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08:25
<
kmath >
YouTube - SpaceX's Starship SN3 prototype fails cryogenic proof test
08:31
<
Judge_Dedd >
Eh? How?
08:31
<
Mat2ch >
Oh no, not again :(
08:32
<
Althego >
it didnt even explode
08:32
<
Mat2ch >
looks like the bulkhead inside gave up
08:32
<
Althego >
if it was pressurized how did it shrink so much?
08:32
<
Mat2ch >
only the top tank was pressurized
08:32
<
Althego >
ah yes if the internal structure failed
08:32
<
Mat2ch >
not the bottom tank as you can clearly see
08:32
<
Althego >
then it would behave likea balloon tank
08:33
<
Althego >
now we are waiting for scott to explain?
08:33
<
Althego >
maybe tomorrow
08:33
<
Judge_Dedd >
You can see the buckling already from frame 1
08:33
<
Mat2ch >
so the bulk head failed which created a huge low pressure zone which crumpled the upper tank
08:34
<
Mat2ch >
the buckling from the beginning is because of the weight
08:34
<
Mat2ch >
Why would they only pressure the top tank?
08:34
<
Mat2ch >
That doesn't make any sense
08:35
<
Mat2ch >
the top tank without the support of the pressure of the bottom tank should be to heavy to support
08:35
<
Mat2ch >
this thing only works if both tanks are equally pressured!
08:36
<
Althego >
whatever the cause t hey are now stuck with sn4
08:36
<
Althego >
lot of work wasted
08:37
<
Judge_Dedd >
Not wasted :)
08:37
<
Judge_Dedd >
They got a great Youtube video out of it
08:37
<
Judge_Dedd >
(plus data for future iterations and blahblah)
08:38
<
Althego >
true, but they would have gotten way more data if it flew
08:39
<
Mat2ch >
maybe it really was another test to see if the inner bulkhead could hold up to the pressure
08:39
<
Mat2ch >
and the whole structure
08:39
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08:41
<
Judge_Dedd >
Musk said "Some valves leaked at cryo temp. Fixing & will retest soon" I guess that was before the incident?
08:41
<
Althego >
and elon is probably asleep so no tweets :)
08:42
<
kmath >
<✔JimBridenstine> The worm is back! When the @SpaceX Falcon 9 lifts off carrying @NASA_Astronauts aboard #CrewDragon, it will sport t…
https://t.co/2YFLq4O0kO
08:42
<
Althego >
mostly unrelated
08:43
<
Althego >
or maybe 6
08:46
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09:18
<
kmath >
YouTube - SpaceX Close Up Starship SN3's Fatality At Boca Chica Time Lapse
09:19
<
Mat2ch >
Althego: six legs
09:20
<
Mat2ch >
in this video you see a much much longer testing going on
09:20
<
Mat2ch >
they filled, hold, emptied a bit, filled again
10:07
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10:08
<
kmath >
<✔elonmusk> @austinbarnard45 @LabPadre We will see what data review says in the morning, but this may have been a test configuration mistake
10:09
<
Mat2ch >
also Elon seems to watch the youtube live streams to see what's going on :D
10:10
<
Althego >
or hw was sitting right in the next building
10:11
<
Althego >
but he said what you daid, that it wasnt filled completely
10:13
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10:16
<
kmath >
YouTube - 2020 World's most powerful CW handheld laser
10:18
<
Althego >
the working on the aluminium piece is hilarious (most of it is obviously there for the joke)
10:19
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10:29
<
Mat2ch >
Althego: well, 200 W of heat? And a hand gun case? Sounds like a hairdryer to me. A cool hair dryer ;)
10:35
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11:14
<
Judge_Dedd >
Mat2ch, 200 W packed into a pinpoint is pretty extreme
11:15
<
Althego >
200 W is the heat, 100 W goes into the laser
11:15
<
Judge_Dedd >
I've been following that guy for years. He's pretty crazy :)
11:16
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11:16
<
Judge_Dedd >
The one he made from a tattoo remover was very neat
11:16
<
Althego >
yes way higher poer
11:17
<
Althego >
but that ones is not a beam laser
11:20
<
Judge_Dedd >
True. But it was powerful enough to wreck his camera just from the dot
11:23
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<
hatrix >
is it better to encounter a planet close to it or really far?
11:31
<
hatrix >
for Δv efficiency to circularize I mean
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11:34
<
FLHerne >
hatrix: For a given final orbit, lower is better because Oberth Effect
11:34
<
FLHerne >
But circularizing to a low orbit will take more Δv than a high one
11:37
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12:14
<
hatrix >
it's nice to have a design that just works
12:15
<
kmath >
YouTube - SpaceX SN3 Starship Destroyed - Liquid Oxygen Tank Crumpled
12:15
<
Althego >
with some explanation
12:22
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12:25
<
hatrix >
landed 10km for the base :(
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12:25
<
hatrix >
25m/s on Duna seems like a bad idea though
12:26
<
Althego >
for vertical speed it is a lot. for landing gears horizontally it is fine
12:26
<
hatrix >
ground speed
12:26
<
Althego >
yes i have this rule to never go faster than 25 m/s with a rover
12:27
<
Althego >
because if you do it flips in the next few seconds because of a tiny bump
12:27
<
hatrix >
25 is already quite a lot
12:28
<
hatrix >
ahah, going at 115 kmph on Duna
12:28
<
hatrix >
this is stupid
12:28
<
Althego >
i still couldnt come up with an airplane design that works on duna
12:28
<
hatrix >
I'm currently reading 2001 A Space Odyssey, and they've got a rover going at such speeds on the Moon
12:29
<
hatrix >
even has some thrusters to jump above small craters
12:29
<
Althego >
in reality the real lunar rovers pulled off only a few m/s
12:29
<
Althego >
and even that one was one guy only who dared to do it :)
12:29
<
hatrix >
yep, crazy scary
12:30
<
Althego >
and the mars rovers are something like 5 cm/s
12:30
<
Althego >
or rather 1.5 rover because the other one is not launched yet
12:30
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12:33
<
hatrix >
I have the X³ but never playe
12:33
<
hatrix >
am I missing something?
