Flywithjohn From United States of America, joined Feb 2006, 122 posts, RR: 0 Posted (9 years 4 months 2 days 1 hour ago) and read 5043 times:
What are the maine differences between the A330 and A340 other then the 2 engine 4 engine systems but like the range speed and why airbus made seperate planes and wouldn't 2 engines be cheaper to run vs 4?
RichardPrice From , joined Dec 1969, posts, RR:
Reply 2, posted (9 years 4 months 2 days ago) and read 4961 times:
It depends on what version of the A340.
The A340-500/600 has a new wing, while the -200/300 shares the wing structure with the A330-200/300 - the internal structure (brackets, strengthening for the pylons) is all there for both aircraft, justs the equipment (pumps etc) for the outboard engines arent installed on the A330.
Airbus made the A340 with 4 engines because ETOPS 180 was in its infancy when the A340 was designed - you had to have 3 or 4 engines to do long distance out of range of an airport.