Aeroplanes being made in American factories to be shipped over Atlantic in parts for RAF use.
Title reads: "Aero engines by numbers".
United States of America (USA).
Aeroplanes being made in America, before being shipped over Atlantic in pieces to be reassembled and used by RAF.
Various shots of aeroplane engines being made in an American factory. Various shots of "expert observer" behind a glass screen, testing engine. Various shots of fighter aeroplanes being assembled in hangar. Various shots of new two engined bombed on test flight.