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Columbia Space shuttle documentary |
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Trap junior 
Robbie Keane 
YBIG Minister of Doom & Gloom Joined: 25 Jan 2010 Location: Irish Riviera Status: Offline Points: 39860 |
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 Topic: Columbia Space shuttle documentaryPosted: 22 Feb 2024 at 12:03am |
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On BBC2 now. Very interesting. Remember this well unlike the Challenger one in 1986. If part of the heat shield was damaged after take off (which cause d them to disintegrate re-entering the Earth's atmosphere why did it not disintegrate exiting the Earth's atmosphere? NASA look like they have a history of cutting corners on safety. Went ahead in 1986 knowing disaster was quite likely.
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lassassinblanc
Paul McGrath 
Cheese, it’s not just for eating Joined: 27 Sep 2010 Location: Clairefontaine Status: Offline Points: 16478 |
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Posted: 22 Feb 2024 at 12:13pm |
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Could have been due to the angles they were exiting and entering at the two specific times.
Also When you're leaving Earth's atmosphere, you are slowest where the atmosphere is the thickest (near the ground). You speed up as you go up, while the atmosphere is thinning out, which means air resistance and compression of the atmosphere is not as significant. In that process of slowing down from the atmosphere, the spacecraft heats up a lot; there is both air resistance/friction and compression of air affecting the spacecraft, as it is traveling so fast that the air in front can't get out of the way fast enough, and so compresses. Resistance/friction and compression both increase temperatures, which directly heats up the spacecraft to a ridiculous degree. Another way of looking at it is that the spacecraft is losing both velocity (kinetic energy) and height (potential energy) the entire way down; that energy has to go somewhere, so it gets turned into heat.
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Trap junior
Robbie Keane
YBIG Minister of Doom & Gloom Joined: 25 Jan 2010 Location: Irish Riviera Status: Offline Points: 39860 |
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Posted: 23 Feb 2024 at 1:52am |
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Good stuff. Honours Physics yeah?
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lassassinblanc
Paul McGrath
Cheese, it’s not just for eating Joined: 27 Sep 2010 Location: Clairefontaine Status: Offline Points: 16478 |
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Posted: 23 Feb 2024 at 7:10am |
Would say that's ordinary level but yes
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Trap junior wrote: