§ 35. Rear - Admiral Sir MURRAY SUETERasked the Under-Secretary of State for Air whether any research work has been done to ascertain the value of variable pitch propellers for aircraft; and if any report has been or is to be issued to the aircraft industry for their guidance?
§ Sir P. SASSOONYes, Sir; six reports on research work done by the Air Ministry in connection with variable pitch propellers have been issued to the aircraft industry since 1932, and a seventh is in preparation.