 Through the late 1930s and into the 1940s Summers continued to test numerous aircraft and iron out issues with existing airframes.On 5 March 1936 Jeffrey Quill flew Summers in Vickers' Miles Falcon from Martlesham to Eastleigh Aerodrome, where he was to fly the new F.37/34 fighter, which on arrival had been changed to K5054.Summers (then chief test pilot for Vickers (Aviation) Ltd.) took the prototype K5054 on its first flight from Eastleigh Aerodrome (later Southampton Airport).