"One 1\u00BD pdr Davis gun and one Lewis gun above upper wing, and one Lewis gun in the nose"@en . "prop"@en . . "75.0"^^ . . . "Four"@en . "75"^^ . . "18.29 m"@en . "Prototype only"@en . . "68400.0"^^ . "Supermarine Nighthawk"@en . . . . . "962.0"^^ . "1"^^ . "65.0"^^ . "17"^^ . "1917"^^ . "9"^^ . . "6146.0"^^ . "plane"@en . . "Anti-Zeppelin Fighter"@en . "The British Fighter since 1912"@en . . . . "89.2"^^ . "3677.0"^^ . "100.0"^^ . "The P.B.31E Nighthawk, the first project of the Pemberton-Billing operation after it became Supermarine Aviation Works Ltd., was a prototype anti-Zeppelin fighter with a crew of three to five and an intended endurance of 9\u201318 hours. It was first flown in February 1917 with Clifford Prodger at the controls."@en . "The P.B.31E Nighthawk, the first project of the Pemberton-Billing operation after it became Supermarine Aviation Works Ltd., was a prototype anti-Zeppelin fighter with a crew of three to five and an intended endurance of 9\u201318 hours. It was first flown in February 1917 with Clifford Prodger at the controls."@en . . "Anzani"@en . "11.28 m"@en . "2794.0"^^ . "60.0"^^ . "37.0"^^ . . "1671.0"^^ . "5.39 m"@en . "2"^^ . .