 The Mk . VI had a brief overseas career . One of the early units was experimentally fitted to a Hurricane Mk . IIc , and this led to a production of a single flight of such designs starting in July 1942 . These conversions were given such a low priority that they were not complete until the spring of 1943 . Some of these aircraft were sent to Calcutta where they claimed a number of Japanese bombers . An experimental fit on Hawker Typhoon <unk> <unk> was carried out , with the system packed into a standard underwing drop tank . This was available in March 1943 and underwent lengthy trials lasting into 1944 , but nothing came of this work . 
