Forced to turn back from his first Cape and back record attempt after a magnificent non stop flight to Cairo Mr T Campbell Black - winner with CWA Scott of the London-Melbourne ari race - is making final preparations to his Comet machine Boomerang at Hatfield Aerodrome in readiness for another attempt on the record Boomerang - an improved type of the Comet in which he won the Australia air race - has a cruising speed of over 200 miles an hour and a non stop flying range of 2,500 miles Photo shows T Campbell Black and his radio operator J H G McArthur ( in cockpit ) about to make a test flight as part of their final preparations at Hatfield Aerodrome September 17th 1935