sentences:  As with his first aeroplane, the fate of the Watson No.2 is unknown, although it was probably scrapped with the outbreak of the Great War.Probably buoyed by the success of achieving powered flight in one of his own aeroplanes, Watson built a third machine, his last, in 1913.His third aeroplane was deliberately designed to supersede his No.2 in capability, since his theories had been proven in flight.