BA 772

[adarob]

hey there


as we know that british airways powers its boeing 772 with either rr trent800 or ge90 engines , but i noticed that it serves LHR -singapore - sydney route with its 772 with rr trent800 , in other words never uses 772 with ge90 in this sector , the link below supports what i said , i'd like to know why is that , is it for technical reasons related with engines or what ?? is rr trent800 is more efficient than ge90 for long haul flights or it burns less fuel ???

[wiggy]

never uses 772 with ge90 in this sector ,

The GE engined -200s are certified for a lower takeoff weight than the 200s with the Trent, so your payload would would restricted on the longer sectors, and also BA's GE engined 777-200s don't have any onboard crew rest facilities installed so you'd run into problems with crew duty times on the LHR-SIN and SYD-LHR sectors.

[Mr Levitator]

You are right, but I think the GE engined ones (200LR) have the higher gross weight/range/CRC fitted ;-). Empty the 200LR is a rocket.

[adarob]

dear wiggy

as you said that (BA's GE engined 777-200s don't have any onboard crew rest facilities installed so you'd run into problems with crew duty times on the LHR-SIN and SYD-LHR sectors).


that's a v.good answer , but it seems to me that ge90 & pw4000 engines have the ability to fly for long haul flights , for example : austrian airlines was using ge90 engines on its 772 on Vienna - Kula lumpur - sydney sector , as well as air austral uses its 772 with pw4000 engines in reunion - Sydney route


So do you mean that only BA 772 with ge90 engines is certified for a lower takeoff weight & the payload would restricted on the longer sectors or its for any 772 powered with ge90 ???

[wiggy]

Hi adarob, I was specifically talking about BA's GE engined 200's, and even within that fleet there variances in the certified weights, dependant on wether it's an A market aircraft or an ER but they are always lower Max Take Off weights than the Trent engined -200ERs.

I don't have any information on what limits/weights the other operators you mention are using - maybe one of their Flightcrew will spot this thread and be able to help out.