Small seaplane attached to top of large flying boat: the Short Mayo Twin Machine.
Title reads: "Rochester".
New invention, Mayo composite aircraft ready for test flight. The Short Mayo Twin Machine: the upper half is a seaplane that will take off from the water on the back of the lower flying boat. Various shots of large seaplane floating on sea, a smaller aeroplane is riding piggy back on the larger plane. Combined power of both planes' engines mean extra weight can be carried in terms of passengers and cargo. It is hoped eventually the two planes will be able to separate in mid-air.