Just released, the March 2021 rewards for APR Patrons and Subscribers. Included this month:
Diagram/art: a large format scan of an artists concept of the XC-14. This was printed with a large number of signatures; they seem to be Boeing engineers.
Document 1: “Project Hummingbird.” An FAA document summarizing the characteristics of STOL and VTOL aircraft circa 1961, including bogh built and proposed types. This was scanned from a clean original!
Document 2: “The Thor Missile Story.” Old, old, incredibly old school media… a film strip propaganda piece about the statues of the Thor IRBM.
CAD diagram: the WWII era German DFS 228 rocket powered high altitude recon plane, proposed operational version.