Original WW2 report: Poppet Valves [and Wankel rotary valves] for Automotive and Aircraft Engines

A military/commercial report prepared by the Field Information Agency, Technical, and issued in small numbers by the British Intelligence Sub-Committee (BIOS), 1945.

A slim report on the German wartime production of [mainly] poppet valves. Of particular note is that this report contains an early description with photograph of a rotary valve system under development by Wankel, later of rotary engine fame ("The principle involved seems rather novel and therefore is presented for what it is worth ...").

Now sold - there are more original WW2 reports in Section E at UniqueOrRare.com.