In the air and on the water

INSIGHTS AD FLYING BOATS Channel G-NZAI of the Walsh Brothers’ New Zealand Flying School, at speed in Wellington harbour. On 12 and 15 March 1917 the first prototype AD Boat was trialled at Woolston with its new 200hp Hispano-Suiza, and a performance report compiled. On the surface the pilot found that the absence of a water rudder hindered control, while during take-off the aircraft exhibited severe fore-and-aft rocking, known as porpoising, accompanied by saturating heavy spray which reached its upper