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AA77 FDR Data, Explained

What I am stating is that the yoke movements captured in the data file do not produce the g forces measured by the sensors.

The body of the aircraft does not respond in a 1:1 relation with the yoke
input as the mass of the plane, air pressure, inertia, etc. must be considered.

When viewing the simulator animation, you can confirm this by viewing the
plane's movement with respect to the yoke input.

What ignorance! That is G Data that beachnut posted.

You would not see G in the animation, silly. You are a total waste of time as you don't understand much about flying.

Tell Balsamo to send someone knowledgeable next time. You are a waste of everyone's time.
 
What ignorance! That is G Data that beachnut posted.

You would not see G in the animation, silly. You are a total waste of time as you don't understand much about flying.

Tell Balsamo to send someone knowledgeable next time. You are a waste of everyone's time.
Well, to be fair, Reheat, the graph doesn't have it's X and Y scales labeled, nor is there a graphic stating "g data vs. time", e.g.

I think Turbo might have thought the data was showing yoke movement, leading to him making the statement you quoted. I was just trying to clear things up.
 
Well, to be fair, Reheat, the graph doesn't have it's X and Y scales labeled, nor is there a graphic stating "g data vs. time", e.g.

I think Turbo might have thought the data was showing yoke movement, leading to him making the statement you quoted. I was just trying to clear things up.
To be fair, they were labeled in an earlier post, which if Turbofan had bothered to take time from posting to research, he would have known--and as a hint, they centered around 1.
Additionally, the paragraph immediately preceeding the graph specifically talked about "g" levels, which would lead a reasonable person to kind of assume that the graph pictured what was being talked about.
Plenty of context there, but troofers can't read with comprehension...
80-odd posts in 3 days. If i'd been near a computer, he'd have reached Ignore status even sooner...
 
Quite simply put without smoke and mirrors: the data received from the sensor is stored in the solid state crash protected memory within 0.5 seconds (worst case). You are confusing bus speed, and polling time with propagation delay.
No, you have not shown the transport lag to be anything in the F-2100, zip data to support your ideas. I may be confused all the time, but I am an engineer and I have done programming with data transport and delays and timing. I worked with teams to study advance cockpit system. I think you are confused thinking your hearsay stuff has merit. You are wrong.


Fine. Then why does the NTSB animation stop before impact? Where is the data between the stop point, and impact point?
The data stopped, easy question for an engineer and an aircraft crash investigator, trained by the USAF years ago. Oops, I have worked with FDR readouts to investigate real aircraft mishaps, have you? The data was not recorded to the secure chip, it may have been in the system. Oops, you never told me if the plane maintains power when you experience 0.2 Gs or less. Seems like the last push over many witnesses saw, could have tripped the Generators off line and stopping data collection on 77. Time to study the busses.


After 500 milliseconds (worst case), that information would not have reached the memory and stored. Confirmed by L3 communications.
Hearsay, please produce the specification spelled out in the F-2100 manuals, and the regulations that may of covered the FDR in 77. Gee, you do not even know what the .5 second means, or when it went into effect. You believe hearsay, you are not using evidence, you are using talk made up by p4t.


Because some of you claim the impact force damaged the crash protected memory. This is a false claim.
Not true, some times the chip is damaged in a crash, and data is missing. You need to study other accidents. There are many examples of data missing, so your claim no data can be missing is not valid for 77, since you have no idea how the system works.


Once again, only 500 milliseconds would be corrupt. How do you explain the missing radar altimeter info in the CSV file? It's in the raw data!
Not true, you have not shown me the data in each 4 second frame makes it to the secure chip in less than .5 second. Gee, this was an early SSFDR, and it may be the reason the rules were changed to only have .5 second delay in transport to the secure chip. The NTSB did not decode the RADALT. Gee, another very easy question. Do you even look at the evidence?


Let me repeat, the rule you state by hearsay testimony third hand of .5 second, may have been enacted by the European agency due to the large delays over time in the older SSFDRs. Well, could this be the case? What do you know? Do you even know the date on ED55? Come on show me your facts, and drop the hearsay junk.

Guess what? You can move the stick until you're blue in the face. The movement of the airplane generates the g force, not the yoke movement!!!
Oops, if I throw the stick forward, you get a lot of negative G. I can rip off the tail! Looks like you want to get technical with an USAF Command Pilot, and an FAA ATP rated pilot flying since I was kid. Push forward, you get lighter, pull back, you get heavier. If you want to talk about what make the G force, I could care less, if I want zero g, I move the yoke forward. If you want to quibble, go ahead, it seems like you are just parroting p4t failed ideas, and non theories, and non conclusions of woo.


