There is not much difference between the Airbus A330 and the A340 in terms of structure, systems, and wings. The biggest difference is the engines. The A330 is a dual-engine aircraft, while the A340, its longer sibling, is a quad-engine aircraft. But why did Airbus need to launch two identical aircraft, with the longer one … Continue reading Why Does The Airbus A340 Have 4 Smaller Engines?