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Originally posted by darkbluesky
Back to Robert Turcios, Why does CIT take his very weak "lift up" comment and turn it into the entire thrust of the "no impact theory" but totally dismiss his testimony that the airplane passed over the corner of the canopy?
Sgt Brooks stated that as the airplane passed over these trees they were blown around by the wake turbulence:
LaBtop -please refer to my response to John Lear regarding your thoughts about altitude, About air density....The recorded vertical acceleration loads apply to loads passing through imaginary lines running perpendicular to the top of the wings, vertical stabilizers and cabin deck, the resistance to the air, based on airspeed, has nothing to do w/ vertical g loads.
Originally posted by LaBTop
g210b, your orange flightpath under your point 3, does not down ONE of the 5 official downed light poles.
Btw, do you see now how totally impossible the 2 proposed short, sharp turns of darkbluesky are?
Originally posted by LaBTop
one last very important technical detail, because if some readers still think your proposed two fast turns were possible at all, I still have to address your last remark :
LaBtop -please refer to my response to John Lear regarding your thoughts about altitude, About air density....The recorded vertical acceleration loads apply to loads passing through imaginary lines running perpendicular to the top of the wings, vertical stabilizers and cabin deck, the resistance to the air, based on airspeed, has nothing to do w/ vertical g loads.
Exactly.
But it has very much to do with the only important issue we were in fact discussing for days already: endurable mechanical stress on the airframe in total and the weakest parts of it, the wings.
If the proposed aerobatic features of the plane in your combined north passage of the Citgo gas station and the last part of the official flightpath, including all downed light poles, were at all possible without failure of the wings in total or parts of them, and/or drifting away by the plane from your proposed first right turn direction, both in the x- and y axis plains (vertical and horizontal axis).
Just a simple question:
Can you imagine the difference in mechanical stress on the wings when a huge airplane drops from very thin air, through increasingly denser air, and imagine the graph depicting solely the wing stress factor increase over the whole gradient between very thin air and ground level air density?
I'm sure you understand that.
And that was the only important point of discussion, can a 757 at near ground level perform such an incredible sharp turn over the span of that short distance, at all, without major damage to its wings.
And then I am willing to include all your now newly proposed coloured possible flight paths.
Originally posted by LaBTop
one last very important technical detail, because if some readers still think your proposed two fast turns were possible at all, I still have to address your last remark :
LaBtop -please refer to my response to John Lear regarding your thoughts about altitude, About air density....The recorded vertical acceleration loads apply to loads passing through imaginary lines running perpendicular to the top of the wings, vertical stabilizers and cabin deck, the resistance to the air, based on airspeed, has nothing to do w/ vertical g loads.
Exactly.
But it has very much to do with the only important issue we were in fact discussing for days already: endurable mechanical stress on the airframe in total and the weakest parts of it, the wings.
If the proposed aerobatic features of the plane in your combined north passage of the Citgo gas station and the last part of the official flightpath, including all downed light poles, were at all possible without failure of the wings in total or parts of them, and/or drifting away by the plane from your proposed first right turn direction, both in the x- and y axis plains (vertical and horizontal axis).
Just a simple question:
Can you imagine the difference in mechanical stress on the wings when a huge airplane drops from very thin air, through increasingly denser air, and imagine the graph depicting solely the wing stress factor increase over the whole gradient between very thin air and ground level air density?
I'm sure you understand that.
And that was the only important point of discussion, can a 757 at near ground level perform such an incredible sharp turn over the span of that short distance, at all, without major damage to its wings.
And then I am willing to include all your now newly proposed coloured possible flight paths.
Originally posted by LaBTop
one last very important technical detail, because if some readers still think your proposed two fast turns were possible at all, I still have to address your last remark :
LaBtop -please refer to my response to John Lear regarding your thoughts about altitude, About air density....The recorded vertical acceleration loads apply to loads passing through imaginary lines running perpendicular to the top of the wings, vertical stabilizers and cabin deck, the resistance to the air, based on airspeed, has nothing to do w/ vertical g loads.