The data, and animation shows nothing in the way of extreme alt. Changes to produce such a lag.

What lag?

Once again, the animation stops pre-impact. Where is the data up until the impact point. The FDR still had power!
It stopped. Either there was a power interruption, or there was 3 to 5 second delay in the pipeline which is why ED55 came out to correct the missing data problem with early SSFDRs. Got some facts, or just more hearsay on this issue? BTW, the animation does not have the Pentagon registered right relative to the aircraft flight path, and this was a working copy, never completed or certified for any real use! Sorry.


L3 communications certifies the FDR's. Do you know what it takes to certify a commercial airliner for passenger flight?
Yep! I have an ATP, the same certification as all Captains in the airliners have, and I was trained to fly 300,000 pound class jet aircraft. So? Looks like you love hearsay, and have failed to accumulate any real facts on this issue.


Do you know what checks need to happen before the plane takes off prior to flight? If you knew, you wouldn't have typed your statement.
Yep. I have flown large jets since 1976! What did you do while I was doing my checks all those years.


The NTSB supplied the data. It doesn't support the official story. WHy are you slamming PFT?
p4t are dolts who can't calculate G correctly when told how to. p4t can't even produce a theory or conclusion! They tell you so. The FDR does support what happen on 9/11, you have failed to show it does not! Sorry, but you supplied zero evidence, where as I showed points from the FDR which support witness statements. Oops. 11.2 Gs, is that error still posted?


What year was the FDR installed in 77? As an engineer trained in fabrication of integrated circuits (like computer chips), you are starting to post things that were not available to install in a plane when 77 first flew. You need to back up and use the technology of the day, and stop using hearsay so freely. (and you are right, my years as a pilot, and the same as being an engineer with broad experience, does not count for anything; but your lack of facts and knowledge does)
 
Well, to be fair, Reheat, the graph doesn't have it's X and Y scales labeled, nor is there a graphic stating "g data vs. time", e.g.

I think Turbo might have thought the data was showing yoke movement, leading to him making the statement you quoted. I was just trying to clear things up.

Well, beachnut was pretty specific in what the graph was about. However, other statements by turbo indicates that he doesn't understand anyway.

G is not necessarily movement of the aircraft that is detectable from the exterior, it is acceleration.

For example, let's look at an example of the Thunderbirds or Blue Angles aerobatic teams. The aircraft flying the wing or slot position are moving all over the place by several feet, consequently producing G somewhat similar to a PIO, but it appears they are "rock solid" in position.

But, I do believe there is a parameter that shows yoke input, so the confusion is noted.
 
To be fair, they were labeled in an earlier post, which if Turbofan had bothered to take time from posting to research, he would have known--and as a hint, they centered around 1.
Additionally, the paragraph immediately preceeding the graph specifically talked about "g" levels, which would lead a reasonable person to kind of assume that the graph pictured what was being talked about.
Plenty of context there, but troofers can't read with comprehension...
80-odd posts in 3 days. If i'd been near a computer, he'd have reached Ignore status even sooner...
Well, there was plenty of context for me. Wasn't aware of the graph being posted previously though.

Honestly, I thought his statement regarding yoke inputs, etc. was silliy, but I wanted to find out whether he misunderstood something. Otherwise, I figued it was Stundie Award material.
 
Well, to be fair, Reheat, the graph doesn't have it's X and Y scales labeled, nor is there a graphic stating "g data vs. time", e.g.

I think Turbo might have thought the data was showing yoke movement, leading to him making the statement you quoted. I was just trying to clear things up.
It was G vs time, but the time is each sample in the FDR, there are 8 samples per second.

I would post the yoke movement, but I am tried of wasting time do the work 9/11 truth can't. The last recorded yoke movement was greater in value (nose down) than all previous excisions, thus the largest G below 1, was coming up, possibly below zero g, making your lost pencils fly! I have not found yet, what happens to the generators at .2 g in 77, but in some jets, a g of 0.2, will trip power (once again, the exact mechanism is more complicated, but for a pilots, he looses his generators! The pilot must do something!).
 
Wow, I see some of you are very quick to jump on me and assume everything.

Mr. Skinny asked the following question:


It's not showing stick movement directly, but beachnut is rightly assuming, I believe, that the g forces shown are indicative of Pilot Induced Oscillation (PIO).

