The Northrop P-61 Black Widow had a gun mounted that was designed by whom?
Northrop P-61 Black Widow The Northrop P-61 Black Widow, named for the American spider, was the first operational U.S. warplane designed as a night fighter, and the first aircraft designed to use radar. The P-61 had a crew of three: pilot, gunner, and radar operator. It was armed with four 20 mm (.79 in) Hispano M2 forward-firing cannons mounted in the lower fuselage, and four .50 in (12.7 mm) M2 Browning machine guns mounted in a remote-controlled dorsal gun turret.
Shpitalny Sh-37 The Shpitalny Sh-37 (Russian: Шпитальный - Ш-37 ) was the first indigenous Soviet 37 mm aircraft cannon, designed by Boris Shpitalniy at OKB-15. The gun saw limited production and was installed in few aircraft before being replaced by the competing Nudelman-Suranov NS-37 designed at OKB-16. It was installed on a military-trial basis on two short series of aircraft. Installed to fire through the hollow, gear-driven propeller shaft and fastened to the engine block of the Yak-7-37 it was known as MPSh-37, where "MP" stands for "motornaya pushka", similar to the German "Motorkanone" term for the same mount type. As installed in the underwing gun pods of the Il-2 it was known as ShFK-37 (Russian: ШФК-37 - Шпитальный фюзеляжно-крыльевая калибра 37 мм ).