WWII P-51 Mustang machine gun test bench.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...g_fullsize.jpg
Previously:
1942 wooden P-51 Mustang airplane wheels - photo
Rheinmetall BK-5 autocannon - photos
Northrop F-5E cannon - photo
WWII warplane identification guide - photo
Machine gun synchronizer in slow motion - GIF
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