The shape is just a result of the engineering decisions to reach Airbus's goal: transport fuselages to Toulouse. Those are relatively light, but big, so buildin

The shape is just a result of the engineering decisions to reach Airbus's goal: transport fuselages to Toulouse. Those are relatively light, but big, so building a tube-like structure above the main "chassis" of the plane yields to this kind of shape, which we then recognize as a similarity to beluga.