
AdamSmith
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Infographic comparing Saturn, Shuttle, forthcoming Orion system. Note the decrease in lift capacity from Saturn to Orion. Aughh.
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And von Braun had to move heaven and earth to win acceptance for his notion that: You know what. Instead of just lighting the engines and hoping -- and having the thing blow up on the pad, or rise off the pad and then settle back down and blow up, or just topple over and blow up, all seemingly the Air Force's preferred ways of proceeding when it ran our missile program -- why not instrument the rocket every way from Sunday and satisfy ourselves that the engines are in fact working before we send it up. Trying to remember the title of a von Braun bio I read long ago that had great stories about him gingerly trying to bring the brass around, while vigorously fitting into Huntsville local life etc. so as not to be seen as the ex-Nazi bully.
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Eek. Reference to O-rings etc. reminds how many of von Braun's design rules the Shuttle violated utterly. He would never had countenanced solid-fuel rockets of course. And he mandated: No part of the spaceship shall be higher than the astronauts. Except obviously for their escape tower.
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The minutes leading up to the preceding... PAO: This is Apollo Saturn Launch Control. We've passed the 6 minute mark in our countdown for Apollo 11. Now 5 minutes, 52 seconds and counting. We're on time at the present time for our planned lift-off of 32 minutes past the hour. Spacecraft Test Conductor, Skip Chauvin, now has completed the status check of his personnel in the control room. All report they are Go for the mission, and this has been reported to the Test Supervisor, Bill Schick. The test supervisor now going through some status checks. Launch Operations Manager Paul Donnelly reports Go for launch. Launch Director Rocco Petrone now gives a Go. We're 5 minutes, 20 seconds and counting. Coming up shortly, that swing arm up at the spacecraft level will come back to its fully retracted position. This should occur at the 5-minute mark in the count. In the meantime the Lunar Module telemetry has been powered down. We took a good look at Eagle, and it looks good. The Spacecraft Test Conductor for the Lunar Module reported that Eagle was Go. The swing arm now coming back to its fully retracted position as our countdown continues. T minus 4 minutes, 50 seconds and counting. Skip Chauvin informing the astronauts that the swing arm now coming back. The astronauts will have a few more reports coming up in the countdown. The last business report will be from Neil Armstrong at the 45-second mark in the count when he gives the status on the final alignment of the Stabilization and Control System. We're now passing the 4 minute, 30 second mark in the countdown - still Go at this time. [MP3 audio file. 2,539 kB.] PAO: Four minutes, 15 seconds - the Test Supervisor now has informed Launch Vehicle Test Conductor Norm Carlson, you are Go for launch. From this time down, Carlson handles the countdown as the launch vehicle begins to build up. We're now hitting the 4-minute mark. Four minutes and counting. We are Go for Apollo 11. We'll go on an automatic sequence as standing at 3 minutes and 7 seconds. PAO: Three minutes, 45 seconds and counting. In the final abort checks between several key members of the crew here in the control center and the astronauts, Launch Operations Manager Paul Donnelly wished the crew, on the launch teams' behalf, "Good luck and Godspeed." PAO: Three minutes, 25 seconds and counting; we're still Go at this time. We'll be coming up on the automatic sequence about 10 or 15 seconds from this time. All still Go at this time. Neil Armstrong reported back when he received the good wishes: "Thank you very much. We know it will be a good flight." Firing command coming in now. We are on the automatic sequence. We're approaching the 3 minute mark in the count. T minus 3 minutes and counting. T minus 3 - we are Go with all elements of the mission at this time. We're on an automatic sequence as the master computer supervises hundreds of events occurring over these last few minutes. PAO: T minus 2 minutes, 45 seconds and counting. The members of the launch team here in the control center monitoring a number of what we call red-line values. These are tolerances we don't want to go above and below in temperatures and pressures. They're standing by to call out any deviations from our plans. Two minutes, 30 seconds and counting; we're still Go on Apollo 11 at this time. The vehicle starting to pressurize as far as the propellant tanks are concerned, and all is still Go as we monitor our status board. Two minutes, 10 seconds and counting. The target for the Apollo 11 astronauts, the Moon, at lift-off, will be at a distance of 218,096 miles away. We just passed the 2-minute mark in the countdown. T minus 1 minute, 54 seconds and counting. Our status board indicates that the oxidizer tanks in the second and third stages now have pressurized. We continue to build up pressure in all three stages here at the last minute to prepare it for lift-off. [MP3 audio file. 1,861 kB.] PAO: T minus 1 minute, 35 seconds on the Apollo mission, the flight to land the first men on the Moon. All indications coming in to the control center at this time indicate we are Go. One minute, 25 seconds and counting. Our status board indicates the third stage completely pressurized. Eighty-second mark has now been passed. We'll go on full internal power at the 50-second mark in the countdown. Guidance system goes on internal at 17 seconds leading up to the ignition sequence at 8.9 seconds. We're approaching the 60-second mark on the Apollo 11 mission.
