Space Shuttle.

Ron Lee wrote:

The same amount of fuel that was needed to accelerate it in the first
place, plus lots more to get that extra fuel up.

Actually not the same amount...not even close. You only have to lower
the perigee such that you reenter on the proper trajectory whereas
going up you have to get into a circular orbit

How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?


--
Jim Pennino

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wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

Ron Lee

Ron Lee wrote:
wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

And thus we have come full circle and forgotten the original question,
which was why does the shuttle have to land so fast.


--
Jim Pennino

Remove .spam.sux to reply.

wrote in message
...
Ron Lee wrote:
wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

And thus we have come full circle and forgotten the original question,
which was why does the shuttle have to land so fast.


--

We are certainly getting better at dragging discussions off topic. In the
old days it used to take as much as a hundred posts to come full circle, but
today we can accomplish it in as little as dozen or so.

People that live in reality have things like "speed dating", here we are
limited to things like "speed drifting".

In article , wrote:

Ron Lee wrote:
wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

And thus we have come full circle and forgotten the original question,
which was why does the shuttle have to land so fast.

The original question was answered way back earlier in the thread.

--
Bob Noel
(goodness, please trim replies!!!)

Bob Noel wrote:
In article , wrote:

Ron Lee wrote:
wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

And thus we have come full circle and forgotten the original question,
which was why does the shuttle have to land so fast.

The original question was answered way back earlier in the thread.

Yes it was, and the above is part of the answer.

As I said, we have come full circle.

--
Jim Pennino

Remove .spam.sux to reply.

wrote:

Ron Lee wrote:
wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

And thus we have come full circle and forgotten the original question,
which was why does the shuttle have to land so fast.

Jim here is the original post. Has nothing to do with landing:

"Just watched a show on the Columbis disaster, and a question came to
me.

Why does the shuttle have to be travelling so fast to re-enter the
atmosphere?"

Ron Lee

Ron Lee wrote:
wrote:

Ron Lee wrote:
wrote:
How do you get rid of all the velocity than builds up as you decend
through near vacuum and your energy of postition becomes energy of
motion?

Yes potential energy becomes kinetic energy and that is taken care of
by friction during reentry.

And thus we have come full circle and forgotten the original question,
which was why does the shuttle have to land so fast.

Jim here is the original post. Has nothing to do with landing:

"Just watched a show on the Columbis disaster, and a question came to
me.

Why does the shuttle have to be travelling so fast to re-enter the
atmosphere?"

If the shuttle re-enters the atmosphere, what maneuver is it going to
performing other than landing since at that point it has little to no
fuel, is a brick until the air gets thick, a glider thereafter, and
nowhere to go but down?


--
Jim Pennino

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If the shuttle re-enters the atmosphere, what maneuver is it going to
performing other than landing since at that point it has little to no
fuel, is a brick until the air gets thick, a glider thereafter, and
nowhere to go but down?

Jim, the original question is as stated previously. That the Shuttle
will land after reentry is not the point.

Ron Lee

Ron Lee wrote:

If the shuttle re-enters the atmosphere, what maneuver is it going to
performing other than landing since at that point it has little to no
fuel, is a brick until the air gets thick, a glider thereafter, and
nowhere to go but down?

Jim, the original question is as stated previously. That the Shuttle
will land after reentry is not the point.

Ron Lee

And once again we have been saved from the horrors of paraphrasing by
the courageous Captain Semantics and his trusty sidekick The Punctuation
Kid.

Having been suitably chastised, I scurry in search of a multi-windowed
newsreader to ensure every turn of a phrase, nay every letter and comma,
is 100% pristine in any followup.

Once the shuttle pilot hits the button to start the retro burn, you can
call it a de-orbit burn, reentering the atmosphere, landing, going down,
or break out the skillet and pork chops mom 'cause I'm coming home.

--
Jim Pennino

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