Screen Shot 2016-05-14 at 13.05.59 Published on May 14, 2016 in 15 May 1941Full resolution (1158 × 692) ← Previous Next → Gerry Sayer’s knee board notations from the Gloster E.28/39 first flight, 15 May 1941. (Hartley Moyes, courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)