Some Questions
Got a couple tech questions and I hope I can get some clarification.
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?
Also, I was reading how the 777 does not need winglets because their wings are very efficient; however, the article didn't explain what makes the wings more efficient. Someone told me that they use supercritical airfoils, but this didn't make much sense since I didn't think airliners used supercrit wings. The article mentionned something about "triple bogey" wings, but again, it did not explain what triple bogey means.
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?). I have heard conflicting answers on this one.
Anyways, hopefully someone can shed some light here.
Thanks.