Vi ricopio quello che ho appena letto sulla lista indicata. Un nuovo
iscritto spiega che sta “eseguendo ricerche personali” sull’incidente
del Columbia, fondandosi su molto lavoro di ricerca e arrivando a una
possibile causa del tutto diversa da quelle indicate dal CAIB.
Lo scritto è molto civile e pacato, e sono molto curioso di sapere
come verrà accolto dalla comunità: suppongo che farà discutere
parecchio.
Non posso giudicare il contenuto del testo, che però è scritto bene e
in alcuni punti anche molto (molto) tecnico. Però penso che possiamo riflettere un momentino su quanto sostiene questa persona. Volevo sapere cosa ne pensate anche voi.
ciao
Cristiano
Date: Tue, 20 Dec 2005 08:02:15 -0000
From: “columbiaaccidentinvestigation”
columbiaaccidentinvestigation@yahoo.com
Subject: Columbia’s accident, Possible Alternative Theories
Hello All, I am new to this group and happy I found some people to
discuss the causes of the Columbia breakup. I have reached a
possible alternative cause for the sts-107 mishap. My theory is
simply the Hydraulic System failed under the stress of maneuvering
the heaviest returning shuttle ever at (234,000 + lbs). I have lots
of research to back up my theory, and would like to discuss any and
all possibilities with interested persons.
The foam may have impacted the left wings leading edge, but I don’t
think it created the breech described by the caib. As you all know,
the caib’s theory is the Columbia’s wing was breeched by a chunk of
foam that was “shed” by the external tank at 82 seconds into the
mission. Then with a breeched the wing, the Columbia completed a 16
day mission, showing no ill effects until re-entry. That’s
equivalent to a man being shot; walking around for two weeks, then
dropping dead without leaving any blood traces any where". With the
only evidence of the shooting being a high resolution video showing
the bullet did hit the man, but nothing changed until two weeks
later.
I have a simple question, with a 14" diameter hole in the leading
edge of the left wing, how could the Columbia achieve a nominal
orbital insertion, (an orbit using the exact amount of fuel
planned)? Shouldn’t this hole, have created more atmospheric drag,
than was planned, requiring the Columbia to use more fuel than
planned to achieved it’s desired orbit?
Then a piece 14" in diameter flew away from the shuttle, after a
little more than a day in space with no major forces, or maneuvers to
dislodge it from it’s resting place. This piece could only be
described by the caib as a Mysterious Flight day 2 Object. This un-
nasa like finding was left as an unkown in the caib’s final report.
I believe this mysterious object, was a very small payload, that
departed at the proper time. This mysterious object was actually a
of miniature satellites starshine 4, containing another mini
satellite starshine 5. I reached this conclusion after discovering a
payload manifest from the Goddard space flight facility, which
described this missions payload with 1 extra thing, a satellite
designated starshine 2. The problem was this satellite launched
years ago (from a different shuttle), but this Goddard manifest was
for this flight, and this shuttle, as it included experiments only
found on this mission.
Two years of investigation has shown the Columbia’s hydraulic system
failed, as it returned the heaviest shuttle ever at 234,000 lbs. My
theory is based on the fact that com2plex, an experimental pump
failed, and was not used for a good part of the mission. The
deactivation of the pump caused the fuel not to be consumed at the
planned rate, and final amounts. This extra fuel located in the
extended duration pallet was not be dumped, and the Columbia’s
engineers struggled to calculate the return flight path and
parameters due to the changing estimated return weights as can be
noted in the mission management team notes. This excessive return
weight required more force applied by the elevons to move through
it’s planned s turns, and maintain course. The hydraulic system was
pushed to it’s limits, by the Columbia fighting harder and harder to
maintain course, it applied more hydraulic pressure to the move the
elevons against the increasingly dense atmosphere. Then like the
weak link in a chain, a hydraulic leak sprung in the hydraulic
system, causing a loss of flight control, and the vehicle broke apart
when it could not maintain it’s correct flight path. The leak
(possibly) formed in the hydraulic lines near the left landing gear
box, where it was detected by the increased temps registered by wings
internal sensors. The shuttles hydraulic fluids maximum temperatures
are much closer to those reported by the Columbia’s internal sensors
than say, plasma. The priority of flight control systems to keep the
crew and vehicle alive would require the shuttles operation beyond
desired the parameters of 210 deg, and 3000 psi in the shuttles
hydraulic system. Understanding the exact location of the leak will
probably explain some of the required maneuvers, as the shuttles
center of gravity would have been affected by the accumulating
hydraulic fluid.
I have the “in flight anomalies” and mission reports dating back to
sts-90. I think the recent mission timeline for Columbia (ov-102)
was sts-90, sts-93, refurbishment, sts-109, and finally sts-107. In
my research I found a pattern developing, related to problems, and
maintenance on the shuttles hydraulics, and hydraulic fluid cooling
systems. The work done by technicians the shuttles is tracked by the
Orbiter Processing Notes from KSC. These processing notes show the
Freon coolant loops requiring a lot of work to resolve the ifa that
occurred during sts-109. The Freon coolant loops are the in orbit
control for hydraulic fluid temperatures. The orbital processing
notes document work on one component by a technician inadvertently
causing damage to another component, something nasa describes
as “collateral damage” (I think). This is mentioned in the SIAST’s
independent report, as maintenance on a particular problem causing
more problems. STS-90 carrying the Chandra x-ray observatory had an
in flight anomaly as the #3 wsb stopped spraying during the landing.
The Columbia was used as the workhorse of the fleet lifting the
heaviest payloads up, putting the vehicles hydraulic system under
more and more duress. This is why I think an excessive return
weight could have pushed the system beyond safe parameters. The
SIAST also described a process called “wetting”, which is required to
keep the hydraulic line seals resilient when the shuttles have long
time spans between flights. This flight sts-107 was rolled back and
delayed at least a year, as the fleet was grounded for engine fuel
line problems. If the hydraulic line seals were not properly
serviced or “wetted” during the delays before Columbia’s sts-107
mission, a hydraulic leak is a documented possibility.
Starting on feb 1, 2003 this research was conducted by me, with the
sole purpose of finding a cause for the Columbia’s breakup. Although
this theory contradicts the findings of the caib, i believe the
results of my research are quite valid. There are volumes of
information I can send any interested party, and I welcome any civil
discussion about this theory and others, (including caib members).
This project is my research, with only my spare time, not a billion
dollars of equipment, and my family was the only team I could count
as board members.
Thanks, and take care.