Davis gun
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The Davis gun was the first true recoilless gun developed and taken into service. It was developed by Commander Cleland Davis of the United States Navy in 1910, just prior to World War I.
Davis gun mounted on Curtiss F5L anti-submarine seaplane
Supermarine Nighthawk
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The Supermarine Nighthawk or P.B.31E was a First World War British aircraft, designed by Noel Pemberton Billing and built at Woolston, Southampton after Pemberton Billing's company became Supermarine
Davis gun
…Short 310-B seaplane Pemberton-Billing PB.29E Pemberton-Billing PB.31E - long endurance anti-Zeppelin night fighter with 37mm Davis gun, prototypes only…
Supermarine P.B.31E Nighthawk
The Pemberton Billing PB-29 at NRAS Chingford in 1916
The P.B.31E at the Supermarine works at Woolston, Southampton. R.J. Mitchell, who was to succeed as the company's chief designer, is standing fourth from the left.
The Nighthawk propeller at Solent Sky