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
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
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.
Supermarine Nighthawk
…occurring at low speeds whilst a Zeppelin was being hunted. It had a trainable nose-mounted searchlight to detect enemy aircraft. A 1½-pounder (37 mm) Davis gun was mounted above the top wing with 20 shells and it carried two .303 in (7.7 mm) Lewis guns. Power for the searchlight was provided by an independent…
Davis gun mounted on Curtiss F5L anti-submarine seaplane