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From NASA's Apollo 11 Flight Journal... PAO: T minus 60 seconds and counting. We have passed T minus 60. 55 seconds and counting. Neil Armstrong just reported back: "It's been a real smooth countdown". We've passed the 50-second mark. Power transfer is complete - we're on internal power with the launch vehicle at this time. 40 seconds away from the Apollo 11 lift-off. All the second stage tanks now pressurized. 35 seconds and counting. We are still Go with Apollo 11. 30 seconds and counting. Astronauts report, "It feels good". T minus 25 seconds. PAO: Twenty seconds and counting. T minus 15 seconds, guidance is internal. Twelve, 11, 10, 9, ignition sequence starts... PAO: ...6, 5, 4... [The F-1 engine has a complex ignition sequence which will be described here. First, a description of the engine.] [ A large combustion chamber and bell have an injector plate at the top, through which RP-1 fuel and LOX are injected at high pressure. Above the injector is the LOX dome which also transmits the force of the thrust from the engine to the rocket's structure. A single-shaft turbopump is mounted beside the combustion chamber. The turbine is at the bottom and is driven by the exhaust gas from burning RP-1 and LOX in a fuel-rich mixture in a gas generator. After powering the turbine, the exhaust gases pass through a heat exchanger, then to a wrap-around exhaust manifold which feeds it into the periphery of the engine bell. The final task for these hot gases is to cool and protect the nozzle extension from the far hotter exhaust of the main engine itself. Above the turbine, on the same shaft, is the fuel pump with two inlets from the fuel tank and two outlets going, via shut-off valves, to the injector plate. A line from one of these 'feeds' supplies the gas generator with fuel. Fuel is also used within the engine as a lubricant and as a hydraulic working fluid, though before launch, RJ-1 ramjet fuel is supplied from the ground for this purpose. At the top of the turbopump shaft is the LOX pump with a single, large inlet in-line with the turboshaft axis. This pump also has two outlet lines, with valves, to feed the injector plate. One line also supplies LOX to the gas generator. The interior lining of the combustion chamber and engine bell consists of a myriad of pipework through which a large portion of the fuel supply is fed. This cools the chamber and bell structure while also pre-warming the fuel. Lastly, an igniter, containing a cartridge of hypergolic fluid with burst diaphragms at either end, is in the high pressure fuel circuit and has its own inject point in the combustion chamber. This fluid is triethylboron with 10-15% triethylaluminium.] [At T minus 8.9 seconds, a signal from the automatic sequencer fires four pyrotechnic devices. Two of them cause the fuel-rich turbine exhaust gas to ignite when it enters the engine bell. Another begins combustion within the gas generator while the fourth ignites the exhaust from the turbine. Links are burned away by these igniters to generate an electrical signal to move the start solenoid. The start solenoid directs hydraulic pressure from the ground supply to open the main LOX valves. LOX begins to flow through the LOX pump, starting it to rotate, then into the combustion