Bell P-39 Airacobra
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The Bell P-39 Airacobra is a fighter produced by Bell Aircraft for the United States Army Air Forces during World War II. It was one of the principal American fighters in service when the United State
P-39Q Saga Boy II of Lt. Col. Edwin S. Chickering, CO 357th Fighter Group, July 1943
Bell XP-39 showing the position of the supercharger air intake
Bell P-39 Airacobra center fuselage detail with maintenance panels open
The weapons bay of the P-39
M4 autocannon
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The 37 mm Automatic Gun, M4, known as the T9 during development, was a 37 mm recoil-operated autocannon designed by Browning Arms Company and entered service in 1942. The M4 and its variants would pri
Bell P-39 Airacobra
…passing beneath the pilot's feet under the cockpit floor. The main purpose of this configuration was to free up space for a 37 mm Browning Arms Company T9 cannon, later produced by Oldsmobile, firing through the center of the propeller hub for optimum accuracy and stability. This happened because H.M…
An M4 gun displayed at the Finnish Air Force Museum, 2012
Restored PT658 on the Columbia River, October 2014. Note: M4 37 mm (1.46 in) automatic cannon mounted on the bow.
M4 at the National Museum of the United States Air Force