Someone posted this one in the fragrant harbour forum and I figured I'd try it out here. The RR engines on CX 744 are RB211-524G/H-T. What exactly does each identifier represent (i.e. what does RB mean? 211? 524? G/H? T?). In relation to this, the 340 engines had a desginator CFM... does anyone know what this represents too?
RB means Rover Barnoldswick
211 is the RR engine number
524 is the model number
G/H is the model revision (G and H are physically identical)
-T means the engine has been subject to the optional upgrade to fit the Trent HP system in place of the original to provide superior performance retention.
All RR engines have an RBXXX engine number. they may not be known generally by that designation, but they will have one.
CFM is a company owned by GE and Snecma. The name 'CFM' doesn't mean anything.
Finally, the question about EPR vs thrust (if 1.8 EPR gives XXX lbs of thrust when the engine is new, will 1.8 EPR still give the same XXX lbs of thrust 10 years from today?).
Yes.
When the engine is in service, its performance will degrade and you have to run it hotter and faster to maintain the desired output. This continues until you run out of temperature margin and the engine will need to be overhauled.