SpaceX Tuesday...
Discussion
Eric Mc said:
The first stage engines of most rockets cut out after around 2 1/2 minutes of power. This usually equates to an altitude of around 30 - 40 miles and a speed of under 5,000 mph. When the motors cut and the stage separates, it coasts on up for a minute or two with the speed decaying. Eventually the upward velocity reaches zero and it starts to fall back to earth. It then starts accelerating again purely due to acceleration under gravity.
The question I was asking is, is the speed it reaches as it falls back to earth high enough to generate sufficient heat to char the exterior.
The answer is Terminal VelocityThe question I was asking is, is the speed it reaches as it falls back to earth high enough to generate sufficient heat to char the exterior.
Eric, get the calculator out
http://en.wikipedia.org/wiki/Terminal_velocity
Or a simpler version
http://www.bbc.co.uk/schools/gcsebitesize/science/...
MartG said:
Thanks for that. It's quite strange seeing the transition from crazy activity to the gentle descent by parachute. Were there ever any similar shots for Apollo capsules re-entering the atmosphere? I'm guessing not due to heat amongst other things.That would be a picture of the second droneship that has just been finished to a newer improved design and this will be her first deployment.
The first one was called "just read the instructions" and according to Wiki has been returned to being a standard barge with some parts being reused in construction of a 3rd droneship (which will be the second of the new design)
http://www.nasaspaceflight.com/2015/06/spacex-augm...
The first one was called "just read the instructions" and according to Wiki has been returned to being a standard barge with some parts being reused in construction of a 3rd droneship (which will be the second of the new design)
http://www.nasaspaceflight.com/2015/06/spacex-augm...
Buzz84 said:
That would be a picture of the second droneship that has just been finished to a newer improved design and this will be her first deployment.
The first one was called "just read the instructions" and according to Wiki has been returned to being a standard barge with some parts being reused in construction of a 3rd droneship (which will be the second of the new design)
http://www.nasaspaceflight.com/2015/06/spacex-augm...
Aha. No wonder it looks so clean.The first one was called "just read the instructions" and according to Wiki has been returned to being a standard barge with some parts being reused in construction of a 3rd droneship (which will be the second of the new design)
http://www.nasaspaceflight.com/2015/06/spacex-augm...
Launch due at 15:21 today UK time http://www.spacex.com/webcast/
Edited by MartG on Sunday 28th June 10:54
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