DE953938 — Kombiniertes Hubschrauber-Drachenflugzeug

DE953938 is one of five patent documents linked from the source dossier on Heinrich Focke and the Focke Rochen. The title is given on the archive page as:

Kombiniertes Hubschrauber-Drachenflugzeug mit in ihrer Steigung verstellbaren Luftschraubenblaettern

("Combined helicopter–glider aircraft with propeller blades adjustable in their pitch.")

What the source provides

The archive page supplies only the patent number, the title as quoted above, and a link to a PDF hosted on the source archive. It does not give filing or grant dates, inventors, claims, drawings or a description of the patent's contents, and it does not state which stage of the Rochen project the patent corresponds to.

Context

The title's reference to a combined helicopter and glider with pitch-adjustable propeller blades is consistent with the Rochen's described dual role — vertical lift by ducted propellers and gliding flight with the Downwash Vectoring Louvers closed. The source does not make that connection explicitly.

Related patents in the same dossier

US2978037 — Stabilizing Means for Helicopter Aircraft, CA587730 — Flying Machines for Vertical and Horizontal Flight, GB768190 — Improvements in Flying Machines for Vertical and Horizontal Flight, DE950169 — Hubschrauber mit Schraubenblaettern.