“Surely Mitsubishi has all that stuff somewhere.”
I hope somebody does.
https://www.thoughtco.com/world-war-ii-mitsubishi-a6m-zero-2361071
“The design of the A6M Zero began in May 1937, shortly after the introduction of the Mitsubishi A5M fighter. The Imperial Japanese Army had commissioned Mitsubishi and Nakajima both to build the planes...”
“... For performance, the Imperial Japanese Navy required that the new design be capable of 310 mph at 13,000 ft. and possess an endurance of two hours at normal power and six to eight hours at cruising speed (with drop tanks). As the aircraft was to be carrier-based, its wingspan was limited to 39 ft. (12m). Stunned by the navy’s requirements, Nakajima pulled out of the project, believing that such an aircraft could not be designed. At Mitsubishi, the company’s chief designer, Jiro Horikoshi, began toying with potential designs.”
“... , the new A6M was one of the most modern fighters in the world when it completed testing. “
“Entering service in 1940, the A6M became known as the Zero based on its official designation of Type 0 Carrier Fighter. A quick and nimble aircraft, it was a few inches under 30 feet in length, with a wingspan of 39.5 feet, and a height of 10 feet. Other than its armaments, it held only one crew member, the pilot, who was the sole operator of the 2 × 7.7 mm (0.303 in) Type 97 machine gun. It was outfitted with two 66-lb. and one 132-lb. combat-style bombs, and two fixed 550-lb. Kamikaze-style bombs. It had a range of 1,929 miles, a maximum speed of 331 mph, and could fly as high as 33,000 feet.”