 In preparation for the Dambusters Raid in May 1943, Summers was test pilot for the experimental bouncing bomb dropped from a Vickers Wellington near Portland, Dorset, a job given to him by close friend Barnes Wallis.He was depicted by Patrick Barr in the film made of the events.Summer's flew Britain's first postwar airliner the Vickers VC.1 Viking, adapted from the Wellington bomber, on 22 June 1945.