reply to post by W3RLIED2
I believe the debris was dug out of the ground. VERY soft ground.
Impact speed, and resultant energies involved, no other regualar aviation accidents compare.
The CVR and DFDR were/are designed to sustain G-forces of....say, 100 G's (I can go look it up). Since they are mounted in the rear of the fuselage,
the intention, based on previous studies of other airliner accidents is, the best survive in that location.
ALSO, the Recorders do NOT have independent power supplies. They are powered by Main Bus #1
If the Left engine quits, then that generator no longer supplies the Main Bus #1. There are relays that automatically sense a loss of bus voltage,
and will allow the shift of power form the other side (In this case, the right to the left). UNLESS there is a FAULT detected (that would best be
described as a short on the bus). Then, the Bus is isolated.
More info, you may or may not care to know, since it is fairly technical, but it is also the truth.
From the NTSB (limited) readouts I have from UAL93....they only refer to Navigation Radio tuning and A/P and Flight Director/MCP inputs and modes, the
DFDR was operating until impact. This tells me that both engines were operating until impact. There were no electrical bus failures, no
interruptions of power. These would have been recorded, on the DFDR.
SO.....I have challenged the OP to provide proof of HIS claims that the CVR and DFDR recordings could have been 'faked'. NO response, as of yet.
AS I have said....I will fence-sit, I just don't want nonsense to cloud the facts.
If it means I have to get technical, about how the airplanes ACTUALLY work, then I will.
Is it possible UAL93 was shot-down?? Yes, it's possible, but again, we have the CVR and the DFDR to refute that idea. Could they be faked??? And
not be found out??? You'd have to research the manufacturer's websites....Sundstrand.
The CVR uses a basic audio cassette tape, much like the one you had in your car in High School, assuming you're as old as I am....remember the
The DFDR is, though, far more sophisticated. DIGITAL!!!! ones and zeroes.....tied into many, many components that provide data......
control surface positions....heading, altitude, speed, V/S, acceleration....temperature....rudder pedal position, control wheel position.....Geez!!!
I could go on, there are hundreds of parameters recorded!!!!! It's DIGITAL, folks!!
So....yeah.....let's try to fake all of this, using ones and zeroes. Anyone who can do that, should start their own computer company!!!!! Maybe it
was Bill Gates!!!! (joke)