For the South American air route. Presenting the Avro Tudor IV, first of the four Tudor airliners to be used by British South American Airways, which is expected to be in service by the end of September. Accommodating 32 passengers well over two tons of mail and freight, the Tudor IV is to have special tropical flying tests before going into commission. Pressurisation of the cabin accommodation will retain identical atmospheric conditions at 8000 and 20,000 feet. 22 July 1947