That takes me back. I flew in one of those when I was serving in Cyprus in 1965. It was only a 15 minute experience flight for those of us who had never flown in a helicopter before. It frightened the living daylights out of me, especially after the pilot told us they had a habit of cracking a pivot bolt that altered the aspect of the rotor blades. Add to that the bubble cabin had to have a horizontal yellow line painted right around it because the lack of other points of reference meant the pilot could sometimes get disorientated, especially after a banked turn.
It gave a passenger an exposed feeling especially having no doors to speak of, plus as it was a piston engine 'copter with two x 22.5 gallon high octane fuel tanks high above the cockpit area a fire would be catastrophic.
But getting back to the image, I cannot help feeling that taking the picture from the aircraft end, using a wide angle lens with the rotor blade at an angle, pointing diagonally into one of the corners may have been more effective. With only two blades on the rotor, the 2nd is missing behind the aircraft and to me it looks a little 'emasculated'.