Re: Discovery Landing - Charred Sides?

On entry, they fly a zero angle of sideslip, well, what the On-Board
software thinks is zero. But is it truely zero? On thing that might cause
the angle of sideslip to be none zero would be extremely high level winds
that aren't accounted for. How many entry groundtracks has the Shuttle
flown from ISS that land on the ascending portion of the orbit? Over the
Yucatan?

On Mon, 17 Jul 2006 20:19:50 +0000, Tom Kent wrote:

Here's Discovery landing in 2000, no major scorch marks:
http://www-pao.ksc.nasa.gov/kscpao/images/large/00pp1673.jpg

Here's Discovery taking off two weeks ago:
http://www-pao.ksc.nasa.gov/kscpao/images/large/06pp1463.jpg There's
some stuff, but not nearly as bad as the landing image. The majority of
the marks occoured on this mission, after liftoff, and while there may
be a cumlative aspect to them, something made them much more pronounced
this time than anything else I've seen.

Here's another image from today. Its of the other side of the orbiter:
http://www-pao.ksc.nasa.gov/kscpao/images/large/06pd1588.jpg The marking
makes a fairly abrupt stop along a line that runs about 20 degrees above
the wing. Makes me think that this happened while there were
aerodynamic effects on the orbiter (not in-orbit thruster firing or
something). My first guess is during re-entry since no one seems to
have noticed anything about this in orbit. The second guess though
would be something during SRB seperation. Did anything change with
respect to the airflow over the orbiter that would cause the SRB
seperation engines to deposit material on the orbiter? If this happened
would it cause that angle of a line over the wing?

Tom



"cole smith" <lcs1h@xxxxxxxxxxxx> wrote in message
news:UfudnV6iYpITQCbZnZ2dnUVZ_rednZ2d@xxxxxxxxxxxxxxx
Endeavor has seen fewer flights, and I think the charring is somewhat
cumulative. But it does look like it goes further up the sides than I
recall before. Someone should post more post-landing pics from other
flights (especially Discovery).

During the post-landing walk-around video inspection I noticed the
camera operator quite deliberately climbed up the stairs to the hatch
and videoed what looked like a lot of charring around the hatch door.
It may be normal but I haven't seen them do that before.

LCS

"Tom Kent" <thomas.m.kent@xxxxxxxxxx> wrote in message
news:J2K6HG.5D6@xxxxxxxxxxxxxxxxxx
I just watched the video of the landing, and i noticed that the sides
looked a lot more charred than normal. After quickly looking on NASA's
site for previous landing images I found one from STS112, the
comparison is remarkable. Is this a big deal? Has this been seen
before?

Comparison:
http://mcbain.teeks99.com/STS121LandingCompare.png

Tom




--
Craig Fink
Courtesy E-Mail Welcome @ WeBeGood@xxxxxxxxx
.

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