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The Expanse Bad Science Roundup (Page 5)
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reader50
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Aug 28, 2022, 11:33 AM
 
Originally Posted by subego View Post
I still want an answer to what they’re using as reaction mass.
I think water is the main reaction mass, mixed with helium from the reactor. Either that, or straight helium after fusion.

In S1, Miller is snooping around the Ceres docks, and there's a near-riot. Martians are trying to stock up their water, and Belters don't want to top them up. Until Dawes says to give the Martians their water.

Water is an oxygen source for life-support, and a hydrogen source for the reactor. But they shouldn't need much of either in a closed ship - the only significant losses are reaction mass. And/or the hydrogen fuel to accelerate the reaction mass.
     
subego  (op)
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Aug 28, 2022, 11:50 AM
 
Originally Posted by OreoCookie View Post
In what way are they weak?
Because “if you don’t do what we say we will stay and die in the tsunami” is an exceedingly bad negotiation strategy.
     
subego  (op)
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Aug 28, 2022, 12:14 PM
 
Originally Posted by reader50 View Post
I think water is the main reaction mass, mixed with helium from the reactor. Either that, or straight helium after fusion.

In S1, Miller is snooping around the Ceres docks, and there's a near-riot. Martians are trying to stock up their water, and Belters don't want to top them up. Until Dawes says to give the Martians their water.

Water is an oxygen source for life-support, and a hydrogen source for the reactor. But they shouldn't need much of either in a closed ship - the only significant losses are reaction mass. And/or the hydrogen fuel to accelerate the reaction mass.
My knee-jerk response is that squares poorly with the Cant’s shuttle. They only had enough O2 for one last pressurization, but enough reaction mass to get somewhere?
     
reader50
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Aug 28, 2022, 12:53 PM
 
Recall that moisture was accumulating on surfaces and people towards the end of the Knight. This indicates loss of dehumidification, and possibly loss of internal temp control. They're unable to salvage water from the air - a serious life support failure.

If the water tank was punctured, then they only have the oxygen and hydrogen that's already separated and in tanks. Enough spare oxygen to repressurize the ship once, and enough hydrogen to get somewhere before they're breathing their socks.

Side note - no spare oxygen is another reason why they couldn't just charge Alex's suit back up. Even if a recharge station still works, that oxygen is for refilling the ship.
     
subego  (op)
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Aug 28, 2022, 01:06 PM
 
If the water tank was punctured, then all their reaction mass would be gone though, right?
     
reader50
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Aug 28, 2022, 02:37 PM
 
If water is the reaction mass, that would follow. If helium is the reaction mass, then you only need the hydrogen tank.

The Epstein Drive is super efficient, but not impossibly so. I've read that bleeding plasma from a reactor at 100 million degrees or so would not be efficient enough. You need to harvest the energy, then accelerate reaction mass to near-lightspeed. That would give you the required efficiency. In which case helium might be the reaction mass, with water supplying the hydrogen fuel.

Water might be an optional add-on, to lower exhaust velocity. Such as in atmosphere, or maneuvering near a station. Hitting atmosphere with a near-lightspeed particle stream would generate X-rays at a minimum. Plus lots of secondary particles.
( Last edited by reader50; Aug 28, 2022 at 02:55 PM. )
     
subego  (op)
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Aug 28, 2022, 09:12 PM
 
Originally Posted by reader50 View Post
If the water tank was punctured…
I posit they’d either have multiple tanks, or if it’s a single tank, it would be one of the most armored components on the ship.

This is fuel, oxygen, and possibly reaction mass. If it shits the bed, everybody dies.
     
subego  (op)
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Aug 28, 2022, 10:12 PM
 
Originally Posted by reader50 View Post
Hitting atmosphere with a near-lightspeed particle stream would generate X-rays at a minimum. Plus lots of secondary particles.
Not to mention a rather large kaboom.
     
subego  (op)
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Aug 29, 2022, 10:00 AM
 
Originally Posted by reader50 View Post
If water is the reaction mass, that would follow. If helium is the reaction mass, then you only need the hydrogen tank.
I have enough respect for the show at this point to assume they ran some numbers, but I’m still (goddamn fucking) curious how much reaction mass they need. Especially for a ridiculous 20G acceleration.

