A new lightweight aluminum alloy developed in Japan was used and Horikoski chose to omit armor plate and self-sealing fuel tanks from the design. These protective devices weighed hundred of kilograms and could not be incorporated if Mitsubishi hoped to meet the performance requirements specified by the navy. Yet the lack of these components eventually became the Zero's undoing.
Redneck said:For me it's a toss-up between the P51D and the P38 Lightning.