Originally Posted by
BER Flyer
Thats correct. ER ( extended range ) is the improved base model with a longer range. The LR ( long range ) version has an additional fuel tank installed and hence an bigger MTOW.
Yeah, the 777-200LR is often (always?) found on DL's longest routes, ATL-JNB and LAX-SYD. A 777-200ER
can do LAX-SYD (United uses one for that route), but I think the -ER will have to take a weight penalty (ie have to leave some seats empty and/or limit the cargo) more often, depending on the headwinds. Given the hot/high airfield at JNB, I'm not sure a 777-200ER can reliably do JNB-ATL at all (at least not without a fuel stop).