Why does the shuttle throttle on ascent?

"Brian Gaff" wrote

Yes, and it is also why the shedding foam can only do serious damage
within the lower atmosphere, as the drag cannot decelerate the chunks
enough to strike with enough force to do harm at that altitude.

Sorry, but you got that one wrong.

The foam does the damage because of the high speed that it has when it hits
the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary atmosphere
slowing the foam so effectively and rapidly, that causes the relative
closing speeds of the now nearly stationary foam hitting the speeding
shuttle.
--
Jim in NC

Morgans writes:

"Brian Gaff" wrote

Yes, and it is also why the shedding foam can only do serious damage
within the lower atmosphere, as the drag cannot decelerate the chunks
enough to strike with enough force to do harm at that altitude.

Sorry, but you got that one wrong.

The foam does the damage because of the high speed that it has when it hits
the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary atmosphere
slowing the foam so effectively and rapidly, that causes the relative
closing speeds of the now nearly stationary foam hitting the speeding
shuttle.

That's what he said.

--
Transpose mxsmanic and gmail to reach me by e-mail.

Mxsmanic wrote:
The foam does the damage because of the high speed that it has when it hits
the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary atmosphere
slowing the foam so effectively and rapidly, that causes the relative
closing speeds of the now nearly stationary foam hitting the speeding
shuttle.


That's what he said.

Actually, even with no atmosphere around the foam would still move
rearwards- because the Shuttle is still accelerating after it falls off.

Pat

Pat Flannery wrote:



Mxsmanic wrote:

The foam does the damage because of the high speed that it has when
it hits the shuttle.

If there was no drag, the foam would not hit with any force; it would
be going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary
atmosphere slowing the foam so effectively and rapidly, that causes
the relative closing speeds of the now nearly stationary foam hitting
the speeding shuttle.



That's what he said.


Actually, even with no atmosphere around the foam would still move
rearwards- because the Shuttle is still accelerating after it falls off.

The foam wouldn't move rearwords...the shuttle would move forwards.

Taylor wrote:

The foam wouldn't move rearwords...the shuttle would move forwards.

Well, if you're going to split hairs, both the foam and the Shuttle
would still be moving forwards- it's just that the Shuttle would still
be gaining velocity and the foam traveling forwards at whatever velocity
it fell off at.

Pat

In article ,
says...

"Brian Gaff" wrote

Yes, and it is also why the shedding foam can only do serious damage
within the lower atmosphere, as the drag cannot decelerate the chunks
enough to strike with enough force to do harm at that altitude.

Sorry, but you got that one wrong.

The foam does the damage because of the high speed that it has when it hits
the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary atmosphere
slowing the foam so effectively and rapidly, that causes the relative
closing speeds of the now nearly stationary foam hitting the speeding
shuttle.

Isn't that exactly what he said?

--
Duncan

"Morgans" wrote in message
...

"Brian Gaff" wrote

Yes, and it is also why the shedding foam can only do serious damage
within the lower atmosphere, as the drag cannot decelerate the chunks
enough to strike with enough force to do harm at that altitude.

Sorry, but you got that one wrong.

The foam does the damage because of the high speed that it has when it
hits the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary
atmosphere slowing the foam so effectively and rapidly, that causes the
relative closing speeds of the now nearly stationary foam hitting the
speeding shuttle.
--
Jim in NC


OK, now I'm trying to figure out how to insert a magical, imaginary conveyor
belt into this scenario. :-)

TP in FL (Go Gators!)

"muff528" wrote in message
news:z4Coh.2414$%Q4.1156@trnddc06...

"Morgans" wrote in message
...

"Brian Gaff" wrote

Yes, and it is also why the shedding foam can only do serious damage
within the lower atmosphere, as the drag cannot decelerate the chunks
enough to strike with enough force to do harm at that altitude.

Sorry, but you got that one wrong.

The foam does the damage because of the high speed that it has when it
hits the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary
atmosphere slowing the foam so effectively and rapidly, that causes the
relative closing speeds of the now nearly stationary foam hitting the
speeding shuttle.
--
Jim in NC


OK, now I'm trying to figure out how to insert a magical, imaginary
conveyor
belt into this scenario. :-)

Please tell me you're not referring to that silly Straight Dope thing on a
plane on a conveyor belt.



TP in FL (Go Gators!)

"Greg D. Moore (Strider)" wrote in message
ink.net...

"muff528" wrote in message
news:z4Coh.2414$%Q4.1156@trnddc06...

"Morgans" wrote in message
...

"Brian Gaff" wrote

Yes, and it is also why the shedding foam can only do serious damage
within the lower atmosphere, as the drag cannot decelerate the chunks
enough to strike with enough force to do harm at that altitude.

Sorry, but you got that one wrong.

The foam does the damage because of the high speed that it has when it
hits the shuttle.

If there was no drag, the foam would not hit with any force; it would be
going the same speed as the shuttle.

When a chunk of foam falls off, it is the drag of the stationary
atmosphere slowing the foam so effectively and rapidly, that causes the
relative closing speeds of the now nearly stationary foam hitting the
speeding shuttle.
--
Jim in NC


OK, now I'm trying to figure out how to insert a magical, imaginary
conveyor
belt into this scenario. :-)

Please tell me you're not referring to that silly Straight Dope thing on a
plane on a conveyor belt.


I don't know what you're talking about