Just a simple question:
Can you imagine the difference in mechanical stress on the wings when a huge airplane drops from very thin air, through increasingly denser air, and imagine the graph depicting solely the wing stress factor increase over the whole gradient between very thin air and ground level air density?
I'm sure you understand that.
And that was the only important point of discussion, can a 757 at near ground level perform such an incredible sharp turn over the span of that short distance, at all, without major damage to its wings.
And then I am willing to include all your now newly proposed coloured possible flight paths.
Originally posted by LaBTop
Also have a look again at g210b's first post on this page 14, above.
He said : "" 1) My sharpest turns (heavy banking 70 degree and more) with a 757 at high speed in FS2004 "".
FS2004 means Microsoft Flight Simulator 2004.
Now look at the sharpest arc he could manage to fly at high speed (which speed he doesn't say, please provide additionally, g210b).
Q) The roll rate feels slow, is this correct?
A) Based on what I have personally felt in 6-axis simulators,
yes, the roll rate is accurate.
Keep in mind, what you do not see in videos:
- the true Boeing yoke, pedals, and rudders have engineered resistance
in the controls
- the harder you crank over the yoke, for example, the harder the
progressive resistance
- after you put in an input, there is a slight delay as the
control surface (in this case, the aileron) pushes the
aircraft over to 1 side
- to stop the motion and neutralize out, you must put in
opposite movement into the yoke, again, with resistance,
and with delay.
So what you see, is not what you *feel*. The old videos
with Tex Johnson shows a 707 barrel rolling in a demonstration flight
at about 15 secs wing-level to wing-level. I put this into
737EZ FDE, although you will never barrel-roll a commercial airliner,
and at only 15 secs a roll, you can make 4 complete barrel rolls
a minute. In a 737... So much for realism...
An F-18 hornet has a 36,000 lb max fuel weight wet.
737-800 weighs 140,000 lb full wet.
767-300ER weighs 420,000 lb full wet.
More than 4 barrel rolls per minute is easy to achieve with an F-18.
Not so for a heavy 767. FDE should reflect this.
So speaking of realism, the feeling of mass, inertia and delay are not
accurately captured from a video. You must *feel* this, which makes the true movement more than a mere 15 secs.
Please read your FAQ section of the Ops Manual for more information.
Originally posted by darkbluesky
I'd like to ask Jack, and anyone else, to repsond to a few statements and a couple of questions.
Why should we accept anything Sgt. Legasse says since he was totally wrong regarding which light poles were damaged? approx (+58:00 in the video)
But then again, If you want to make him a credible witness, why not accept his firm and clear statement made at +49:02 when asked by the interviewer "Did you see the plane pick up at all?" His answer..."No...no." And make no mistake, you could tell by his tone he meant it did not pick up, not that he didnt see it pick up.
I aslo wonder why Robert Turcios flight path is dismissed? He stated with no reservation that the plane passed over the corner of the canopy and the two adjacent trees. Shown here in yellow:
"I saw it lift... pick up a little...go up a little bit headed towards the Pentagon"
A B-52H plane crash.
The aircraft banked past 90 degrees, stalled, clipped a power line with the left wing and crashed. There were no survivors out of a crew of four field grade officers.
24th June 1994 at Fairchild Air Force Base.
1. You're so wrong. Hitting the power lines didn't bring the aircraft down. Before he hit the power lines the left wing was totally and completely stalled and all hope was lost. He wasn't attempting to land either, he was showing the plane off for a crowd. He actually lost control after the first left hand turn, he had throttled down the engines to try and pull a very tight left. The left wing stalls approximately 4 seconds after initiating the first left.
2. you're all wrong! he was SUPPOSED to be doing this manoeuvre that low - it's a 60-degree turn around a point @ 250' above the ground. He was just too slow for the amount of bank he had on the second turn, and his left wing (being at a higher angle-of-attack in the turn) completely stalled and that caused him to roll past 90 degrees and crash. ANY CFI will tell you that this was an "accelerated stall."
3. You're all wrong. Colonel Holland had a reputation as a hot-dogger and his recklessness was reported and he was disciplined for it. The man who reported him was co-pilot that day. It was investigated as a murder-suicide.
4. Either way you gotta be crazy to attempt that manoeuvre, or failing that suicidal.