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/sci/ - Science & Math

File: 2.84 MB, 1280x720, Space Shuttle.webm [View same] [iqdb] [saucenao] [google]

Anonymous Sun Nov 29 08:59:48 2015 No.7688136 [Reply] [Original]

/sci/ webm thread

Anonymous Sun Nov 29 11:11:57 2015 No.7688271

>>7688136
what's happening between the engine ignition and the moment it's fully lit (transparent exhaust gas + shock diamonds or whatever they are called) ?
the exhaust is red for a few second for some reasons , why ?

also what's the use of the circles that break on the top right part of the engine ?

>>	Anonymous Sun Nov 29 11:52:30 2015 No.7688326 >>7688271 Those are very good questions. Unfortunately, I don't have an answer at this moment.

RORO Sun Nov 29 12:03:11 2015 No.7688346

i know it has to do with the different temperatures. it doesn't instantaneous get to the temperature needed for lift off. the shapes in the burning fuel is like the ones in a welder, and they areas of different temperatures. as for the circles i have no clue.

>>	RORO Sun Nov 29 12:04:12 2015 No.7688351 hope that helps.

Anonymous Sun Nov 29 12:08:03 2015 No.7688354

>>7688271

I'm supposing the color is a result of the fuel mixture not being exactly right at first. If you slow the webm down, you can see that each engine fires in turn. The computer doesn't allow them to come to full thrust until it's satisfied that everything is running normally. The sparky thingy is to burn off any hydrogen that might have leaked and collected under the engine bells.

The circles are thin covers for thrusters that are used when the shuttle is on orbit. I suppose they cover them before launch to prevent critters and debris from getting into them.

>>	Anonymous Sun Nov 29 13:28:36 2015 No.7688495 >>7688136 Why do they spray those sparks at the exhaust?

>>	Anonymous Sun Nov 29 13:38:48 2015 No.7688509 >>7688495 you ever use a lighter before? same idea

>>	Anonymous Sun Nov 29 14:58:59 2015 No.7688665 >>7688509 that's not it at all see: >>7688354

>>	Anonymous Sun Nov 29 15:55:50 2015 No.7688827 >>7688665 But i'm fairly certain that LOX/LH does not make a hypergolic fluid, thus the spark-igniters that are used to burn of the excess hydrogen also acts as the main ignition source for the SSME.

>>	Anonymous Sun Nov 29 20:00:15 2015 No.7689291 >>7688827 Nah. They use what essentially is a gigantic spark plug inside the engine to light it up.

Anonymous Sun Nov 29 22:37:27 2015 No.7689470

>>7688271
>what's happening between the engine ignition and the moment it's fully lit (transparent exhaust gas + shock diamonds or whatever they are called) ?
Engines are gradually coming up to pressure. First the sparks start flying, then they start pumping propellant, flame propogates up the (still subsonic) propellant stream, turbopumps speed up, chamber pressures increase, combustion efficiency improves and eventually flow is choked at the nozzle and goes supersonic.
>also what's the use of the circles that break on the top right part of the engine ?
They protect the RCS jets from being fouled by the elements. Florida is a very humid place, you know.

>>	Anonymous Sun Nov 29 23:00:49 2015 No.7689494 File: 319 KB, 256x256, Fourier_series_square_wave_circles_animation.gif [View same] [iqdb] [saucenao] [google]

>>	Anonymous Sun Nov 29 23:03:08 2015 No.7689495 File: 2.86 MB, 1280x720, 1428167053866.webm [View same] [iqdb] [saucenao] [google]

>>	Anonymous Sun Nov 29 23:07:51 2015 No.7689503 File: 250 KB, 256x256, 1448856049795.gif [View same] [iqdb] [saucenao] [google] >>7689494 I could not help but notice your gif was not optimized anon. I have optimized your gif. Your gif is now optimized.

>>	Anonymous Sun Nov 29 23:11:15 2015 No.7689509 >>7688827 >But i'm fairly certain that LOX/LH does not make a hypergolic fluid engines that use non-hypergolic mixes also tend to use a hypergolic slug that's the first thing out of the feed lines.

>>	Anonymous Mon Nov 30 00:48:26 2015 No.7689585 >>7689503 who runs this bot, seriously

>>	Anonymous Mon Nov 30 02:39:24 2015 No.7689709 >>7689291 really? cool, anyone have a picture/diagram showing the placement?

>>	Anonymous Mon Nov 30 03:26:43 2015 No.7689755 File: 492 KB, 500x533, 1427319970784.gif [View same] [iqdb] [saucenao] [google]

>>	Anonymous Mon Nov 30 03:35:22 2015 No.7689758 File: 488 KB, 500x533, 1448872003000.gif [View same] [iqdb] [saucenao] [google] >>7689755 I could not help but notice your gif was not optimized anon. I have optimized your gif. Your gif is now optimized.

>>	Anonymous Mon Nov 30 03:40:59 2015 No.7689763 >>7689755 Could someone pls optimise this gif?

