Flight 77, the supposed plane that hit the Pentagon on 9/11 was a Boeing 757. It is the same plane that President Trump flies in.
A Boeing 757 uses one of 2 different engines: Either a Rolls-Royce RB211 or a Pratt & Whitney PW2000
Here is a diagram of a Rolls-Royce RB211. It says the opening of the turbine of a RB211 is 84.8 inches in diameter. (7 feet)
https://ars.els-cdn.com/content/image/3-s2.0-B0122274105003562-gr7.jpg
Here is a photo of President Trumps plane (757), look at the size of the opening of the plane turbine and the person standing next to the plane. Look at the center hub of the turbine, compare its size to the person standing next to the plane.
Here is a photo from the Pentagon on 9/11. Look at the round object behind the person on the left. That is the center hub of a turbine from the object that hit the Pentagon. Notice anything wrong?
I congratulate you on your tenacity and integrity. You have done something that is hard to do. I had no idea that such a big piece remained. Now, everyone here can know.
Perhaps you can appreciate my asperity on this topic, which I do not brag about but find it hard to repress. Where I worked, we built everything from cruise missile to jetliners. It is hard to get this across.
Isn't it amazing how it cut through all that stonework but there isn't even a small dent in the nose?
Or might it have been photoshopped?
That would have been a panel off the side of the fuselage.