My answer was clearing up what I thought was a graph showing lag in
yoke input to g forces (due to PIO).

With that said, no I didn't take time to fully understand his question, so
now is my time to clarify.

The time to record g's from the instant they are measured to the instant
they are stored in crash protected memory is a MAXIMUM of 500 milliseconds.

THis is true for any parameter written!

The speed of the plane, or g force acting on the plane has NOTHING to do
with the write speed of the FDR, bus speed of the system, or serial data
transfer.
 
No, you have not shown the transport lag to be anything in the F-2100, zip data to support your ideas. I may be confused all the time, but I am an engineer and I have done programming with data transport and delays and timing. I worked with teams to study advance cockpit system. I think you are confused thinking your hearsay stuff has merit. You are wrong.


Are you saying it takes a signal from any sensor more than 500 milliseconds
to propagate donw a wire and into the FDR memory?

Do you have any idea about the speed of electron current flow in a wire?

Would you like me to video tape and post an experiment using an oscilloscope,
my scanner, and engine computer to illustrate the amount of time it takes
for cell data to update?


Oops, I have worked with FDR readouts to investigate real aircraft mishaps, have you? The data was not recorded to the secure chip, it may have been in the system.

No sir, I have not , but I have worked with military equipment and advanced
electronic equipment (aside from vehicle PCM scanners). Unless the FDR
lost power while said parameter was written, the information would have
been stored within the certified upper limit of 0.500 seconds! This is
stated directly on the L3 FDR spec.

Ed Santana has already confirmed this in an interview with PFT.

Oops, you never told me if the plane maintains power when you experience 0.2 Gs or less.

I doubt it would, but let me find out for you.

Seems like the last push over many witnesses saw, could have tripped the Generators off line and stopping data collection on 77. Time to study the busses.

Seems like? Well, what sort of g's are experienced when a plane experiences
a dive condition toward earth? Does that shut off power to the bus?
Hmmm...I don't think so!


Hearsay, please produce the specification spelled out in the F-2100 manuals, and the regulations that may of covered the FDR in 77. Gee, you do not even know what the .5 second means, or when it went into effect. You believe hearsay, you are not using evidence, you are using talk made up by p4t.

No I'm not. Go read the spec on the L3 site. They made the FDR's and
the data specs are available on the site. 0.5 seconds once again has
been confirmed by L3 Communications as the absoulte maximum time
for sensor info to store in SS memory.

Not true, some times the chip is damaged in a crash, and data is missing. You need to study other accidents. There are many examples of data missing, so your claim no data can be missing is not valid for 77, since you have no idea how the system works.

Incorrect. You have no idea how the system works! Show me ONE example
of an FDR which lost memory while the bus had power!

Then show me one example of an FDR that lost one parameter when the
impact was within 5% of 3400 g's!

Has anyone calculated the impact force of flight 77, worst case sceanrio
yet? Care to guess what the g force would have been?


Not true, you have not shown me the data in each 4 second frame makes it to the secure chip in less than .5 second. Gee, this was an early SSFDR, and it may be the reason the rules were changed to only have .5 second delay in transport to the secure chip. The NTSB did not decode the RADALT. Gee, another very easy question. Do you even look at the evidence?

If you read the spec on L3 will you believe it? It has been in effect prior to
2001 to certify a commerical airliner!

NTSB did not decode the RADALT, but SOMEONE removed it from the CSV file!!!
Why does it appear in raw data form, but not in CSV format? Hmmmm...

Let me repeat, the rule you state by hearsay testimony third hand of .5 second, may have been enacted by the European agency due to the large delays over time in the older SSFDRs. Well, could this be the case? What do you know? Do you even know the date on ED55? Come on show me your facts, and drop the hearsay junk. [/FONT]

Let me repeat. Take 5 minutes and research L3 products :rolleyes:

It stopped. Either there was a power interruption, or there was 3 to 5 second delay in the pipeline which is why ED55 came out to correct the missing data problem with early SSFDRs. Got some facts, or just more hearsay on this issue? BTW, the animation does not have the Pentagon registered right relative to the aircraft flight path, and this was a working copy, never completed or certified for any real use! Sorry.

3 to 5 seconds! Are you nuts?

My car 's slow computer can detect a change, update the PCM, send the
info a length of the harness, through the DLC, through the connection
hardware, through my laptop's bus, and display it on a monitor as quick
as my screen can refresh, and you're telling me the system on a 757-200
is SLOWER? Te info can't go from sensor to SS memory in the same time,
or less? LMAO!

