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The Delta IV rocket is one of the two rockets that came from the Evolved Expendable Launch Vehicle program (aka "If Boeing and Lockheed Martin won't stop suing each other, we'll make them work together!") For those not familiar with rocket science, the simple way to increase payload mass is to use more rocket to lift it. The first stage of the Delta IV is called the Common Booster Core. The Delta IV has variants that use anywhere from 1 to 5 strap-on solid rocket boosters to boost larger mass payloads to orbit. Here's one with two solid rockets In its largest form, the Delta IV heavy leaves those boosters behind and simply uses 3 Common Booster Cores. The outside ones run at full throttle and the center one is throttled down to conserve fuel for when the weight of the extra two boosters has been thrown off. In its Heavy configuration, the Delta IV prepares for launch by, at T-7, purging and cooling the engines with a burst of hydrogen fuel (going from cryogenic to gaseous takes a huge amount of energy and cools everything around it.) This leaves the problem of a massive cloud of hydrogen gas around the rocket; the gas is ... Promptly Burned Off The orange paint on the fuel tanks is formulated to attract free hydrogen in the atmosphere and to hold it there burning in a controlled manner rather than risk forming bubbles or pockets of hydrogen in the atmosphere that could explode. The rocket is supposed to be on fire. It's a safety feature. With what may be the final flight of the Delta IV Heavy nearing, I urge all of you to watch the test flight and reentry of the Orion Module on December 4 (check the Spaceflight megathread in Sciences, Academics, and Languages for further info.) GWBBQ has a new favorite as of 03:57 on Nov 19, 2014 |
# ¿ Nov 18, 2014 04:25 |
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# ¿ May 14, 2024 23:13 |
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Pyro Fox posted:I think this qualifies.
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# ¿ Jan 11, 2015 05:26 |
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There's many who tried to prove that they're faster, but they didn't last and they died as they tried.
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# ¿ Mar 18, 2015 01:25 |
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blunt for century posted:I imagine gently caress Tha Police playing the entire time he's riding around.
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# ¿ Mar 18, 2015 01:33 |
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Rally racing isn't like track racing where you can sit in the stands and watch. Most of the time the fans stand dangerously close to the track and watch. Sometimes, something goes horribly wrong and they're more than willing to jump in and help ... get the car back on the track https://www.youtube.com/watch?v=U4nVOQuCg_Q or when all else fails, jump in a lake and pull the drivers out so they don't drown. https://www.youtube.com/watch?v=F39lc_FQY-I
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# ¿ Apr 11, 2015 23:23 |
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Sionistic posted:Yeah I think its how many meters till the next turn
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# ¿ Apr 12, 2015 01:20 |
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Say Nothing posted:I'd like to believe this was an intentional shot.
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# ¿ May 1, 2015 04:32 |
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fits posted:Now watch how a cat tries to orient itself to fall in zero gravity
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# ¿ May 14, 2015 03:41 |
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Phyzzle posted:I was curious how an Australian came to own a horse farm in Pennsylvania, so I Googled Jared Hyams and
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# ¿ Jan 24, 2016 22:53 |
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chitoryu12 posted:When that privately funded one-way trip to Mars got announced, the first cut of candidates was 1058 out of over 200,000 applications. Even accounting for joke applications, there's still tens of thousands of people who are totally willing to abandon their lives on Earth and spend the rest of their days traveling through space and living in a tiny settlement on Mars.
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# ¿ May 2, 2016 16:43 |
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baw posted:professional skateboarders are usually pretty great at falling, because skateboarders fall a lot
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# ¿ Jul 9, 2016 03:00 |
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sneakyfrog posted:I will never get tired of SR-71 stories I don't know what kind of things he knew and saw that he couldn't tell me from his time in the Air Force, but I do know that they posted two armed guards in the room when he had his appendix removed to get everyone out of the hospital room in case he started talking when recovering from general aneasthesia (his brother said they had orders to shoot everyone in the room, but I think that's wildly exaggerated.) edit: he worked in intelligence, said that he worked with TS-SCI information, and did tell me that he knew things he would never be allowed to say to another person as long as he lived. As a teenager I took great joy in annoying him by saying he worked on the aliens at Area 51. Say Nothing posted:This guy... GWBBQ has a new favorite as of 01:58 on Jul 1, 2017 |
# ¿ Jul 1, 2017 01:56 |
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ESDK posted:It can work out suprisingly well for the bike:
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# ¿ Dec 11, 2017 00:21 |
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Ornamental Dingbat posted:The crappy robots lady has a brain tumor- how does she cope? Beachcomber posted:Would this dog have been broken if that aircushion wasn't there?
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# ¿ May 4, 2018 23:43 |
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Snowglobe of Doom posted:Or you see them trying to do regular everyday things like catching a plane Snowy posted:Oh poo poo I need that Eyehatedog patch
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# ¿ May 27, 2018 08:18 |
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Otteration posted:I, too hate other people that have fun in ways I didn't vote for. drat skate kits! Get Offa my grass! A lot of those rocks are razor sharp. The preserve is named Tsingy de Bemaraha with Tsingy being derived from an indigenous word meaning "the place where one cannot walk barefoot."
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# ¿ Jul 4, 2018 21:18 |
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Croatoan posted:I always thought Sinatra was a shithead because how he treated his wives and was a mob-adjacent rear end in a top hat. Turns out he was a dynamic person with both good and bad.
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# ¿ Jul 11, 2018 16:21 |
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Croatoan posted:He also went from supporting a socialist, Henry Wallace when he was young to being a staunch Regan supporter as he got older. Bertrand Hustle posted:I've heard stories of Sinatra refusing to perform at clubs that didn't allow black people, too. I think this is the best way to remember him. Not a classic tragic hero, but a man who wasn't fully in control of his mind or body. Balance any scorn with sympathy, and come to whatever conclusion you will.
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# ¿ Jul 18, 2018 01:16 |
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Say Nothing posted:Welcome to the future.
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# ¿ Jul 22, 2018 20:10 |
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muscles like this! posted:While this is still super impressive it definitely looks like the middle and top ones were pre-broken and barely hanging on. C.M. Kruger posted:The Soviets also started using the space pen shortly after NASA did, because NASA gave them 100 space pens as a gift to promote international goodwill and so on.
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# ¿ Aug 6, 2018 01:48 |
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BrigadierSensible posted:2 details that I noticed. 3) Current New Jersey license plate 4) Either they have identically low tires for some reason or they're intentionally running the tires low for a bigger contact patch to try to keep as much rubber on the road as possible to handle whatever is under the hood. That's a converted church van if I've ever seen one, so either the owner missed one of the things that makes a sleeper a sleeper, or Jesus built their hot rod.
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# ¿ Mar 2, 2022 07:59 |
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# ¿ May 14, 2024 23:13 |
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In the northern hemisphere, you can sight along the two stars of the big dipper opposite the handle and find Polaris, so you can figure out which way is north if you're lost in the wilderness or at sea.
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# ¿ May 7, 2022 17:06 |