>>	Anonymous Mon Nov 30 05:09:09 2015 No.7689834 nevermind, found it here: http://large.stanford.edu/courses/2011/ph240/nguyen1/docs/SSME_PRESENTATION.pdf

>>	Anonymous Mon Nov 30 05:13:56 2015 No.7689838 File: 1.46 MB, 256x256, refraction.webm [View same] [iqdb] [saucenao] [google] >>7688136

>>	Anonymous Mon Nov 30 05:19:06 2015 No.7689840 File: 2.15 MB, 550x432, [aes].gif [View same] [iqdb] [saucenao] [google] >>7688136

>>	Anonymous Mon Nov 30 05:31:40 2015 No.7689852 File: 1.72 MB, 540x288, 1431568364694.gif [View same] [iqdb] [saucenao] [google]

>>	Anonymous Mon Nov 30 09:41:25 2015 No.7690029 >>7689838 Except that's wrong

>>	Anonymous Mon Nov 30 09:52:30 2015 No.7690041 >>7689585 >bot it's just a wonderfully dedicated anon

>>	Anonymous Mon Nov 30 10:22:56 2015 No.7690077 >>7689840 webbum or something else please. This shit goes too fast.

>>	Anonymous Mon Nov 30 11:01:07 2015 No.7690111 File: 97 KB, 462x340, EntirePlutoFlyby.webm [View same] [iqdb] [saucenao] [google] Neat.

>>	Anonymous Mon Nov 30 11:07:08 2015 No.7690116 >>7690111 fake and gay

>>	Anonymous Mon Nov 30 11:39:07 2015 No.7690155 >>7690077 >not able to read at that speed it goes too slow most panels, you must be retarded.

>>	Anonymous Mon Nov 30 16:24:57 2015 No.7690675 >>7690029 No it's not

>>	Anonymous Mon Nov 30 16:33:07 2015 No.7690695 File: 2.72 MB, 1100x863, AES.webm [View same] [iqdb] [saucenao] [google] >>7690077

>>	Anonymous Tue Dec 1 00:12:25 2015 No.7691536 >>7690029 Dude, it's /sci/. It doesn't matter if its actually wrong or right, [math]everything[/math] is fucking wrong

>>	Anonymous Tue Dec 1 01:55:48 2015 No.7691712 >>7690029 https://en.wikipedia.org/wiki/Negative_refraction

>>	Anonymous Tue Dec 1 16:13:32 2015 No.7692884 >>7689494 I'm not that amazing at math, but when i plug these formulas, specifically the 4th one, i dont get anything like the displayed graphs, the only one that works is the 1st one.

>>	Anonymous Tue Dec 1 16:36:32 2015 No.7692936 File: 2.15 MB, 1280x720, 1405008260856.webm [View same] [iqdb] [saucenao] [google]

>>	Anonymous Tue Dec 1 16:40:57 2015 No.7692954 File: 2.83 MB, 1920x1080, 1405008911589.webm [View same] [iqdb] [saucenao] [google]

>>	Anonymous Tue Dec 1 16:42:22 2015 No.7692956 File: 381 KB, 480x360, 1421607853152.webm [View same] [iqdb] [saucenao] [google]

>>	Anonymous Tue Dec 1 16:43:11 2015 No.7692957 >>7692954 Gosh the night sky is wonderful. I really hate light pollution.

>>	Anonymous Tue Dec 1 16:43:52 2015 No.7692958 File: 2.88 MB, 169x95, 1422504339648.webm [View same] [iqdb] [saucenao] [google]

>>	Anonymous Tue Dec 1 17:35:35 2015 No.7693074 File: 136 KB, 512x512, cme.webm [View same] [iqdb] [saucenao] [google] This happened yesterday, but once again by sheer luck, it was not pointed at Earth.

>>	Anonymous Tue Dec 1 17:37:14 2015 No.7693077 >>7693074 That is Saturn transiting in the upper middle toward the right.

>>	Anonymous Tue Dec 1 17:37:22 2015 No.7693078 >>7692958 these always make me very uncomfortable

>>	Anonymous Tue Dec 1 17:54:30 2015 No.7693105 >>7692956 Daily reminder that there are people out there who belive the ISS is a plane or blimp used to fool everyone...for reasons.

>>	Anonymous Tue Dec 1 17:59:03 2015 No.7693115 File: 758 KB, 646x379, soho.webm [View same] [iqdb] [saucenao] [google] A nice little montage for SOHO's 20th anniversary

>>	Anonymous Tue Dec 1 18:12:17 2015 No.7693135 >>7692884 As you go down the list, you have to sum up the terms to get the resulting waveform. >Second wave is sum of first + second terms >Third wave is sum of first+second+third terms >etc

>>	Anonymous Tue Dec 1 18:14:33 2015 No.7693141 >>7689852 Holy fuck that is awsome

>>	Anonymous Tue Dec 1 19:52:25 2015 No.7693327 >>7693135 thanks.

>>	Anonymous Wed Dec 2 10:17:22 2015 No.7694271 >>7689495 what the fuck is that and where can i get it ?

>>	Anonymous Wed Dec 2 10:45:30 2015 No.7694318 >>7692957 >tfw havent seen the stars properly in months why even exist

>>	Anonymous Wed Dec 2 13:48:33 2015 No.7694610 >>7694271 Ferrofluid. As the name implies, it's a magnetic fluid.

>>	Anonymous Wed Dec 2 14:05:02 2015 No.7694650 >>7690695 tf;dr

>>	Anonymous Wed Dec 2 20:01:33 2015 No.7695464 File: 933 KB, 1280x176, Sonoluminescence_of_Synthetic_Ordnance_Gel.ogv.720p.webm [View same] [iqdb] [saucenao] [google] https://en.wikipedia.org/wiki/Sonoluminescence

>>	Anonymous Thu Dec 3 06:11:51 2015 No.7696290 >>7694610 neat, is it expensive ?

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