On 12 August 1911, the Kite and Model Aeroplane Association held the second annual competition for the Gamage Silver Challenge Cup at Greenford Bridge, which was won by Ridley's "Ridleyplane No. 60" twin-screw monoplane, with a flight distance of [REF].
On 27 July 1912, Ridley took part in the third Gamage Cup competition at Greenford, but came third and thus lost his title to the winner; R. B. C. Noorduyn of the Rotterdam Model Aero Club [REF].