12:34
<
Althego >
i pasted the link because there are a lot of space games on this list
12:36
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12:37
<
kmath >
YouTube - Clint Mansell - Moon OST #1 - Welcome to Lunar Industries
12:39
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12:40
<
hatrix >
made 6km, 4 left!
12:40
<
hatrix >
Duna's surface is actually really nice or rovers
12:41
<
Althego >
if any of those things has an isru unit i would rather just make a parabolic hop. lot faster
12:41
<
hatrix >
the ISRU is on another rover
12:41
<
hatrix >
which was the first to land 4 or 5 missions ago for this base
12:43
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12:44
<
hatrix >
the 20° degree slopes aren't so nice actually
12:44
<
Althego >
real world rovers did around 30 deg on duna :)
12:45
<
Althego >
slightly above 30 in case of all 3
12:45
<
Althego >
or rather mars
12:45
<
hatrix >
definitely ok, but at 30ms…
12:45
<
Althego >
more like 3 cm/sec :)
12:54
<
Althego >
the isru unit is that facing wast to east?
12:54
<
hatrix >
it's on the rover on the far lest
12:54
<
Althego >
i see that
12:55
<
Althego >
but the question was if the solar panels can follow the sun
12:55
<
Althego >
they can do that if it is facing west to east
12:55
<
Althego >
otherwise they lose efficiency
12:55
<
hatrix >
I'll land a large solar array with lots of batteries either way at one point
12:56
<
hatrix >
but just because it looks cool
12:56
<
hatrix >
the rover has enough electricity
12:59
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15:19
<
Althego >
great, you can put two motors and set of blades inside the duct, they seem to be both affected by the lift increase
15:19
<
Althego >
otherwise my torque would have become unbalanced
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18:18
<
hatrix >
though it sounds quite easy, onlt +5 kerbals and 1 MPL
18:21
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18:21
<
Althego >
finally. made it into eve orbit with only 5k m/s delta v
18:22
<
Althego >
these ducted fans are really powerful there
18:22
<
hatrix >
wow, impressive
18:22
<
hatrix >
what does it look like?
18:26
<
Althego >
it is actually a rocket with some silly wings
18:26
<
hatrix >
what's that thing on the left?
18:26
<
Althego >
with the orange stripe? that is the duct
18:26
<
Althego >
inside there are two motors and two set of blades
18:27
<
Althego >
it takes 3 kerbals and it is only 37.6 r
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18:28
<
Althego >
ok the two set of engines and blades are a bit cheaty, but in reality there are counter rotating blades, what i tried to simulate
18:28
<
hatrix >
how is it cheaty?
18:29
<
hatrix >
I don't have the DLC, I can't judge you :)
18:29
<
Althego >
two parts shifted inside each other
18:32
<
Althego >
ok i dont know how to get it to eve
18:32
<
hatrix >
feels ok to me
18:32
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18:35
<
Althego >
why do you need that empty space there?
18:35
<
hatrix >
where would I put the solar panels?
18:36
<
Althego >
on the lab, etc
18:36
<
lordcirth >
Just stick them on the sides?
18:36
<
lordcirth >
I would put them on the batteries
18:36
<
hatrix >
I wanted to have long "arms" with only solar panels
18:36
<
Althego >
you can put one there
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18:45
<
lordcirth >
NFE would reduce your part count a lot
18:45
<
lordcirth >
If you really need all that
18:45
<
hatrix >
ah, near future elec
18:45
<
lordcirth >
Near Future Electric
18:45
<
lordcirth >
It has bigger/ longer batteries
18:45
<
hatrix >
I don't really like mods
19:04
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19:33
<
hatrix >
what camera is that?
19:33
<
hatrix >
isn't it too heavy?
19:33
<
hatrix >
oh it's a handle for the plates, you can mount anything now :)
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20:12
<
hatrix >
why can you extend antennas when you don't have probe control but you can extend solar panels?
20:12
<
hatrix >
you ca't solar*
20:14
<
lordcirth >
Well, with EC you have a chance to notice that you need to open them before it's too late
20:14
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20:14
<
hatrix >
you're really selling me this mod :D
20:15
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20:15
<
lordcirth >
Hm? I meant electric charge, not NFE
20:15
<
hatrix >
yes, right
20:16
<
hatrix >
I only saw capitals and was like "oh, mod."
20:16
<
lordcirth >
Like, batteries take time to run down, unlike losing signals
20:17
<
packbart >
extending antennas without control doesn't work, either, if the "connection required" difficulty option is on, iirc
20:17
<
hatrix >
it's still easy to forget them though
20:17
<
hatrix >
maybe I'm thinking about limited probe control then
20:20
<
packbart >
NFE solar panels are beautiful and powerful. not sure how they fit into a career, only played with them in a sandbox
20:20
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20:21
<
hatrix >
I didn't want to install mods actually because I wanted to unlock the whole tech tree before and get comfortable with everything
20:21
<
hatrix >
but now that's done, maybe I can look into it
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