressure would make the joint immobile.

8 years ago | Likes 3 Dislikes 0

They did before the apollo 1 fire.

8 years ago | Likes 8 Dislikes 0

They still did, but used air during launch switching to pure oxygen later to reduce pressure to a 1/3rd.

8 years ago | Likes 4 Dislikes 0

That's literally what the text says. Do you even read, bro?

8 years ago | Likes 6 Dislikes 21

The text literally says "pure oxygen environment of a capsule". Do you even read, bro?

8 years ago | Likes 12 Dislikes 3

AND WHAT THE FUCK DOES IT SAY RIGHT AFTER THAT??? "AFTER THE FIRE IN APOLLO 1" WHICH IS INFAMOUS BECAUSE OF THE FIRE IN PURE OXYGEN CAPSULE

8 years ago | Likes 4 Dislikes 20

Relax and try to let your brain work. Re-read that guy's comment. He's pointing out the fact that it's NOT a pure oxygen environment.

8 years ago | Likes 8 Dislikes 2

I think he meant, "They don't use pure oxygen ANYMORE."

8 years ago | Likes 5 Dislikes 1

“Snide morons on the internet never know what they are talking about.” - hallelujah brother! Say it again!

8 years ago | Likes 237 Dislikes 2

It

8 years ago | Likes 2 Dislikes 0

Louder for the people in the back!

8 years ago | Likes 5 Dislikes 0

“Snide morons on the internet never know what they are talking about.” - hallelujah brother! Say it again!

8 years ago | Likes 4 Dislikes 1

Snide morons on the internet never know what they are talking about.

8 years ago | Likes 42 Dislikes 0

Hallelujah brother. Say it again!

8 years ago | Likes 19 Dislikes 0

Snide morons on the internet never know what they are talking about.

8 years ago | Likes 17 Dislikes 0

Okay. We have said it enough times. Thanks. :)

8 years ago | Likes 2 Dislikes 0

No.

8 years ago | Likes 9 Dislikes 6

8 years ago | Likes 12 Dislikes 0

Floating graphite powder around insanely complex circuits is probably not a good idea.

8 years ago | Likes 345 Dislikes 38

They weren't all that complex.

8 years ago | Likes 3 Dislikes 3

As a snide Internet Moron, pencils are harmless in space!

8 years ago | Likes 2 Dislikes 0

Yeah that's literally what it just said

8 years ago | Likes 32 Dislikes 1

Russians used softer pencils, the kind that artists use to create a smudge effect.

8 years ago | Likes 5 Dislikes 2

Smudged or not, you still get dusted graphite floating around.

8 years ago | Likes 1 Dislikes 0

Grease pencils. And those had problems too. because they smudge.

8 years ago | Likes 10 Dislikes 0

"So, readings of capsule of into space say: 46, ... 56? Nyet, 66! Or... Cyka blyat, Ivan, readings table looks like it's full of semetshki!"

8 years ago | Likes 3 Dislikes 0

I suppose that is why they switched to the pen?

8 years ago | Likes 1 Dislikes 0

They weren’t as complicated as you imagine. No microchips or anything. Keep in mind they’d have been astonished by the inside of an Atari.

8 years ago | Likes 5 Dislikes 0

It doesnt have to be a microchip to be complicated or easily compromised by graphite.

8 years ago | Likes 1 Dislikes 0

The components have to be close enough together for a graphite flake to bridge the gap, pre-chip makes that less common

8 years ago | Likes 1 Dislikes 0

Thing is, space capsules are hardly "insanely complex circuits". The moon lander had less calculating power than a current TI calculator

8 years ago | Likes 6 Dislikes 78

Have you ever seen an Apollo capsule? They may not have been powerful, but damn were they extremely complicated machines

8 years ago | Likes 14 Dislikes 0

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8 years ago (deleted Dec 4, 2022 5:46 PM) | Likes 0 Dislikes 0

Probably slower too. Ever see them old dude work a slide rule? Like math ninjas!

8 years ago | Likes 2 Dislikes 1

And was designed to land on the moon, an unparalleled feat at the time. Power != complexity.

8 years ago | Likes 10 Dislikes 0

Which probably made them more susceptible to reliability risks.

8 years ago | Likes 4 Dislikes 0

And that was all contained in a large complex space, full of exposed conductive material and wires

8 years ago | Likes 1 Dislikes 0

Hardware strength really has nothing to do with the effects of powdered graphite near critical system circuitry

8 years ago | Likes 6 Dislikes 0

8 years ago | Likes 2 Dislikes 0

Why is this getting downvoted to oblivion? He's right!

8 years ago | Likes 1 Dislikes 1

Well, the circuits are complex, but the computers that ran them were not, by todays standards.

8 years ago | Likes 1 Dislikes 0

"...the command module panels included 24 instruments, 566 switches, 40 event indicators, and 71 lights"

8 years ago | Likes 24 Dislikes 0

They had at least 15 MILES of wire, and up to 30 miles on later missions

8 years ago | Likes 14 Dislikes 0

Even though you're wrong, what happens when some graphite creates a short and that shit stops working...

8 years ago | Likes 2 Dislikes 0

Maybe you die. Maybe a fire. Maybe a fire then you die.

8 years ago | Likes 1 Dislikes 1

Oh god oh god we're all gonna die? https://www.youtube.com/watch?v=PBEUQSpRvSI

8 years ago | Likes 1 Dislikes 0

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[deleted]

8 years ago (deleted Jan 13, 2018 4:36 PM) | Likes 0 Dislikes 0

R u calling them snide morons?

8 years ago | Likes 1 Dislikes 2

8 years ago | Likes 4 Dislikes 0

Damn. Got your graphite powder all over his circuits.

8 years ago | Likes 2 Dislikes 0

v

8 years ago | Likes 2 Dislikes 0

Headshot!

8 years ago | Likes 7 Dislikes 0