Ho-155 Cannon
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The 30 mm Ho-155 cannon was a Japanese aircraft
autocannon An autocannon, automatic cannon or machine cannon is a automatic firearm, fully automatic gun that is capable of rapid-firing large-caliber ( or more) armour-piercing, explosive or incendiary ammunition, incendiary shell (projectile), shells, ...
used during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, often mistakenly called with the Ho-105 or Ho-151. A lighter and more compact Ho-155-II was designed towards the end of the war.


Development

The Ho-155-I was first began development in 1942 as a scaled-up and modified version of the 20mm
Ho-5 cannon 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) ...
, itself a scaled-up Model 1921 aircraft .50-inch
Browning machine gun Browning machine guns are a family of machine gun designs by John Browning, a prolific weapon designer. These include: *M1895 Colt–Browning machine gun, based on a design dating to 1889, was the first successful gas-operated machine gun to ente ...
. In 1943-44 began development of the Ho-155-I and in late 1944 began the development and production of the Ho-155-II for fit into tighter wing bays of fighter planes such as the Ki-84-Ic, Ki-102 and on the project design of the jet-powered Ki-201.


Unknown service

Simultaneously the Ho-155-I and Ho-155-II were produced in
Nagoya is the largest city in the Chūbu region of Japan. It is the list of cities in Japan, fourth-most populous city in Japan, with a population of 2.3million in 2020, and the principal city of the Chūkyō metropolitan area, which is the List of ...
by the Nagoya Army Arsenal, but as the war was prolonged leading to shortages of materials it is not known how many were eventually produced or how many actually saw service. However it became an example of ingenuity and design from the simple basic design of the Browning machine gun.


References


External links

* Gustin Emmanuel
The WWII Fighter Gun Debate: Gun Tables
(1999) * Anthony G. Williams

{{DEFAULTSORT:Ho-155 cannon 30 mm artillery Autocannon Aircraft guns World War II weapons of Japan