Bertie Thruster - not the best example of the whirlwinds performance as, a few seconds after that photo was taken, the helicopter suffered an engine failure and ditched off the back of the boat. It was a demonstration to the press off Thorney Island in 1955 to mark the the re-formation of 22 Sqn in the helicopter role. Fortunately happened as the helicopter was moving back in to pick up a 'volunteer' reporter strapped into a stretcher.