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Artemis II's toilet is a moon mission milestone

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Re: Artemis II's toilet is a moon mission milestone

#171
post #160

Earlier quoted context omitted.

I wonder if hunger can affect your focus and reflexes though.

If missing a meal causes that, I suspect we would have died out as a species long ago.

The context is piloting a fighter aircraft in a multi-hour combat mission though. I think missing meal might matter for mission critical, uh, missions.

I'm not talking doing menial work while skipping lunch.

Re: Artemis II's toilet is a moon mission milestone

#172
post #171

Earlier quoted context omitted.

If missing a meal causes that, I suspect we would have died out as a species long ago.

The context is piloting a fighter aircraft in a multi-hour combat mission though. I think missing meal might matter for mission critical, uh, missions. I'm not talking doing menial work while skipping lunch.

A full gut makes you sleepy and lethargic, as the blood moves to your gut to help digest. There's a reason many societies have a siesta after lunch.

A full belly can causes problem if you get wounded.

Besides, I doubt our ancestors went on the hunt with full bellies. I go jogging, but never after a meal.

If I'm busy, I also do not notice being hungry, even if I haven't eaten in 16+ hours.

One more thing. I hitched a ride with autocross racer. While I was strapped in tight, when he'd make a hard turn my guts would slosh over to the side, which was rather painful. The fix was to bear down hard on my abdominal muscles. I expect it would be much worse with a full belly, and a fighter pilot is going to be pulling lots of g's.

Re: Artemis II's toilet is a moon mission milestone

#173
post #171

Earlier quoted context omitted.

The context is piloting a fighter aircraft in a multi-hour combat mission though. I think missing meal might matter for mission critical, uh, missions. I'm not talking doing menial work while skipping lunch.

A full gut makes you sleepy and lethargic, as the blood moves to your gut to help digest. There's a reason many societies have a siesta after lunch. A full belly can causes problem if you get wounded. Besides, I doubt our ancestors went on the hunt with full bellies. I go jogging, but never after a meal. If I'm busy, I also do not notice being hungry, even if I haven't eaten in 16+ hours. One more thing. I hitched a…

Oh, believe me, I know about the need for siestas.

But surely there's a middle ground between "heavy lunch" and "skipping lunch entirely" for a multi hour combat sortie?

Many people cannot focus (especially over long periods of time) on an empty stomach.

> If I'm busy, I also do not notice being hungry, even if I haven't eaten in 16+ hours.

Combat sorties are hours of boredom where you have to keep attention just in case, followed by an explosion of frantic action. Unless you're a combat pilot I'd say your experience doesn't apply here?

Re: Artemis II's toilet is a moon mission milestone

#174
post #173

Earlier quoted context omitted.

A full gut makes you sleepy and lethargic, as the blood moves to your gut to help digest. There's a reason many societies have a siesta after lunch. A full belly can causes problem if you get wounded. Besides, I doubt our ancestors went on the hunt with full bellies. I go jogging, but never after a meal. If I'm busy, I also do not notice being hungry, even if I haven't eaten in 16+ hours. One more thing. I hitched a…

Oh, believe me, I know about the need for siestas. But surely there's a middle ground between "heavy lunch" and "skipping lunch entirely" for a multi hour combat sortie? Many people cannot focus (especially over long periods of time) on an empty stomach. > If I'm busy, I also do not notice being hungry, even if I haven't eaten in 16+ hours. Combat sorties are hours of boredom where you have to keep attention just in…

I'm not a combat pilot, but my dad was. Flying over enemy territory requires constant alertness, for many hours at a stretch. You can be attacked at any time, by flak or enemy fighters, who love to catch an enemy napping.

A favorite Luftwaffe tactic was to come up from behind, catch the tailgunner unawares, and rake it with cannon fire and get an easy kill. If the tailgunner was awake, he'd fire a few rounds of tracers (while out of range) to let the 109 know he was on the bounce, and the 109 would usually back off.

His cohort suffered 80% casualties.

> Many people

are not fit to be combat pilots. The AF is very selective. (I didn't qualify, as I wear glasses.) They work hard to weed out slackers, people of low intelligence, sloppy people, unhealthy people, dishonest people, etc. They'll even reject you for a speeding ticket.

Re: Artemis II's toilet is a moon mission milestone

#175
post #173

Earlier quoted context omitted.