chamber. The opening of both LOX valves also causes a valve to allow fuel and LOX into the gas generator, where they ignite and accelerate the turbine. Fuel and LOX pressures rise as the turbine gains speed. The fuel-rich exhaust from the gas generator ignites in the engine bell to prevent backfiring and burping of the engine. The increasing pressure in the fuel lines opens a valve, the igniter fuel valve, letting fuel pressure reach the hypergol cartridge which promptly ruptures. Hypergolic fluid, followed by fuel, enters the chamber through its port where it spontaneously ignites on contact with the LOX already in the chamber.] PAO: ...3... [Rising combustion-induced pressure on the injector plate actuates the ignition monitor valve, directing hydraulic fluid to open the main fuel valves. These are the valves in the fuel lines between the turbopump and the injector plate. The fuel flushes out ethylene glycol which had been preloaded into the cooling pipework around the combustion chamber and nozzle. The heavy load of ethylene glycol mixed with the first injection of fuel slows the build-up of thrust, giving a gentler start. Fluid pressure through calibrated orifices completes the opening of the fuel valves and fuel enters the combustion chamber where it burns in the already flaming gases. The exact time that the main fuel valves open is sequenced across the five engines to spread the rise in applied force that the structure of the rocket must withstand.] [This diagram shows how the thrust rose during the start-up of each engine. It takes two seconds for full performance to be attained on all engines once the first has begun increasing. The engines are started in a staggered 1-2-2 sequence so that the rocket's structure would be spared a single large load increase, with the centre engine being the first to start. The outboard engines exhibit a hiccup in their build-up due to the ingestion of helium from the pogo suppression system installed in each one. The centre engine does not have this installed.] PAO: ...2, 1, zero, all engine running, LIFT-OFF! [As the flow of fuel and LOX rises to maximum, the chamber pressure, and therefore thrust, is monitored to confirm that the required force has been achieved. With the turbopump at full speed, fuel pressure exceeds hydraulic pressure supplied from ground equipment. Check valves switch the engine's hydraulic supply to be fed from the rocket's fuel instead of from the ground.] [Public Affairs Officer Jack King, whose coolness is legendary, finally succumbs to the tension and is clearly heard to say "all engine running" instead of "all engines running".] PAO: We have a lift-off, 32 minutes past the hour. Lift-off on Apollo 11. http://history.nasa.gov/ap11fj/01launch.htm
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Nice slo-mo launch video. Especially interesting at 1:06-1:40 the release of the huge hold-down clamps visible in the freeze-frame below, which both supported the rocket (the base of the rocket structure frame sat on them) and held it down on the pad until all 5 engines had built up full thrust and the master ground computer gave the 'Commit to launch' signal.
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Hm.
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Whom could I be talking to with this one...?
