If the "blackbox" flight recorder is never damaged during a plane crash, why isn't the whole damn airplane ma

Question

why isn't the whole damn airplane made out of that stuff?

Answer 1

They must get this question all the time at the National Transportation Safety Board. The guy I talked to didn't miss a beat with the answer: because the interstates aren't wide enough. His point, in case you're new to sarcasm, was that a plane built to black box standards would be so heavy you'd have to drive it rather than fly.

Unlike the rest of the aircraft, which is mostly made of light materials such as aluminum and plastic, the cockpit voice recorder and the flight data recorder are encased in stainless steel boxes roughly 10 inches by 10 inches by 5. The steel is maybe a quarter inch thick and the boxes are so heavy in consequence that the designers don't even bother enclosing the accompanying electronics, which in a crash generally meet the same fate as the passengers. As an added precaution, the boxes are lined with a liquid-filled foam bladder encased in plastic that's supposed to protect against the intense heat of a post-crash fire.

Over the years these precautions have proven pretty effective. Investigators got useful data off one recorder that had been immersed in the ocean for seven years. But in another crash in Thailand the recorder landed in a pool of flaming fuel and basically got cooked.

One thing the NTSB learned from experience: be careful where you put these things. Recorders used to be located near the point where the wings joined the fuselage, the theory being that this was the most heavily constructed part of the plane. Problem was, being heavily constructed, the parts of the plane falling on the recorders often crushed them. Now the recorders are put in the tail section so that, assuming your typical crashing plane goes in nose first, the forward part of the airframe absorbs most of the impact.

Sitting back there won't help you, though. When you mix stuff in the Cuisinart, you think it matters which end of the banana went in last

Answer 2

The easy answer is that the 'damn plane' wouldn't fly - it would be too heavy and nearly impossible to move, not to mention much more costly to operate and maintain. Also, the black box is usually self ejecting and detachable from the rest of the plane, which gives it a much higher survivability rate. Besides, modern planes are actually pretty tough, as far as explosives and other forms of damage are concerned - fairly large chunks of a plane can be blown off but as long as the cockpit and flight controls are intact, the plane will usually be landable. The main reason planes go down is usually human error, i.e. bad piloting or poor maintenance, not faulty engineering. Check out http://en.wikipedia.org/wiki/Flight_data_recorder for more info on black boxes.

Answer 3

I think I heard a comedian ask this one time. It's not a bad thought! I'm no engineer, but I guess the material that the black box is made of is very heavy or dense. Therefore, if the whole plane was made of this material, the plane wouldn't be able to fly.

Answer 4

Then the plane would never get off the ground

Answer 5

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