Original WW2 Military Documents for sale

** One of the individually-numbered reports issued solely to members of the Western Allies intelligence community with appropriate security clearance. Suppressed and withdrawn from further circulation for security reasons.

WW2 RESTRICTED intelligence report Copy No 234: Doblhoff Jet Propelled Helicopter

CIOS Intelligence Report. XXXI-5. Combined [British/US] Intelligence Objectives Sub-Committee (CIOS). August 1945.

** A special report covering the research work conducted by Friederich Doblhoff and associates at Wiener Neustadter Flugzeugwerke from October 1942 to the end of the war on the WNF-342 jet-propelled helicopter.

CIOS 'Black List of targets for urgent investigation' category: Jet propulsion

Duplicated typewritten report in English, 10 x 7.5 inches, 25 x 19 cms. 50 pages, 14 figures and photographs, numerous graphs.

Very good in original stapled card wrappers. Protected in a modern clear archival jacket.

Doblhoff's work was seminal research in helicopter development. The WNF-342 was the first helicopter in the world to take off and land using blade-tip jets to drive the rotor,

This classified WW2 intelligence report is part of The Barré WW2 Jets and Rockets Military Intelligence Collection of similar reports for sale.

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