Martin Sheen: 9/11 Questions 'Unanswered,' Building 7 'Very Suspicious'

[tomk52]

103. Other reason why there's so little debris...

... is that the upper 2/3rds of a plane (above the passenger deck) is essentially a thin-walled, aluminum balloon, containing mostly air, with an additional low density of chairs & passengers.

The wings, stabilizer & tails are also thin-walled balloons. The inboard portion of the wings contains fuel & air (depending on amount of fuel remaining), while the outboard portion contains mostly air, a few spars & some small actuators.

Below the passenger deck is a different story: densely packed heavy machinery, landing gear, cargo & fuel.

The engines are small (~18&quot diameter, dense cores, with a lightweight large diameter fan in front, and a large diameter, thin-walled aluminum housing enclosing mostly air (along with the core, of course).

This explains what a plane looks like in a collision. The substantial parts are the bottom 1/3rd of the fuselage, the fuel, the engine cores &, to a lesser degree, the passengers & seats. The rest is mostly thin walled aluminum balloons.

This is why the outboard wings & tail didn't penetrate, but were converted into a surprisingly small amount (to airplane construction amateurs) of aluminum confetti.