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The Type 99 Mark 2 was carried by later models of the A6M, starting with the A6M3a Reisen Model 22 Ko, [3] and on later Navy fighters such as the Kawanishi N1K-J. The Model 4 of this weapon adopted the same belt-feed mechanism as the Type 99 Mark 1 Model 4. The Type 99 Mark 2 Model 5 resulted from attempts to increase the rate of fire.
The 30 mm Type 5 cannon was a Japanese Navy autocannon used near the end of World War II. It was an indigenous 30 mm design with better performance than the Navy's earlier Oerlikon-derived Type 2 or the Imperial Army's Browning-derived Ho-155 , although it was considerably heavier.
In interviews conducted by the U.S. Naval Technical Mission to Japan after the end of the war, Japanese military personnel said it was the most reliable Japanese anti-aircraft weapon, but second in effectiveness to the 100 mm (3.9 in) Type 98 anti-aircraft gun. [4]
Had the war continued longer the Ho-155-II would most likely have seen service on the jet-powered Karyu Ki-201. The Ho-155-I was first began development in 1942 as a scaled-up and modified version of the 20mm Ho-5 cannon, [1] itself a scaled-up Model 1921 aircraft .50-inch Browning machine gun.
The Ho-5 (Army Type 2) was a Japanese aircraft autocannon used during World War II. Developed from the Ho-103 machine gun, it was a version of the American Model 1921 Browning aircraft machine gun. It replaced the Ho-1 and Ho-3 (Army Type 97) in general service. The Ho-5 was belt-fed using typical Browning-style steel disintegrating links.
The Type 98 20 mm AA machine cannon was the most common light anti-aircraft gun of the Japanese military. [1] The Type 98 designation was given to this gun as it was accepted in the year 2598 of the Japanese calendar (1938). [5] It entered service that same year and first saw combat in Nomonhan. It was used until the end of World War II. [1]
Ho-3 20 mm cannon; Ho-5 20 mm cannon (based on Browning) Ho-155 cannon (aka Ho-105) 30 mm cannon (based on Browning) Ho-155-II 30mm cannon; Ho-203 37 mm cannon; Ho-204 37 mm cannon (based on Browning) Ho-301 40 mm cannon (caseless ammunition, sometimes considered a "rocket launcher") Ho-401 57 mm cannon; Ho-402 57 mm cannon; Type 88 75 mm ...
Introduced in 1942, compared to the earlier Type 98 20 mm AA machine cannon, Type 2 20 mm had higher maximum rate of fire, could be elevated to 95 degrees and had a central fire-control system. [3] The central fire-control system developed for the Type 2 could control and direct six of the guns at once.