Impossible to tell how big those fuel pellets are solely from that shot. They came across as ping-pong balls there, but judging from other shots with people looking into a reactor, it’s more like a bowling ball.

I’m wondering if there’s a clue in the color temperature of the exhaust.
     
subego  (op)
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Sep 1, 2022, 01:54 PM
 
Tow cable was drooping.

Also, when towing, get your face as close to the cable as possible.
     
subego  (op)
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Sep 1, 2022, 07:51 PM
 
I forgot ”Just Amos Things”.

Holden: I guess this means I can say I took you in a fight.
Amos: You can say whatever you want.


Also, Avasarala‘s closet of saris was kinda funny.
     
subego  (op)
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Sep 2, 2022, 06:34 AM
 
Question of the type that’s a pain in the ass to find an answer to without spoilers.

Which actor plays the Martian cop/crime lord? The one employing Draper.
     
reader50
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Sep 2, 2022, 01:10 PM
 
Paul Schulze as Esai Martin.
     
subego  (op)
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Sep 2, 2022, 04:06 PM
 
TY!

Remember him now from 24.
     
subego  (op)
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Sep 3, 2022, 02:08 PM
 
Oh, I forgot. More towing shenanigans.

Drone ferries over the tow cable to Naomi. It zooms towards her and then suddenly stops.

It would have needed to fire rockets into her face for that to happen, or at least a massively inefficient burn with all the nozzles flared out.
     
subego  (op)
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Sep 4, 2022, 12:44 AM
 
Well, that’s it for S4.

Our final bad science of the season is Ashford singing after he gets spaced.


Not bad science, but I’m disappointed I didn’t get to see the Roci have a showdown with the Edward Israel.
     
subego  (op)
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Sep 8, 2022, 01:29 AM
 
Started S5

reader50 spoiler space begins










Only got through three-quarters of E1. Very slow beginning. I waited a year for this?
     
subego  (op)
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Sep 12, 2022, 12:41 PM
 
Watched the end of that episode, and to be fair to it, they backloaded the best parts.
     
subego  (op)
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Sep 12, 2022, 04:55 PM
 
Originally Posted by OreoCookie View Post
Amos is much more interesting character than Animal Mother…
Pulling this out of the archives to complain.

I’m not sure it’s fair to compare the characterization of a supporting character in a movie to an ensemble main in a six season series.

I mean, Animal Mother’s entire character is in his name. He’s a vicious animal, who viciously protects what he cares about. If I had to encapsulate Amos’ character in two words, I could do a lot worse.

I should also add, though the characters are very different, Baldwin played Jayne on Firefly, which made me unconsciously connect them.


As an aside about naming characters…

Charlotte means “little and feminine”.
Sam is fundamentally a masculine name.
Miranda is (among other things) a legal concept.
Carrie carries the show.
     
subego  (op)
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Sep 22, 2022, 11:45 AM
 
It’s kinda lost my dad. For the first time since we started, last night he was like “let’s watch something else”.
     
Thorzdad
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Sep 22, 2022, 01:06 PM
 
Originally Posted by subego View Post
I should also add, though the characters are very different, Baldwin played Jayne on Firefly, which made me unconsciously connect them...
Miranda is (among other things) a legal concept.
Miranda is also the planet where the Reavers were accidentally created by the Alliance in Serenity, which would also be a Firefly hook.

That said, you don’t create a character named Miranda in a drama and not be aware of work by this guy named Shakespeare.
     
subego  (op)
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Sep 22, 2022, 01:52 PM
 
Sex and the City was a comedy tho.

I’m not that familiar with The Tempest. Are there obvious character parallels? With SitC I always drew a straight line between “Miranda” and her being an attorney.
     
Waragainstsleep
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Sep 22, 2022, 02:32 PM
 
Miranda is a moon of Uranus.
I have plenty of more important things to do, if only I could bring myself to do them....
     
reader50
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Yesterday, 02:10 AM
 
Originally Posted by subego View Post
Sam is fundamentally a masculine name.
So a girl named Samantha would go by the nickname ... Saman? Sounds like a fish dinner.

ps - I don't blame people for their birth names. Blame their parents.
     
