WWI Scarff ring airplane machine gun mount.




More: https://en.wikipedia.org/wiki/Scarff_ring

Previously:

WWI improviser anti-aircraft gun from pistols - photo
WWI warship firing salvos - GIF
WWI U.S. Army steam tank - photo
WWI Springfield periscope trench rifle - photo
Machine gun synchronizer - video
WWI pack horse carrying machine gun - photo
Machine gun synchronizer in slow motion - GIF
WWI fake iron trees used as observation posts - photos
Carrier pigeon released from tank in WWI - photo
WW1 US railway gun - photo