Oh, believe me, I know about the need for siestas. But surely there's a middle ground between "heavy lunch" and "skipping lunch entirely" for a multi hour combat sortie? Many people cannot focus (especially over long periods of time) on an empty stomach. > If I'm busy, I also do not notice being hungry, even if I haven't eaten in 16+ hours. Combat sorties are hours of boredom where you have to keep attention just in…

I'm not a combat pilot, but my dad was. Flying over enemy territory requires constant alertness, for many hours at a stretch. You can be attacked at any time, by flak or enemy fighters, who love to catch an enemy napping. A favorite Luftwaffe tactic was to come up from behind, catch the tailgunner unawares, and rake it with cannon fire and get an easy kill. If the tailgunner was awake, he'd fire a few rounds of trace…

First, thanks for sharing your dad's experience! Very interesting.

I did say I thought it required constant alertness... over long periods of boredom, a bad combination. It's hours of nothing punctuated by frantic action. Worse to be keeping a watchful eye on a completely empty stomach, I'd say. Happy to be contradicted if your dad told you he flew long combat missions on an empty stomach...

I also think long combat flights with aerial refueling are longer now than in the WW2 era, right? Excluding maybe bombers, but surely bombers did have toilets, even if minimalistic?

> [many people] are not fit to be combat pilots. The AF is very selective.

I'm sure of this, but we're discussing a very specific thing. The other person who replied to my topmost comment, who also seems to be speaking from experience, assured me pilots don't select on this particular basis. In fact, this person said fighter pilots do shit themselves and earn nicknames because of it.

Re: Artemis II's toilet is a moon mission milestone

#176

Earlier quoted context omitted.

buoyancy only applies in gravity. The buoyant force on an object is equal to and opposite of the weight of the displaced fluid. No gravity, no weight.

The goal here is neutral buoyancy when in gravity so that it behaves as though there were no gravity. Put a bag of water in water and it floats like the rest of the water, gravity or no.

So you’re strapping yourself into a material with the same density as poop and then pooping into it? How is that cleaner than pooping in a bag or over a vacuum?

Re: Artemis II's toilet is a moon mission milestone

#177
post #175

Earlier quoted context omitted.

I'm not a combat pilot, but my dad was. Flying over enemy territory requires constant alertness, for many hours at a stretch. You can be attacked at any time, by flak or enemy fighters, who love to catch an enemy napping. A favorite Luftwaffe tactic was to come up from behind, catch the tailgunner unawares, and rake it with cannon fire and get an easy kill. If the tailgunner was awake, he'd fire a few rounds of trace…

First, thanks for sharing your dad's experience! Very interesting. I did say I thought it required constant alertness... over long periods of boredom, a bad combination. It's hours of nothing punctuated by frantic action. Worse to be keeping a watchful eye on a completely empty stomach, I'd say. Happy to be contradicted if your dad told you he flew long combat missions on an empty stomach... I also think long combat…

I'd certainly ask my dad, and if he were around he'd be 104!

I once went parachute jumping. I did not eat beforehand (and we were advised not to!).

Re: Artemis II's toilet is a moon mission milestone

#178
post #160

Earlier quoted context omitted.

I wonder if hunger can affect your focus and reflexes though.

If missing a meal causes that, I suspect we would have died out as a species long ago.

spurous reasoning because it relies on performance being a binary thing and not a gradiant.

Re: Artemis II's toilet is a moon mission milestone

#179

Earlier quoted context omitted.

Apollo was largely driven with the purpose of achieving the goal rather than obsessing on the details on the way to that goal. In fact during Apollo they even completely scrapped mathematical risk modeling because the results it always gave were basically 'you die.' So for instance a relevant and famous anecdote is that the original tests for Apollo launches didn't have any sort of urine/fecal disposal systems at all…

People joke about "safety third" but I've always thought that was literally about right. It's a higher priority than many other considerations, but it's no way the highest priority. Doing or having something at all absolutely comes before having it in safety and comfort.

All fun and games til you realize you lose more servicemen & women to mishaps than you do to enemy combatants. Which is a factual reality the military has to deal with. Safety isn't a joke, and no, your safety officer isn't going to be getting on your ass with the Hun at the gates, but after a certain point, you have to temper get-there-itis unless you want to hemorrhage manpower to mishap related casualties.

Re: Artemis II's toilet is a moon mission milestone

#180

Earlier quoted context omitted.

Honestly this isn't something people select for at all--by the time you've made it through that many rounds of selection you aren't going to let GI issues keep you from the finish. I've heard of some creative solutions to the problem involving safing the ejection seat and getting out of your gear, but I don't really believe any of them. If you think it's a significant risk, you basically have two options: talk to the…

I suppose you could avoid eating hours before a mission, and not eat gassy foods.

Imodium also does wonders for slowing things down and avoiding bowel movements, provided you use it carefully and infrequently such that you don't totally mess up your normal gut functioning.
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