Thorzdad
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Yesterday, 05:07 AM
 
It’s actually kind of cool how you can give a woman pretty much any traditionally “masculine” name and it actually works.
     
subego  (op)
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Yesterday, 12:49 PM
 
Originally Posted by reader50 View Post
So a girl named Samantha would go by the nickname ... Saman? Sounds like a fish dinner.
Fundamentally, not exclusively.

If there’s no other context, I posit most will assume a Sam is male.
     
subego  (op)
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Yesterday, 12:51 PM
 
Originally Posted by Thorzdad View Post
It’s actually kind of cool how you can give a woman pretty much any traditionally “masculine” name and it actually works.
Like Ralph.

     
subego  (op)
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Yesterday, 04:48 PM
 
Originally Posted by reader50 View Post
Blame their parents.
My uncle’s first name is Thomas.

His last name is also Thomas.
     
ghporter
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Yesterday, 07:15 PM
 
I have encountered several women named "Michael". And my first name, Glenn, is also a relatively common name for women (Glenn Close, for example). An OT classmate's grandmother was named Glenn, and my classmate got her middle name from her.

And dang it! Now I have the SNL "Pat" character stuck in my head. Argh!

Glenn -----OTR/L, MOT, Tx
     
subego  (op)
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Yesterday, 08:16 PM
 
The current grand dame of Chicago gossip columnists is Mike Sneed.
     
OreoCookie
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Yesterday, 09:21 PM
 
Originally Posted by subego View Post
My uncle’s first name is Thomas.

His last name is also Thomas.
Are the parents in jail for child abuse?
(That’s really dumb. People whose last name is also a first name are at a natural disadvantage, but doing this to a child is a crime. How often did that poor person have to explain that he doesn’t have a stutter or a tic, that Thomas is really first and last name?)
I don't suffer from insanity, I enjoy every minute of it.
     
Waragainstsleep
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Yesterday, 09:21 PM
 
Originally Posted by subego View Post
My uncle’s first name is Thomas.

His last name is also Thomas.
What sound does he make if you hit him?
I have plenty of more important things to do, if only I could bring myself to do them....
     
subego  (op)
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Yesterday, 09:45 PM
 
Originally Posted by OreoCookie View Post
Are the parents in jail for child abuse?
(That’s really dumb. People whose last name is also a first name are at a natural disadvantage, but doing this to a child is a crime. How often did that poor person have to explain that he doesn’t have a stutter or a tic, that Thomas is really first and last name?)
The family name is originally something like Tomasunas, so it’s possible his last name at birth wasn’t Thomas. I’m not sure of the timeline, but somewhere along the way my grandparents anglicized across-the-board. For years I thought my mom’s maiden name was Thomas. She was definitely born before it happened.
     
reader50
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Today, 01:43 AM
 
Originally Posted by subego View Post
Tow cable was drooping.

Also, when towing, get your face as close to the cable as possible.
Agree, small errors in the closeups. They should have countered the cable droop with some wire supports erased in post. The faces thing is practical filming - gotta see the cable, and their faces. The simplest way is if the actors constantly study the tow cable for insects.

Originally Posted by subego View Post
Oh, I forgot. More towing shenanigans.

Drone ferries over the tow cable to Naomi. It zooms towards her and then suddenly stops.

It would have needed to fire rockets into her face for that to happen, or at least a massively inefficient burn with all the nozzles flared out.
Disagree. A cable or chain has no compression strength. If you stop the end, the rest keeps coming. It stops when you tension the reel at the other end. So it's correct if the ferry drone does not brake.

Bonus points: the Roci is applying tension to the tether off-center to route past the main engine. So it needs to thrust sideways at the bow, to prevent being torqued towards the cable mount. And the attitude jets are indeed firing during the tow sequence, in the correct direction to counter the off-center torque.

Minor nit: why not have the Roci fly sideways, pull on the cable from the cargo bay, and use the side thrusters exclusively? No roller tower, and the tether pulls from the center of mass, so no inefficient side thrusting needed. Presumably to reduce atmospheric drag on the Roci, and because it would look funny on screen. Perhaps the rear thrusters are slightly more efficient. But the minor savings from reduced drag are probably lost many times over to the bow thrusters keeping the Roci straight against the off-center torque.
     
 
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