On 9/11 an aluminum tubing light pole is said to have pierced the windshied of a taxicab near the Pentagon.
Here are links to two views of the pole after it is said to have been removed from the taxicab:
Here is a description of the pole:
The pole was straight originally. The lamp head is 40 feet off the ground, and the straight main light pole looks to be about 37 feet long, is tapered from 10 inches at the bottom to 6 inches at the top, and is extruded from 1/8 inch thickness aluminum. The original pole weighs 247 pounds, with 20 pounds for the truss arm assembly and 70 pounds for the lamp head added, to give a total weight of 337 pounds for each light pole standing there, before the 180,000 pound (90 ton) aircraft allegedly hit them at 535 mph. (784.8 feet per second (fps))
In the photo, the upper part of the pole is bent in a very smooth radius. Is this the way an unheated aluminum pole would be expected to respond to being violently struck near the top?
It would seem to me, that a strike at 500 mph to a cold aluminum tube might create a crease on the side away from the strike, resulting in an angular deformation. I cannot picture a cold aluminum tube being struck at 500 mph and bending in a beautiful, smooth arc.
