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Re: The eons old modus operandi [Re: bretwalda] #909691 01/10/09 12:33 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
AFAIK, there is no accurate flight path available other than what could be constructed using eyewitness accounts. If you want to reconstruct it, start with the closest witnesses and work your way through all of them - not just 13 who may not have had the best line-of-sight view. Here's 19 for you to start your search:

Eyewitness Accounts

Quote
Well - lets just stick with the NTSB one for your sake ...How exactly did the plane clear the VOR tower smack dab in the middle of this flight path - a few hundred yards from its final destination?


As stated, I don't think anyone has the "exact" flight path once the plane began to dive and turn in on the Pentagon - I suspect that only partial segments of the path can be agreed and I would not take the FAA or NTSB's account as anything more than an approximation with considerable room for error.

Quote
Was the plane already in its 'liquified' state at this point?


Here's where "Truthers" go off the rails - the choice of a word such as "liquified" is not a correct explanation of what happened - perhaps "violently and completely disintegrated" would have been better - but so-called Truthers jump on the use of "liquified" as if the fellow was intentionally saying that the plane turned into a pot of molten aluminum..... Maybe some of it did.

You've seen this video of an F4 crashing into a reinforced concrete wall - what would you call the resulting disintegration?

web page



Oh........ I found the plane for you:

[Linked Image]

Frank <img src="/forums/images/graemlins/cheers.gif" alt="" />


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: The eons old modus operandi [Re: FrankR] #909692 01/10/09 01:33 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
Now let's take a look at the altimeter and see what's used in a 757 instead of a Cessna 172.

I'm not familiar with flight data recorders, but I assume either digital instruments or analog-converted-to-digital signals are used to record the data.

Here's the NTSB's summary of the data recorded for AA Flight 587 that crashed in 2001:

web page

Note that as with Flight 77, NTSB does not correct the data for pressure altitude.

Note that one of the instruments used for altitude reporting to the FDR is a radio altimeter - and that the radio altimeter's data points were found to be "erroneous".

One of the digital instruments used in a 757 is a Rockwell-Collins LRA-900 Low-range Radio Altimeter:

LRA-900

Apparently, one of the issues with these altimeters is inaccuracy when a plane is doing anything other than flying straight and level - here's a patent application that describes - and hopes to resolve - the problem:

Quote
0001]In radar altimeter operation, during aircraft roll or pitch maneuvers, it is possible for the altimeter track (range) gate to slide off the true altitude because the signal level is not maintained with sufficient accuracy. When the aircraft banks errors in the altitude can be generated due to coupled-control-loop induced positioning errors between the track gate and the level gate that are positioned relative to each other at a fixed separation. Likewise, variations in the terrain with respect to the attitude of the aircraft cause errors or inaccuracies due to the coupled-control-loop induced positioning errors. In the worst case, these positioning errors can result in coupled control loop oscillations that result in oscillations in the altitude value the radar altimeter reports. Such errors can cause unsafe flying conditions especially for aircraft that bank at large angles or fly over steep terrain, especially if these occur at low altitudes and the size of the altitude oscillations is a large fraction of the actual altitude.


Patent Description

WRT Flight 77, here's one electrical engineer's opinion of the accuracy of the FDR:

Quote
The Final 1 to 2 Seconds

Given that the data was compressed, and synched, itÆs very likely that any frames that were not complete would be difficult to recover, if even recoverable at all. The implication of this is quite simple, and that is the FDR data in the CSV file ôruns outö well before the plane actually hits.

This means that 9:37:44 was the last, complete frame, gathered by the recorder. That puts the likely time of impact in the 9:37:45-6 range, and possibly even into the 9:37:46-7 timeframe. The presence of 9:37:46 in this data suggests that its timestamp may have made it onto the tape. How is that possible if 9:37:45 is not a complete frame? ThatÆs a good question, but a reasonable hypothesis has to do with the storage mechanism used. Solid State Recorders, like all medium, are quite unpredictable if they fail during write operations. The actual area being used to record data can very easily be corrupted if power fails while writing. ItÆs plausible that the crash caused problems in and around this local area of data, causing corruption of the 9:37:45 data frame (again, changing a single bit in a synch word is enough to cause software to completely choke).

The moral of the story here is that the FDR data runs out anywhere from up to 2 seconds before the plane actually crashed into the Pentagon.


web page

So, here we have a possible combination of:

1) Electronic latency (historesis) that cannot record in exact real-time. If the last 1-2 seconds of flight data are not recorded, then at 500mph the potential error is between 733-1466' - obviously not straight down as a loss of altitude, but certainly some loss of altitude at the end of the flight.

2) Inaccuracy of the reported altitude due to aircraft attitude and control input just prior to the crash.

