Have any of these been found and investigated? They ALWAYS find the black box. It is key to any investigation!!
2007-01-07 13:01:48 · 9 answers · asked by Sabin 1 in Politics & Government ➔ Other - Politics & Government
If they did, they're denying it.
2007-01-07 13:07:01 · answer #1 · answered by Anonymous · 1⤊ 1⤋
Here are the specifications of these devices including what they can withstand:
FLIGHT DATA RECORDER
Time recorded: 25 hour continuous
Number of parameters: 5 - 300+
Impact tolerance: 3400Gs /6.5ms
Fire resistance: 1100 degC/30 min
Water pressure resistance: submerged 20,000 ft
Underwater locator beacon: 37.5 KHz
Battery: 6yr shelf life 30 day operation
COCKPIT VOICE RECORDER
Time recorded: 30 min continuous, 2 hours for solid state digital units
Number of channels: 4
Impact tolerance: 3400 Gs /6.5ms
Fire resistance: 1100 deg C /30 min
Water pressure resistance: submerged 20,000 ft
Underwater locator beacon: 37.5 KHz
Battery: 6yr shelf life 30 day operation
These specifications indicate equipment which can survive just about any conditions and any crash. Indeed, Black Boxes have been recovered from crashes in swamps, mountains, and oceans.
ABC News reports:
"Although investigators look for an entire black box, sometimes the only parts of the device that survive are the recorder's crash-survivable memory units (CSMU). the csmu is almost indestructible. It is housed within a stainless-steel shell that contains titanium or aluminum and a high-temperature insulation of dry silica material." "It is designed to withstand heat of up to 2,000 degrees fahrenheit for one hour, salt water for at least 30 days, immersion in a variety of liquids such as jet fuel and lubricants, and an impact of 3,400 G's. By comparison, astronauts are typically exposed to up to six Gs during a shuttle takeoff." [ABCNews]
So the Black Box is designed to withstand an impact of 3,400 G's. So what about the Pennsylvania crash site?
"The voice recorder was said to be heavily damaged, and the manufacturer was being asked to help with further analysis. The plane that crashed in Pennsylvania was reported to have hit the ground in excess of 500 miles per hour." [ABCNews]
The plane hit the ground at 500 mph. Taking the weight of the plane, its speed of descent, the G's end up much, much lower than 3,400.
Since each plane has two separate Black Boxes which are designed to be indestructible in the event of a tragedy, that makes a total of eight black boxes. We are to believe that all the Black Boxes were damaged beyond use, while a measly paper passport survived! ....I think somebody "lost" them. (Tell us another one Bush)
http://www.themedianews.com/DAGGER/Front%20Page/9-11_black_boxes_.htm
2007-01-07 21:28:22 · answer #2 · answered by Deb 5 · 2⤊ 1⤋
The ones from the Pentigon and PA were found for sure. I'm not sure about the WTC, but in that case not finding them would be no supprise. And you are incorrect, they don't "ALWAYS" find the black box.
2007-01-07 21:35:22 · answer #3 · answered by lordkelvin 7 · 0⤊ 1⤋
Gone via our government, along with the answers to many questions about 9/11. Doesn't matter, Bush will get away with it yet again.
2007-01-07 21:11:23 · answer #4 · answered by alessa_sunderland 5 · 4⤊ 1⤋
Just one of 10,000 questions about 9-11 that can't be explained by the official story.
2007-01-07 21:09:19 · answer #5 · answered by bettysdad 5 · 3⤊ 2⤋
Never in the History of aviation have they been burned up. They are made to withstand all fires. Only on Sept. 11th. did we lose them.
2007-01-07 21:07:58 · answer #6 · answered by jl_jack09 6 · 4⤊ 1⤋
Disintegrated. Vaporized.
2007-01-07 21:04:58 · answer #7 · answered by sparbles 5 · 0⤊ 4⤋
On inside jobs, no inside information is given out! Got it?
2007-01-07 21:18:31 · answer #8 · answered by Nikolas S 6 · 3⤊ 2⤋
Didn't you hear ...................Nixon took them , gave them to Amelia Earhart to deliver to Elvis and she got lost............
2007-01-07 21:06:15 · answer #9 · answered by Akkita 6 · 2⤊ 3⤋