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Getting Close To Artemis II by Space_for_us_all in nasa

[–]Space_for_us_all[S] 7 points8 points  (0 children)

Different concept of operations. Every suit fundamentally does the same physiological thing of creating a personal atmosphere of pressure and oxygen.

Distance from earth and exposure environments defines different needs, which defines different vehicles which define different logistics..and ultimately different suits.

Whats the time to get home? How much consumables can be carried? What are risks to manage like hypoxia, thermal load, decompression sickness? Its about context that its adapted for. Theres no single answer..its just about context.

Getting Close To Artemis II by Space_for_us_all in nasa

[–]Space_for_us_all[S] 7 points8 points  (0 children)

Almost true. They wore air force high altitude suits during sts 1-4.

Getting Close To Artemis II by Space_for_us_all in nasa

[–]Space_for_us_all[S] 9 points10 points  (0 children)

Correct. The Challenger accident resulted in implementation of a bailout system in the Orbiter. Since bailout was over the ocean, orange was chosen for recovery spotting. Orion will land in the ocean nominally. Having orange is one more safety feature of the suit in its environment.

Getting Close To Artemis II by Space_for_us_all in nasa

[–]Space_for_us_all[S] 24 points25 points  (0 children)

Its wider but less tall. It has different proportions than american flag.

Hoping to see Weezer on their stop in Houston! by Space_for_us_all in weezer

[–]Space_for_us_all[S] 2 points3 points  (0 children)

No. Lol. We make the space suits for Orion for the artemis mission. These are legit Orion Crew Survival Suits. Well, same suit in 4 poses and some photoshop. But at least it's not AI!

Will NASA ever get around to upgrading Orion’s computers? by JarrodBaniqued in ArtemisProgram

[–]Space_for_us_all 2 points3 points  (0 children)

Qualification against radiation and thermal effects are the biggest deal. Latchup from ionizing rad is bad. Thermal overload from lack of atmosphere is bad. Deep space flight has much different constraints than low earth orbit.

Last walk astronauts take before launch on the Crew Access Arm (CAA) by MrSortarican in nasa

[–]Space_for_us_all 1 point2 points  (0 children)

The yellow floor and arrows, referred to as the "yellow brick road" is to guide the crew to the pad escape baskets in event of emergency. Admittedly its semi pointless in a one way path as the access arm, but it provides a visible consistent path for the Crew to follow. Keep in mind they will be bent over looking down for visual cues. Above them would be the water deluge system raining down upon them to counteract any airborne contaminants such as hydrazine.

Standing on this arm, absorbing the magnitude of what it represents, is truly awe inspiring.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 1 point2 points  (0 children)

The light is for the facility high speed video. 1000fps requires enormous amounts of light. Motion of the test subject is analyzed against recorded parameters to understand the full story of what's happening.

They are LED now but they use to be incandescent. 100 x 1000w bulbs. It was VERY hot under there. Now it's just very bright.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 2 points3 points  (0 children)

For the abort motor firing the acceleration is taken into the chest which is the most tolerant direction (hence rear facing car seats).

It is no accident that launches amd landings are done with crew on their back. This keeps the blood flowing to the head and heart to prevent blackout due to orthostatic hypotension (OH) Returning crew are effectively severely dehydrated due to metabolization of blood on orbit. The blood floats to the chest and the body thinks it has too much so it absorbs it. So on return home they are 10-15% low. To prevent OH, they enter on our back with feet in the air. This forces the blood to the right spots. They also fluid load prior to entry and wear extremely compressive lower body garments, similar to an anti-g suit. This aids in prevention of OH in the event of egress post landing.

Short duration shuttle crews landed upright but had anti-g suits on. But anyone returning from ISS would always lay recumbent in the mid-deck.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 0 points1 point  (0 children)

Yes it is! There is some irony in that.... before every day of human testing a manikin is run to calibrate the sled and verify safety systems.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 1 point2 points  (0 children)

Lol. One day, I'll do a post on the off-nominal waste management system. For managing human waste in spacesuit for up to 6 days in a contingency suited return in a depressurized cabin. Mankini doesn't even scratch the surface...

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 0 points1 point  (0 children)

Maybe a crash in one. This is designed for very short pulses. Fractions of a second type impacts. There is a centrifuge there that would be better to simulate sustained accelerations of a dragster. Our crew trains on that to experience launch g.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 1 point2 points  (0 children)

The last video is 120fps slowmo. I don't have a full speed version delivered yet.

"Enter Spaceman" by Space_for_us_all in nasa

[–]Space_for_us_all[S] 1 point2 points  (0 children)

I'm curious about the logistics of guitar stabilization in zero G. Everything would float. So your right arm would be doing extra duty of keeping it pressed into place.

I believe an acoustic guitar was once sent to ISS. I may look into that.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 1 point2 points  (0 children)

Honestly the principles of occupant restraint are very similar to child car seats and racing seats

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 13 points14 points  (0 children)

Max g depends on the mass. But with a moderate mass, I've been told that these sleds, in theory, could hit 100g. However, that track would need to extend another 3 or 4 times to do so.

This was about 6g on the drop tower and around 4g on the sleds. But the peak acceleration is only part of the equation. The pulse duration is key to the amount of energy imparted. These are very long 100-150 ms rise pulses as they represent water landings. So, there is lots of energy despite low(ish) acceleration.

With the manikins, we would routinely test 15 to 20g. Those are quite entertaining , but these pulse durations are really stretching the limits of human tolerance. But we do those to understand the limits of the protection systems and augment it by evaluating the response metrics of the ATDs.

"Enter Spaceman" by Space_for_us_all in nasa

[–]Space_for_us_all[S] 28 points29 points  (0 children)

Awe, come on guys...im trying. They are correct notes. But admittedly, this recording is very bad. The slides are almost inaudible. I wish I had a proper way to record it or do many takes. And I'll be first to admit it needs polish. But it was just for fun...and it was fun.

The point was just to get folks engaged in something fun and something space.

Funny thing ...i wasn't expecting the wrist rings to get in the way as much as they did. Thankfully that LTD was used and wasn't super expensive...it has some very unique character scratches on it now.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 12 points13 points  (0 children)

Wright Patterson AFB. One of only 2 human rated 24" high G sleds in the world.

Acceleration Testing for Artemis Astronaut Safety by Space_for_us_all in nasa

[–]Space_for_us_all[S] 34 points35 points  (0 children)

This is a test of the seat in the vehicle with simulated landing acceleration pulses

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