![aircraft design - How does wing bending relief of an a340 compared to an a330 allow it to carry 30t more fuel in a center section of nearly identical wings? - Aviation aircraft design - How does wing bending relief of an a340 compared to an a330 allow it to carry 30t more fuel in a center section of nearly identical wings? - Aviation](https://i.stack.imgur.com/SEkQy.png)
aircraft design - How does wing bending relief of an a340 compared to an a330 allow it to carry 30t more fuel in a center section of nearly identical wings? - Aviation
![Frankfurt, Germany - April 7, 2020: Lufthansa Airbus A330 and A340 grounded and stored at Frankfurt airport (FRA) in the Germany. Airbus is an aircraf Stock Photo - Alamy Frankfurt, Germany - April 7, 2020: Lufthansa Airbus A330 and A340 grounded and stored at Frankfurt airport (FRA) in the Germany. Airbus is an aircraf Stock Photo - Alamy](https://c8.alamy.com/comp/2BDAJ0A/frankfurt-germany-april-7-2020-lufthansa-airbus-a330-and-a340-grounded-and-stored-at-frankfurt-airport-fra-in-the-germany-airbus-is-an-aircraf-2BDAJ0A.jpg)
Frankfurt, Germany - April 7, 2020: Lufthansa Airbus A330 and A340 grounded and stored at Frankfurt airport (FRA) in the Germany. Airbus is an aircraf Stock Photo - Alamy
With the Airbus A330 and A340 sharing the same fuselage and wingspan why was there the necessity for the 4 engine version at all, weren't they able to find 2 engines with
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