Quote Originally Posted by Sledlude
^^ and according to that damn loose change video the engine they "found" in the building wasn't consistent with the plane
Engine Evidence
Let�s take a look at some of the ground debris that appears to be related to an aircraft engine. Many different sites and posts have reported that the 757 uses Rolls-Royce engines [RB211-535E4B] - however it should be noted, for the sake of thuroughness, that American Airlines also use Pratt & Witney engines [PW2037] in many of their 757 fleet. You can also view this information on their website. (The 757 fleets around the world actually use over six different kinds of engines.) The 757 that is reported to have hit the Pentagon was using RB211-535E4B engines.

Here is are photos of some apparent engine parts from the Pentagon crash site.


Image portion cropped from (source) - Another View

What is seen in this photo is most likely the APU (Aux Power Unit) used in a 757 that is equipped with Rolls-Royce RB211 engines. The APU (Honeywell GTCP331-200) is located in the tail section of the aircraft (that's what the large vent that looks like a 3rd jet engine is) as edvidenced on this technical rescue reference aid from Boeing. Boeing 757 reference website. These small turbine engines are quite common on modern turbine & turbofan passenger aircraft, and are used to furnish ground auxillary power while the main engines are shut down during ground operations. An online training aid lets you Play around with the controls on a 757/767 instrument pannel.

There have been some people who claim that a Global Hawk was what hit the Pentagon. Here is what John W. Brown, spokesman for Rolls Royce (Indianapolis), had to say about the part in the photo above �It is not a part from any Rolls Royce engine that I�m familiar with, and certainly not the AE 3007H made here in Indy.� (Of course it wouldn't be anything he's familiar with, it's a powerplant made by Honeywell.) The AE 3007 engines are used in small commuter jets such as the Cessna Citation; the AE 3007H is also used in the military�s unmanned aircraft, the Global Hawk. The Global Hawk is manufactured by Northrop Grumman�s subsidiary Ryan Aeronautical, which it acquired from Teledyne, Inc. in July 1999. A detailed view of what the turbofan that powers the Global Hawk looks like - I'm sure you can see it's too small to be anything in the pictures contained here or anywhere else in the Pentagon crash evidence. Also visible in this photo, one of the 757's blue passenger seats to the left of the turbine, and possibly a 2nd seat above the other seat.


Below is a significant portion of a badly smashed RB211 engine in the Pentagon wreckage - what appears to be the diffusor section of the compressor, one of the pumps remains partially attached, some hoses and the familiar webbed wire wraps (to the right of the main ring) and some of the Boeing yellow primed support structure is lying beside it (left, with rivets - again: note the yellow primer, we'll cover that further down).
Reference: Image of the engine used on the 757 (it's the rightmost one, top row) Rolls-Royce


Another engine part, bottom right.

Below: Evidence of the right engine impact on the side of the building is evident on the large pillar being sprayed with fire retardant. (click photo for huge version)