John
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Posts: 1253
Joined: Sat Sep 18, 1999 10:47 am

What Is The Difference Between LR And ER?

Fri Mar 03, 2000 1:37 am

Does the term LR mean "ultra" long range, and ER, just a standard extended range, for example, the 767-200/300ER? Can someone clarify this for me, or have I already answered my own question? Appreciate any replies from the experts, thx.
 
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RE: What Is The Difference Between LR And ER?

Fri Mar 03, 2000 2:55 am

John,
You're talking about the 777-200ER and 777-200LR, right? ER and LR are just two ways of saying the same thing. The original 777s were the 777-200A and 777-200B, when built they became the 777-200 and 777-200ER. When Boeing came to designate the 777X, they could use the 777-300ER because they hadn't already used it, but had to come up with something else for the 777-200X and so they decided to call it the 777-200LR.

Embraer also did this with the ERJ-145, there is the ERJ-145ER and the longer range ERJ-145LR - maybe Boeing copied them ?!?!?!?

Hope that helped
James