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Powering over 600 757 aircraft around the world, a 535 powered 757 takes off or lands every 25 seconds
70 per cent of Boeing 757 operators have selected -535 engines
-535 engines have logged over 40 million hours of highly reliable service
In service with more than 80 operators
The world's most reliable large turbofan
19,000 hours average to first shop visit
The -535 is a highly successful member of the RB211 family of three-shaft turbofans. Its first version, the -535C, was launch engine for the Boeing 757 and entered service in 1983.
Originally posted by SMR
Well YOUR link says otherwise! So I guess now you have no trust in YOUR source anymore? Figures
You really should accept the advice given to you by the above member who mentioned that you should re-read the link provided, cause at this juncture in this discussion, you are grabbing at straws...
Originally posted by SMR
There was an article posted in the CH thread and that article stated did it not, that P&W and R-R both said that the part in the wreckage image did NOT come from any engine they built.Did they change their minds?
Originally posted by AdamJ
please note that we still have a second FOIA request active for the other 84 flight 77 recordings. we WILL get those also.
Originally posted by HardToGet
Originally posted by AdamJ
please note that we still have a second FOIA request active for the other 84 flight 77 recordings. we WILL get those also.
Are you positive? How can you be sure you will get them? Keeping my fingers crossed here...
Originally posted by Seekerof
You really should accept the advice given to you by the above member who mentioned that you should re-read the link provided, cause at this juncture in this discussion, you are grabbing at straws...
Originally posted by SMR
There was an article posted in the CH thread and that article stated did it not, that P&W and R-R both said that the part in the wreckage image did NOT come from any engine they built.Did they change their minds?
seekerof
AFP contacted Honeywell’s Aerospace division in Phoenix, Ariz., and sent high-resolution photos for their examination. “There’s no way that’s an APU wheel,” an expert at Honeywell told AFP. The expert, who cannot be named, added: “That turbine disc—there’s no way in the world that came out of an APU.”
Originally posted by HardToGet
No, sorry even with VLC it clearly shows a thinnish cone, divided into three sections by two black lines, and pointed at a downward angle. No airliner, where the nose is much, much thicker.
1) You cannot control a 757 at that speed. Overshoot 100 yards, and Cheney is toast. The horizontal angle of attack is scientifically impossible for a 757.
2) Even when you do hit the right spot with a 757, you cannot be sure 100% what the damage will be, and to what extent
Originally posted by SMR
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)
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.
Lets go over and ask Honeywell shall we !
www.thetruthseeker.co.uk...
AFP contacted Honeywell’s Aerospace division in Phoenix, Ariz., and sent high-resolution photos for their examination. “There’s no way that’s an APU wheel,” an expert at Honeywell told AFP. The expert, who cannot be named, added: “That turbine disc—there’s no way in the world that came out of an APU.”
The Global Hawk, meanwhile, is powered by a single Rolls-Royce AE3007H turbofan. The AE3007 is built by the Allison Engine division of Rolls-Royce located in Indianapolis, Indiana.
Using photos and cut-away drawings of these three engines, we can estimate the diameters of the compressor and turbine rotors just as we did for the RB211. The results of these comparisons are summarized in the following table.
Engine--Overall Diameter--Compressor Hub Diameter--Turbine Hub Diameter
PW J57--40.5 in (102.9 cm)--16 in (40.6 cm)--18 in (45.7 cm)
PW JT8D--49.2 in (125 cm)--21.5 in (54.6 cm)--22.5 in (57.1 cm)
RR AE3007H--43.5 in (110.5 cm)--14 in (35.6 cm)--15 in (38.1 cm)
This analysis indicates that all three of these engines are too small to match the engine component photographed at the Pentagon. Some sites also suggest the part might be from the aircraft's auxiliary power unit (APU). An APU is essentially a small jet engine mounted in the tail of an aircraft that provides additional power, particularly during an emergency. However, APUs tend to be much smaller than jet engines, and the component pictured at the Pentagon is too large to match any found in an APU. It has also been suggested that the attack was conducted by a cruise missile like the Tomahawk or Storm Shadow, but these and other weapons are powered by engines no more than 15 inches (38 m) across. These powerplants are obviously far too small to account for the Pentagon wreckage.
Whatever piece this is, it appears to be only the central hub of a compressor or turbine stage. Normally, each of these rotating stages would be fitted with several curved blades mounted along its circumference. These blades were apparently knocked off the rotor hub found in the wreckage due to the force of the impact. The loss of these blades is unfortunate since different manufacturers often adopt unique shapes for their fan, compressor, and turbine blades that would make the source of the component much easier to identify. Nonetheless, we have been able to locate the following picture of the intermediate pressure compressor section of the RB211 that appears to match several characteristics of the Pentagon debris. Note that this photo appears to be from the RB211-524 which is an uprated relative of the RB211-535 used on the Boeing 747 and 767. This engine model contains seven intermediate pressure compressor stages compared to the six of the RB211-535. However, the compressor disks used on both engines are believed to be nearly identical.
One similarity between the two photos can be seen in the cleats along the edge of the Pentagon object. These devices are called dovetail slots and provide attachment points for the compressor blades. The shapes of these slots on the Pentagon wreckage appear to match those on the RB211 assembly shown on the left. Furthermore, the "nosepiece" jutting out from the center of the disk in the Pentagon photo shares commonalities with the central shaft visible in the RB211 photo.
Based on the above analysis, the closest match to the debris at the Pentagon appears to be a rotor disk from a Rolls-Royce RB211-535. The wreckage is most likely a compressor stage given the shape of the doevetail slots. It is difficult to be certain exactly which compressor disk it is since the six rotors of the intermediate pressure section and six high pressure compressor disks are of similar size. The primary difference from one compressor to the next is the smaller span of the compressor blades as the air flows further into the engine, and these blades are no longer attached to the wreckage. However, we suspect that this rotor disk is probably from the high pressure section or perhaps the very last disk of the intermediate pressure compressors.
For more refuting of SMR, see: "Pentagon & Boeing 757 Engine Investigation"
Originally posted by Seekerof
Based on the above analysis, the closest match to the debris at the Pentagon appears to be a rotor disk from a Rolls-Royce RB211-535. The wreckage is most likely a compressor stage given the shape of the doevetail slots. It is difficult to be certain exactly which compressor disk it is since the six rotors of the intermediate pressure section and six high pressure compressor disks are of similar size. The primary difference from one compressor to the next is the smaller span of the compressor blades as the air flows further into the engine, and these blades are no longer attached to the wreckage. However, we suspect that this rotor disk is probably from the high pressure section or perhaps the very last disk of the intermediate pressure compressors.
For more refuting of SMR, see: "Pentagon & Boeing 757 Engine Investigation"
Note that this photo appears to be from the RB211-524 which is an uprated relative of the RB211-535 used on the Boeing 747 and 767. This engine model contains seven intermediate pressure compressor stages compared to the six of the RB211-535. However, the compressor disks used on both engines are believed to be nearly identical. Note that this photo appears to be from the RB211-524 which is an uprated relative of the RB211-535 used on the Boeing 747 and 767. This engine model contains seven intermediate pressure compressor stages compared to the six of the RB211-535. However, the compressor disks used on both engines are believed to be nearly identical.