PEMBERTON BILLING biplane PB.11 (PB.15)

   Serial No. 1374, which the RNAS acquired in February 1915, was a pusher 'Gun Bus' type with a Gnome engine. This was probably no more than the Farman III, which Billing had purchased in order to learn to fly in twenty-four hours on 17 September 1913, to win a wager with Handley Page, although this machine did not have an enclosed nacelle.