Get real. This guy has no clue about data transfer rates and FDR tech.
 
12 pages of the same tripe that has been discussed in the OTHER threads on this subject. can you guys just point to those threads; TF is just another mouthpiece for banned members.
 
There are examples of lost data in other accidents investigated by the NTSB. The FDR not having the final seconds is not new, and the FDR in 77 has not been shown to comply with ED55, or the need to comply with ED55. And in addition, it has not been presented, besides hearsay!, that ED55 means what the newest non conclusion expert 9/11 truther p4t mouthpiece is saying.

Present the manuals stating what you claim and ED55 with dates of installation of 77's FDR instead of hearsay twisted by p4t to make up their non theories on 9/11. As of yet, p4t have not made a conclusion, or theory about 9/11, they just make up implied ideas that are complete false, like their complete lack of math and physics expertise clearly demonstrated at their web site.

How do you explain to turbofan he is using hearsay and it has not been backed up by facts as of today!?
 
Hearsay? Is that what you call simply making uneducated assumptions about how something works when you have no understanding of it? I could call that BSing, but I guess hearsay is good enough.
 
I knew it.

90% chance if an old thread is unburied, a truther is at the root.

TAM:)
 
Ed Santana has already confirmed this in an interview with PFT.
No Ed did not present any evidence, he just said it without p4t backing it up with manuals, and ED55. Please produce the manuals saying so, and ED55, and stop using hearsay, it is not proof of anything but you parrot p4t drive by phone calls. This is what hearsay is! Do you understand?


Seems like? Well, what sort of g's are experienced when a plane experiencesa dive condition toward earth? Does that shut off power to the bus? Hmmm...I don't think so!
I already told you once, some planes will loose electrical power from the engine driven generators when exposed to G forces less than 0.2 G, or negative Gs. I have flown jets which have generators that trip off line with subjected to low G force! It happens in real life. You think wrong!


Yes, some jet aircraft loose generator power in low G environments, what you might experience in a thunderstorm.

Incorrect. You have no idea how the system works! Show me ONE example of an FDR which lost memory while the bus had power!
Go look them up, the NTSB has them, and if you try you too can find them and stop thinking p4t non conclusion, non theory stuff is true. How are non theories considered? Do you know p4t make no conclusions or theories? What a bunch of no fact charlatans, selling nothing but false information for 15 bucks a DVD. Who are those without knowledge who fall for the non theories of 9/11 truth and p4t?


Then show me one example of an FDR that lost one parameter when the impact was within 5% of 3400 g's!
Gee, there are examples where the data stopped and there was no real physical upset as you are trying to allude to. What are you getting at? If the data is correct in 77, the last seconds are missing! No impact was needed. It is unknown. (examples can be found where data is missing; the specification of data storage required by ED55 is evidence that early SSFDRs did not store data within 0.5 seconds. Glad mom made me go to engineering school, and I wanted to fly jets.


Has anyone calculated the impact force of flight 77, worst case sceanrio yet? Care to guess what the g force would have been?
p4t can do that for you, they are experts at pulling numbers out their pack of pilots who can't hit buildings in the safety of a simulator, why not make up some more false G numbers. 77 was going over 700 feet per second, how fast did it come to rest? Different items came to rest at different times. Why not tell us the G force, which has nothing to do with the data missing on 77. You can study physics and calculate it.


If you read the spec on L3 will you believe it? It has been in effect prior to 2001 to certify a commerical airliner!
Wrong, 77 flew first in 1991, the specs you state were not in effect for all FDR installed before 2001; you need to read the FARs and FAA rules and present them. You are using present day junk for a 6 year old event and a plane first flown in 1991. You are using data that is 16 years new to lecture others on 9/11, and event you present hearsay and expect it to come true.


NTSB did not decode the RADALT, but SOMEONE removed it from the CSV file!!! Why does it appear in raw data form, but not in CSV format? Hmmmm...
No, the NTSB did not decode the RADALT. So? Read what the NTSB tells you. They list the data they decoded. They list the data they did not decode. Wowzer.

You make up false ideas of doubt, when the NTSB tells you up front, they did not decode the data you are trying to make up some CT out of. This is really bad since you can look this up if you take the time. You say look up stuff you have never found personally, I tell you to look up stuff, even someone you call NUTS has found today again for the nth time.

The NTSB tells you in clear text, they DID NOT decode the radio altimeter! Why not research the non conclusions you seem to making up in your mind with partial or false data!

