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Thread:   Nukes forever |
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Thread Status: Active Total posts in this thread: 17
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Suggest you do your research
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges: 
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Suggest you do your research I already did - I watched the documentary and reiterated the information precisely. There's nothing mysterious about a ballistic trajectory. Anything falling through the atmosphere only with the help of gravity, will reach a terminal velocity based on aerodynamics and the force of gravity. I can ride a rocket to 30,000 feet and jump off. Will the speed of my descent depend in any way on the speed I was traveling at the time I jumped off? No. The momentum of the flight will carry me higher, but once you're above a couple thousand feet, your terminal velocity is going to be pretty much the same either way. So whether I fall from 30,000 feet or 40,000 feet is irrelevant - it's going to be the same size splat if my parachute doesn't open.   |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Do your research, then reply as 60,000 mph is waffle as it will shoot you past the moon: http://en.wikipedia.org/wiki/ICBM
----------------------------------------Flight phases The following flight phases can be distinguished: * boost phase — 3 to 5 minutes (shorter for a solid rocket than for a liquid-propellant rocket); altitude at the end of this phase is typically 150 to 400 km depending on the trajectory chosen, typical burnout speed is 7 km/s. * midcourse phase — approx. 25 minutes — sub-orbital spaceflight in an elliptic orbit; the orbit is part of an ellipse with a vertical major axis; the apogee (halfway the midcourse phase) is at an altitude of approximately 1200 km; the semi-major axis is between 3,186 km and 6,372 km; the projection of the orbit on the Earth's surface is close to a great circle, slightly displaced due to earth rotation during the time of flight; the missile may release several independent warheads, and penetration aids such as metallic-coated balloons, aluminum chaff, and full-scale warhead decoys. * reentry phase (starting at an altitude of 100 km) — 2 minutes — impact is at a speed of up to 4 km/s (for early ICBMs less than 1 km/s); see also maneuverable reentry vehicle. See also: Missile Defense Agency, missile defense#Classified by trajectory phase, and Countermeasure 7km/s is 25,000 kmh. Added: Interesting the Baron von Münchhausen association you made
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----------------------------------------Please help to make the Forums an enjoyable experience for All! [Edit 1 times, last edit by Sekerob at Aug 17, 2007 5:35:24 AM] |
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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I don't know what point you're trying to make. All I said is that the rocket travels at 60,000mph during the boost phase - and it does. All you've done is determine that the terminal velocity is between 1 and 4 kps.
----------------------------------------The 7kps figure from Wikipedia isn't exactly authoritative. I found another article that sets the maximum speed at 15,000 mph Missile defense. However I replayed the video at least three times and I'm positive that they said 60,000mph. I thought that was high too but figured that since the boost phase only lasts a few minutes, that explained why it didn't go into orbit. If the people who did the documentary got it wrong, there's nothing I can do about that. Edit - I am slightly dyslexic so there is a chance that they said something like 16,000 but I don't think so - as I've already said - I did listen to it at least 3 times. [Edit 1 times, last edit by twilyth at Aug 17, 2007 5:52:16 AM] |
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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As long as we're critiquing the accuracy of the show's research, I should mention that the Trident and Trident II are both submarine launched and the the Trident II is less than half (44ft) the size of the missile they used in the show. I thought maybe I had gotten that wrong too so I searched for other ICBM's starting with T and found the Titan II - which matches the specs of the missile in the show. Did I get that wrong or did the producers? I don't know - I'm almost positive they said Trident, but if you've been following my posts today, I haven't been doing too well.
----------------------------------------Anyway I'll definitely watch the show again - maybe they'll put in some closed captioning so I can double check what I'm hearing. The real point though is that in a ghoulish sort of way, these are beautiful and amazing machines. And there used to be thousands of them dotting the landscape. The history of the nuclear arms race is truly extraordinary. |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
twil, point is if it does not make sense, find alternate source(s).
----------------------------------------I'm one sided hearing impaired, really. Before someone tells me a price i always turn the bad ear. When asking again, sometimes the repeat is a lower one :D For the funny bone Aural Dyslexia, or Senile Dog Matter. 09 November 2001 Have you ever been talking to a friend, and they say something that you hear as distinct words, but words which make no sense at all? Then you repeat what you heard, just to clarify that your friend uttered such utter nonsense, and they say "What???" and you both fall down laughing at the absurdity of it all, and in the hysterics your friend forgets completely what they said in the first place? Dyslexia, is associated to something called Aural Dyslexia which is suggested as playing a role in 60% of dyslexia cases according a US study.
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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Thanks Sek. Today was particularly bad. If I really did screw up both the Trident/Titan thing in addition to the max speed (i.e., turrns out to be something like 16,000 mph), I'm going to be very upset. I have this sort of problem quite regularly, but the frequency lately has been very high. For example, I'm trying to open an estate bank account and had to fax some sensitive documents. I copied down the fax number and sent everything to that number. It turned out to be a fax, but one that had no association with the bank. So either the bank rep gave me the wrong number or I copied it down incorrectly. It's extremely annoying and makes people think you're a complete flake. I am pretty flaky (one of the reasons I don't have a job), but I at least try to get my facts right. Guess that just wasn't happening today.
----------------------------------------My DVR will eventually catch this show again - history channel reruns things forever. I will go over the missile silo tour VERY carefully. Maybe these lapses are due to the Alzheimer's meds I'm taking. With a lot of psychotropics, symptoms can sometimes get worse before they get better. Plus I've been taking a different amphetamine lately, so that could also be part of the problem. Anyway, not to bore anyone (too late) I'll leave it at that. |
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