Face it, Phil..... if reasonable people thought there was any "truth" in the claims that Flight 77 didn't hit the Pentagon, we would have had full exposure long ago.

Truthers looking for that plane remind me of O.J. Simpson looking for Nicole's killer. <img src="/forums/images/graemlins/lol.gif" alt="" />

Where is that plane?

Frank


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: The eons old modus operandi [Re: FrankR] #909693 01/10/09 03:19 PM
Joined: May 2007
Posts: 4,628
hazy_daze Offline
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This is all very entertaining. Really, it is. But, every time I look at this thread, I envision bretwalda as the character Mel Gibson played in the movie Conspiracy Theory. In the movie, he was right about alot of stuff, which, I'm sure there are possibilities that Phil is as well. I just find this banter very humorous. They're all theories, on both sides. "Facts", as we all know, can be fabricated. But, I too find it difficult to wrap my brain around a conspiracy this big not being leaked with hard eveidence to substantiate the leak. Internet stories, supposed eyewitness accounts, video; all of it can be fabricated, doctored, and generally fooled around with. I choose to believe the account that makes the most sense. But, please, don't stop on my account <img src="/forums/images/graemlins/smile.gif" alt="" />


Fasteddy's advice is occasionally sound...
Re: The eons old modus operandi [Re: hazy_daze] #909694 01/10/09 03:30 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
Quote
But, please, don't stop on my account


Sorry, but I'm about done with this - the Truthers remind me of what a junior JAG officer once said to someone I knew:

"No matter what you say, the facts remain."

Figure that one out. <img src="/forums/images/graemlins/lol.gif" alt="" />

Frank <img src="/forums/images/graemlins/cheers.gif" alt="" />


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: The eons old modus operandi [Re: FrankR] #909695 01/10/09 03:39 PM
Joined: May 2007
Posts: 4,628
hazy_daze Offline
Roll Me Over
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Quote
"No matter what you say, the facts remain."

Figure that one out. <img src="/forums/images/graemlins/lol.gif" alt="" />


Lots of truth in that statement <img src="/forums/images/graemlins/kewl.gif" alt="" />


Fasteddy's advice is occasionally sound...
Re: The eons old modus operandi [Re: hazy_daze] #909696 01/10/09 04:31 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
Quote
Lots of truth in that statement



Or not - depending on how you view it. <img src="/forums/images/graemlins/wink.gif" alt="" />

That statement was made off-the-record by a JAG officer/prosecutor to my father who was appointed as defense counsel at a soldier's court martial during WWII. It was one of the first examples I heard that showed how twisted words can be made to sound like truth...... and that even a grain of truth can be made to sound like a "fact".

I'm still waiting for an answer to this:

Quote
Rolls Royce made the engines for this plane - they say the single rotor found in the wreckage isn't from them.


--------------------------------------------------------------------------------



Can you show me an official Rolls Royce statement to back that claim?


And this:

Quote
Where is that plane?


Frank <img src="/forums/images/graemlins/cheers.gif" alt="" />


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: The eons old modus operandi [Re: FrankR] #909697 01/10/09 04:35 PM
Joined: May 2007
Posts: 4,628
hazy_daze Offline
Roll Me Over
*****
Quote
Quote
Lots of truth in that statement


Or not - depending on how you view it. <img src="/forums/images/graemlins/wink.gif" alt="" />


Point taken.

Another that I heard once was, "For it to be believable, at the bottom of every lie, there has to be a shred of truth."


Fasteddy's advice is occasionally sound...
Re: The eons old modus operandi [Re: hazy_daze] #909698 01/10/09 04:39 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
Yup - even if the shred of truth isn't accurate - only inexplainable - or not understandable - to the point where it seems like the truth if enough people repeat it. <img src="/forums/images/graemlins/wink.gif" alt="" />

Frank <img src="/forums/images/graemlins/kewl.gif" alt="" />


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: The eons old modus operandi [Re: FrankR] #909699 01/10/09 05:53 PM
Joined: Feb 2005
Posts: 2,649
Grasscat Offline
Roll Me Over
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I found this and thought of Phil. <img src="/forums/images/graemlins/smile.gif" alt="" />

Quote
He who will not reason is a bigot; he who cannot is a fool; and he who dares not is a slave.
- Sir William Drummond


Michael j

TreadLightly! Trainer

Grasscat III, 1994 Gen 2 Five speed, Stock ( for a little while )

GrassCat II, 1998 Gen 2.5 Locked and loaded. Ran off with Hector.

GrassCat I, 1991 Gen 1 Ran off with Justice.
Re: The eons old modus operandi [Re: Grasscat] #909700 01/10/09 06:15 PM
Joined: May 2007
Posts: 4,628
hazy_daze Offline
Roll Me Over
*****
Just gotta stir that pot, huh <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />


Fasteddy's advice is occasionally sound...
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