I've been studying the page
http://pilotsfor911truth.org/pentagon.html regarding the pentagon crash, specifically I have studied their analysis of the commission report so far:
One error on their part: They correctly calculate that the
groundspeed for the plane 77 was 396 knots, but then claim that the 9/11 commission report is inaccurate because it contradicts the reported
airspeed of 325 knots, which is false as airspeed and groundspeed can and almost always are different for aircraft, especially at high altitudes. So they fail to differentiate between ground- and airspeed.
The next error they make is basing a whole maneuver off of this error, and thus wrongly analyses how much skill would be required to make the turn.
The next error they make is also because of this wrong assumption - they assume the plane would only have accelerated about 30 knots from the end of the dive, to the impact at pentagon, implying that it should have accelerated to a higher velocity. I calculated that the average velocity of the plane, in groundspeed, would be about 417 knots. Near the ground, airspeed and groundspeed would start to match up. So at impact, ground- and airspeed should be comparable with each other at 460 knots. Before the descent, we know that groundspeed was higher than airspeed. Which means that the average airspeed should have been lower than 417 knots, so I'd guess that the plane might have accelerated by a total of 50-80 knots during the 30 seconds before impact, not only 30, at full engine power. Which would mean that the acceleration from the dive would range from 55-85 knots, not the 30 knots that the website assumes. This seems far more plausible, and I think they would agree. It also means that flaps was probably not used during the maneuver, at last not for the final straight.
Then they make some claims about the skill of the alleged pilot and back it up with... "This also can be verified via google searches." <- That's a big no, they should be citing proper reliable sources.
They do say that the maneuver is possible, but they don't think the alleged pilot could have done it. If they realised the mistake they did, they'd probably realise it's a bit more likely than they think.
I don't know about the aerodynaimcs of the boeing 757, but the impact velocity was pretty high. That close to the ground, I think that some of the stability to the plane can be attributed to compression. Ailerons tend have a decreased effect as a plane passes half of the speed of sound, but planes should be designed to self-stabilise. The thing that the pilot had to worry more about was the elevator, which might also be slightly less effective and thus harder to effect the plane majorly, keeping it going more straight. So even if the pilot was nervous and shaky as the plane got close to the ground, it would be hard (well, harder than usual) to pull of any sharp maneuvers.