HC Deb 30 November 1938 vol 342 c415
60. Mr. Perkins

asked the Secretary of State for Air whether the de-icing devices now fitted to the Handley-Page Harrow heavy bomber in use in the Royal Air Force are proving satisfactory?

The Secretary of State for Air (Sir Kingsley Wood)

Two devices have been undergoing trial. One breaks up ice when formed by the alternate expansion and contraction of rubber tubes on the leading edge of a wing or tail unit; the other distributes a chemical fluid over the vulnerable surfaces which tends to prevent the formation of ice, or melt it if formed. The former has proved satisfactory in the trials while the latter is still in course of being improved upon.

Mr. Perkins

If one kind has proved satisfactory, is there any reason why it should not be fitted to all new air liners?