Quoting tom355uk (Reply 21): The two main differences are the engine thrust ratings - the 311 has 139kN rated CFM56-5C2's and the 313 has 151kN rated -5C4's, and the -313 has an increased MTOW (257t vs 275t from memory). There is also a rarer -312 version that has a MTOW of 260t. |
A little anecdote for those who are interested: The -311 models are the laughter at
LH and probably the reason why all 744 pilots would never ever want to switch to Airbus. They are a pain in the rear when it comes to climb performance, even more than the other A340s, and often enough they cannot fly specific
SID's for missing the necessary vertical rate requirements.
Not too long ago a teacher of mine who knows what he's talking about told me that an A340-311 hat a GPWS warning while climbing out of a chinese airport at night. The pilots assumed system fault, since they were under positive radar control at all time. The people back in Frankfurt however knew through the
ADS (transmitting relevant aircraft data to the operator automatically) that it was a close call with a mountain ridge that triggered the warning. The pilots had no idea how bad the climb performance of the aircraft
really was.
And funnily enough, just recently
LH sold one of the crappy -311s to the Deutsche Flugbereitschaft. Now Chanceless Merkel is cruising through the world with the underperforming bird.
Still, I love all of the A340s approach to pax noise comfort. Unbeatable until the A380 arrived.
// You know you're an aviation enthusiast if you look at your neighbour's cars and think about fleet commonality.