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Old 07-17-2019, 03:48 PM   #16
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Default Re: T Minus 30 minutes, 50 years ago today

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Originally Posted by Snakeman View Post
A rifle round that travels 3000ft per second is traveling at less than mach 3 or 2000mph.The escape velocity to leave Earth is Mach 33 or roughly 25000 mph.A little bit faster than a rifle round.

I think he's talking about when all 3 stages are still joined together. The real speed comes after the bottom 2 drop off.


That rocket produced 160 million horsepower. Think about that for a minute.
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Old 07-17-2019, 03:56 PM   #17
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Default Re: T Minus 30 minutes, 50 years ago today

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Originally Posted by TheRevII View Post
I think he's talking about when all 3 stages are still joined together. The real speed comes after the bottom 2 drop off.


That rocket produced 160 million horsepower. Think about that for a minute.
He probably did,my bad.I'll leave this here.

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Old 07-17-2019, 06:17 PM   #18
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Cool Re: T Minus 30 minutes, 50 years ago today

Projection on the Washington Monument


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Old 07-18-2019, 05:30 AM   #19
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Default Re: T Minus 30 minutes, 50 years ago today

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Still waiting on one of those other countries which are just as good as the U.S. to make the trip...

One small step for man, one giant leap for a countries ego.
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Old 07-18-2019, 09:57 AM   #20
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Default Re: T Minus 30 minutes, 50 years ago today

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Originally Posted by Topfun99 View Post
The "hold downs" were a series of mechanisms restraining the rocket on the pad. I always get a kick when I'm listening to "Moon Machines" when they say:

"When the motors are ready, they send a signal to the hold downs - let me go."
This is a great video that shows the hell that happens at the base of a launch.


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Old 07-18-2019, 10:09 AM   #21
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Default Re: T Minus 30 minutes, 50 years ago today

I went to the Houston space center recently. Go and see the saturn v on display there. Fucking enormous, and was scheduled to be launched had the program continued.
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Old 07-18-2019, 10:33 AM   #22
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Default Re: T Minus 30 minutes, 50 years ago today

I caught the PBS special last night on Apollo 8 (I think it was) and I was blown away by how the Saturn V F-rocket engines were blowing up left and right on test stands and by essentially trial & error they determined that several inch deep "baffles" were needed to keep the flame fronts from mingling in the nozzles. In other words it was seat of the pants "hot-Rod" engineering that differentiated between the rocket engines repeatedly blowing up and being extremely reliable. The mighty F-rocket engines were used for decades as designed except for minute tweaks.

They even detonated a bomb inside a running test engines nozzle to initiate disrupted flame fronts and the "baffles" suppressed disrupted flame fronts.

For sure it would have been years to get away from computers that filled a room to the one that "had to fit" in the file-box sized space in the capsule.

The way the astronauts communicated with the computer was primitive torture.

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Old 07-18-2019, 10:53 AM   #23
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Default Re: T Minus 30 minutes, 50 years ago today

I have a feeling at around 02:20 when the narrator is stating the "cool gas" is coming from the turbine pump, the gas is put into the engine around the nozzles."
I've had hands-on those nozzles at KSC. The magnificent metal nozzles are actually hollow about an 1" thick, made of amazingly welded tubes and the gas flows within the nozzle wall to cool them. The metal being like 5,000F facing the flames and flowing cryogenic gas inside them. The metals literally SCREAMING no doubt at the temperature variation within them.



Quote:
Originally Posted by redwhite View Post
This is a great video that shows the hell that happens at the base of a launch.

https://youtu.be/DKtVpvzUF1Y

.


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Old 07-18-2019, 11:46 AM   #24
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Default Re: T Minus 30 minutes, 50 years ago today

Back in my school days, remember the teacher showing us how this stuff worked saying a great thing for America, now 35 yrs later not one word about how we did things or how great our country was, I was always fascinated by space program, they don't teach kids nor are they interested in space
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Old 07-18-2019, 12:08 PM   #25
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Default Re: T Minus 30 minutes, 50 years ago today

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Rocket Park at JSC. I drive by this stuff almost every day on the way into work. This engine, a Mercury Redstone rocket, and a Little Joe II rocket, are outside in the weather. I wish they would put these under cover, like they did the Saturn V about 10 or 12 years ago.
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Old 07-18-2019, 12:19 PM   #26
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Default Re: T Minus 30 minutes, 50 years ago today

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One small step for man, one giant leap for a countries ego.
It was/is a giant leap for this countryís ego! Rightfully so. Would you have preferred Russia?
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Old 07-18-2019, 12:22 PM   #27
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Default Re: T Minus 30 minutes, 50 years ago today

Back in the late 70s I wandered around the Space Center. Never forget the dozen or so standing-up missiles from Red-Stones, Mercury's etc with near knee deep grasses growing around the whole area. Back then "history" was not even in NASA's vocabulary. My former college roommate (a true rocket scientist) was with me and I recall him pointing out the hefty "vanes" that sliced through the flame cone to direct the rocket and him saying that was primitive Nazi V2 design.
Regardless when I say I "hands-on" those rocket engines it may have been the very one pictured. Back when you could just walk up to them and perhaps even climb up them if you were that much of an idiot.
To look at the welding/fabrication and design to flow massive volumes just makes any hot-rodder drool. Flowing gasses, combustion and can I say horse-power? .................

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Old 07-18-2019, 12:37 PM   #28
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Default Re: T Minus 30 minutes, 50 years ago today

Watching the PBS Apollo TV last night they stated they were headed to the moon at 24,000 mph. I'm thinking FUCK at some point they need to STOP at the end of the three days when they get to the moon.
It's confounded me grasping the cold of space. I noticed flying in a Lear Jet that the bolt securing my seatbelt by the floor/wall was covered with frost. Can't imagine how fucking cold it is in "space". I presume they heat the crew quarters and what about insulation?

Quote:
Originally Posted by Snakeman View Post
A rifle round that travels 3000ft per second is traveling at less than mach 3 or 2000mph.The escape velocity to leave Earth is Mach 33 or roughly 25000 mph.A little bit faster than a rifle round.
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Old 07-18-2019, 12:45 PM   #29
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Default Re: T Minus 30 minutes, 50 years ago today

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Originally Posted by qikbbstang View Post
Watching the PBS Apollo TV last night they stated they were headed to the moon at 24,000 mph. I'm thinking FUCK at some point they need to STOP at the end of the three days when they get to the moon.
It's confounded me grasping the cold of space. I noticed flying in a Lear Jet that the bolt securing my seatbelt by the floor/wall was covered with frost. Can't imagine how fucking cold it is in "space". I presume they heat the crew quarters and what about insulation?
ďAbsolute zeroĒ is about -273 C. space is just slightly above that, slightly. Thatís absence of thermodynamic motion, basically because space is a vacuum...there are no molecules to move around and heat up. Because itís a vacuum, itís also insulated in that warm item wonít lose its heat nearly as rapidly as in a cold environment on Earth where there is an atmosphere.
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Old 07-18-2019, 12:46 PM   #30
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Default Re: T Minus 30 minutes, 50 years ago today

How could we send people to the moon 50 years ago but no one can do it in todayís age ?maybe because the moon landing was staged
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