You are viewing a single comment's thread.

view the rest of the comments →

[–] clamhurt_legbeard 0 points 1 points (+1|-0) ago  (edited ago)

True stuff. A B-25 WWII bomber hit the Empire State Building while lost in the fog, trying to land.

Let's compare the B-25 crash to a potential Boeing 767 crash. I'm going to maximize damage potential as much as reasonable, when not directly contradicted by evidence.


Weight: 30,000 lbs (no bomb load)

Speed: 150-200 mph (approach speed)

Fuel: 600 gal of AVGAS (assuming ferry tanks installed but half capacity after their trip)

Boeing 767-200 (UA 175)

Weight: 300,000 lbs (took off 1 hr before crash)

Speed: 200-500 mph (I'll do calculations with claimed radar speed and a much lower speed)

Fuel: 10,000 gal of JET-A

Let's run the numbers.

To calculate inertia, we can use the formula F = ma

The force equals the mass times its acceleration.


F = 30,000 x 200 = 6,000,000

Boeing 767

F = 300,000 x 200 = 60,000,000

So we see even if the Boeing hit the Twin Towers at half the claimed speed, it would still smash the building with 10x the energy of the B-25 that hit the Empire State Building.

Then the building would have 16x as much fuel soaking everything, and JET-A burns hotter than the B-25's AVGAS.

[–] Shizy 0 points 1 points (+1|-0) ago 

You're awesome! Thanks for breaking it down like that!

[–] clamhurt_legbeard 0 points 1 points (+1|-0) ago 

No problem, and thanks!

[–] Adam_Jensen_ 0 points 0 points (+0|-0) ago  (edited ago)

You are using velocity in your calculations for acceleration.

You should be comparing kinetic energy ke=.5mv^2

[–] clamhurt_legbeard 0 points 0 points (+0|-0) ago 

Do the math your way.

Tell me if the Boeing still has 10x the inertia at the same speed.

[–] Lisa777 3 points -3 points (+0|-3) ago 

It's too late... Get it?