World's Greatest Air Show Will Boost British Exports -- an unusual view of the "Flying Drainpipe" - the Ciervr W.9 helicopter. In this aircraft the normal torque-compensating screw at the tail is replaced by a vent through which gases form the engine are ejected down the tubular construction of the fuselage. Six thousand guests from many countries are attending the world's greatest aircraft exhibition and flying display which opened to-day (Tuesday) at the Handley-page aerodrome at Radlett, Herts, over70 different aircraft, ranging from giant airliners, Jet-propelled military aircraft and private-owner planes to gliders, are there to attract the foreign huyer. September 9, 1947. (Photo by Reuterphoto)