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 9-18 hours. It was first flown in February 1917 with Clifford Prodger at the controls.
Made by Supermarine.
It is the successor of the Pemberton Billing P.B.29E .