US2978037 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:
Stabilizing means for helicopter aircraft
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, the inventor of record, 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 Rochen description in the same dossier mentions "a single fin and rudder … to help with lateral stability at higher speeds," which is the only stability feature the source attributes to the aircraft. The source does not state that US2978037 covers that feature.
Related patents in the same dossier
DE953938 — Kombiniertes Hubschrauber-Drachenflugzeug, CA587730 — Flying Machines for Vertical and Horizontal Flight, GB768190 — Improvements in Flying Machines for Vertical and Horizontal Flight, DE950169 — Hubschrauber mit Schraubenblaettern.
Source notes & attribution
- Rex Research, "Heinrich FOCKE: Helicopter Glider," https://rexresearch.com/FockeRochen/FockeRochen.html (retrieved 2026-09-17).
- https://rexresearch.com/FockeRochen/FockeRochen.html