According to Harald Penrose, he was made the scapegoat for the late delivery of the Wyvern and headed into retirement in March 1952.
[7] In the 1920s, when most aircraft were biplanes, Arthur was a strong proponent of the monoplane.
[8] Most of his monoplane designs were high-winged or parasol, culminating in the Lysander.
During his career he was involved in the design of the following fixed-wing aircraft.
It was this interest in rotary winged aircraft that would lead Westland to manufacture Sikorsky helicopters in the early 1950s.