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Browsing in Sen. Sam's utterances sent me to Justice Davis's great Ex parte Milligan decision from 1866. The essence is a ringing defense of core Constitutional protections, only too relevant today. ...The controlling question in the case is this: Upon the facts stated in Milligan's petition, and the exhibits filed, had the military commission mentioned in it jurisdiction, legally, to try and sentence him? Milligan, not a resident of one of the rebellious states, or a prisoner of war, but a citizen of Indiana for twenty years past, and never in the military or naval service, is, while at his home, arrested by the military power of the United States, imprisoned, and, on certain criminal charges preferred against him, tried, convicted, and sentenced to be hanged by a military commission, organized under the direction of the military commander of the military district of Indiana. Had this tribunal the legal power and authority to try and punish this man? No graver question was ever considered by this court, nor one which more nearly concerns the rights of the whole [71 U.S. 2, 119] people; for it is the birthright of every American citizen when charged with crime, to be tried and punished according to law. The power of punishment is, alone through the means which the laws have provided for that purpose, and if they are ineffectual, there is an immunity from punishment, no matter how great an offender the individual may be, or how much his crimes may have shocked the sense of justice of the country, or endangered its safety. By the protection of the law human rights are secured; withdraw that protection, and they are at the mercy of wicked rulers. or the clamor of an excited people. If there was law to justify this military trial, it is not our province to interfere; if there was not, it is our duty to declare the nullity of the whole proceedings. The decision of this question does not depend on argument or judicial precedents, numerous and highly illustrative as they are. These precedents inform us of the extent of the struggle to preserve liberty and to relieve those in civil life from military trials. The founders of our government were familiar with the history of that struggle; and secured in a written constitution every right which the people had wrested from power during a contest of ages. By that Constitution and the laws authorized by it this question must be determined. The provisions of that instrument on the administration of criminal justice are too plain and direct, to leave room for misconstruction or doubt of their true meaning. Those applicable to this case are found in that clause of the original Constitution which says, 'That the trial of all crimes, except in case of impeachment, shall be by jury;' and in the fourth, fifth, and sixth articles of the amendments. The fourth proclaims the right to be secure in person and effects against unreasonable search and seizure; and directs that a judicial warrant shall not issue 'without proof of probable cause supported by oath or affirmation.' The fifth declares 'that no person shall be held to answer for a capital or otherwise infamous crime unless on presentment by a grand jury, except in cases arising in the land or naval forces, or in the militia, when in actual service in time of war or public danger, nor be deprived [71 U.S. 2, 120] of life, liberty, or property, without due process of law.' And the sixth guarantees the right of trial by jury, in such manner and with such regulations that with upright judges, impartial juries, and an able bar, the innocent will be saved and the guilty punished. It is in these words: 'In all criminal prosecutions the accused shall enjoy the right to a speedy and public trial by an impartial jury of the state and district wherein the crime shall have been committed, which district shall have been previously ascertained by law, and to be informed of the nature and cause of the accusation, to be confronted with the witnesses against him, to have compulsory process for obtaining witnesses in his favor, and to have the assistance of counsel for his defence.' These securities for personal liberty thus embodied, were such as wisdom and experience had demonstrated to be necessary for the protection of those accused of crime. And so strong was the sense of the country of their importance, and so jealous were the people that these rights, highly prized, might be denied them by implication, that when the original Constitution was proposed for adoption it encountered severe opposition; and, but for the belief that it would be so amended as to embrace them, it would never have been ratified. Time has proven the discernment of our ancestors; for even these provisions, expressed in such plain English words, that it would seem the ingenuity of man could not evade them, are now, after the lapse of more than seventy years, sought to be avoided. Those great and good men foresaw that troublous times would arise, when rulers and people would become restive under restraint, and seek by sharp and decisive measures to accomplish ends deemed just and proper; and that the principles of constitutional liberty would be in peril, unless established by irrepealable law. The history of the world had taught them that what was done in the past might be attempted in the future. The Constitution of the United States is a law for rulers and people, equally in war and in peace, and covers with the shield of its protection all classes of men, at all times, [71 U.S. 2, 121] and under all circumstances. No doctrine, involving more pernicious consequences, was ever invented by the wit of man than that any of its provisions can be suspended during any of the great exigencies of government. Such a doctrine leads directly to anarchy or despotism, but the theory of necessity on which it is based is false; for the government, within the Constitution, has all the powers granted to it, which are necessary to preserve its existence; as has been happily proved by the result of the great effort to throw off its just authority... http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=US&vol=71&invol=2
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If even that.
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Bit of turnabout -- upper-crust inbreeding seems to have taken its toll on the bride this time.
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Boner and wet spot for sure! The zankiegrance tumblr I noted above says it was because Zach had a wet dream. Hmm...
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Glad you approve.
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Truly tasteless jokes... http://www.yotta.com/rechumor/mommy.txt
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Missed this one! http://textsfromhillaryclinton.tumblr.com/image/20606518140