The NTSB did not decode the radio altimeter (aka RADALT). Repeated for learning the learning impaired, mainly me!

Let me repeat. Take 5 minutes and research L3 products
Oh, they have the model FDR information right this second, a part installed over 10 years ago? What spec was Ed, the salesman talking about? The salesman hearsay expert testimony. If only you had some real evidence to support your ideas. You got the word of a salesman, that is super; a salesman, and Rob! Super duper…


3 to 5 seconds! Are you nuts?
My car 's slow computer can detect a change, update the PCM, send the
info a length of the harness, through the DLC, through the connection
hardware, through my laptop's bus, and display it on a monitor as quick
as my screen can refresh, and you're telling me the system on a 757-200
is SLOWER? Te info can't go from sensor to SS memory in the same time,
or less? LMAO!

Get real. This guy has no clue about data transfer rates and FDR tech.
Based on the data I see on the FDR, there are seconds missing. But I could be wrong, I have only been flying for 35 years. The data rate is clearly stated to the chip, it is 3072 bits per second. The data passed in a second is the amount of data collected in a second on the FDR used on flight 77. I doubt your car can withstand 3400 Gs and maintain 550 knots true airspeed. Your car has nothing to do with an aircraft, and your comparing your car or truck to a plane built and flying in 1991, and you are telling me the specs of a airworthy chip are like the junk in our cars today? What was the speed of a flash memory in 1991? And before you answer, what was the speed of the flash memory in the FDR installed in the plane which flew first in 1991. Do you understand lead times! Freezing the design so you can sell it? I see you clearly stated the exact time your car passes data! It was as fast as my screen updates. Wowzer. Is that engineering terms for what? As fast as… ?

Based on the input in the yoke, and the elevator position, the largest change compared to previous excursions of G, are in the last two seconds of data decoded by the NTSB. The p4t only decode up to the last recorded second. This stick inputs and elevator position CHANGE, point to the witnesses saying the plane pitched down. This would lead to the minimum G. What do you think? On your own without the hearsay experts of p4t.

I hope I am nuts, if it means able to see liars on 9/11 topics! NUTS; that is my favorite statement; ask my dad why…
 
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<snip Great Red Herring for sake of Captain Ahab>

If your $1500.00 car computer can do all of this, you can rest assured a much more elaborate and expensive jet data acquisition system will outperform
this many times over.

Not necessarily. Because of the expense of certification, and the small quantities involved, avionics quite often lag several generations behind the state of the art. Unless and until a particular feature is mandated by regulation, or saves the operator money, it isn't likely to be implemented.
 
Not necessarily. Because of the expense of certification, and the small quantities involved, avionics quite often lag several generations behind the state of the art. Unless and until a particular feature is mandated by regulation, or saves the operator money, it isn't likely to be implemented.


This debate is useless because:

1. If I point you to a developer site with specs., you wont go and read them.

2. My sources are professionals, yet anyone I mention is considered a crackpot,
or not experienced enough....however the people calling these guys crackpots
are no where near the level of ability of said individuals.

3. Many of you believe bus speeds on aircraft are between 2-6 seconds
before data is stored! I have computers from the 70's that are more advanced! :rolleyes:

4. Many of you don't understand what it takes to certify an aircraft,
yet you post information as if it were fact! It's not the age of the plane
that determines the spec/certification. If the law changes, the equipment
must meet/exceed the standard for that year.

5. Many of you don't understand how the FDR records data , even though
I posted a basic relationship to a car's computer to draw a parallel.

keep on believing what you want, and that FDR's have snail paced data
storage from the stone age. Whoever is feeding this garbage to you
is not helping out.

For your sake, take a course in computer technology, or electricity.
 
I guess, but aren't you learning about the computer systems and electrical
properties in avionics? Maybe you're right though...it would pertain specifically
to airline industry tech.

Sure, the NTSB didn't decode the RADAR ALT., but why is it missing from
the CSV file if everything else was included?

GET A CLUE PEOPLE

The raw file contained the parameter, so it shuold have been extracted with
everything else.
 
I guess, but aren't you learning about the computer systems and electrical
properties in avionics? Maybe you're right though...it would pertain specifically
to airline industry tech.

Sure, the NTSB didn't decode the RADAR ALT., but why is it missing from
the CSV file if everything else was included?

GET A CLUE PEOPLE

The raw file contained the parameter, so it shuold have been extracted with
everything else.

Are you truly interested in trying to find the truth? Comments like these seem to suggest otherwise.
 

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