These papers contain the personal documents and correspondence of Constantine L'vovich Zakhartchenko, a Russian émigré and
aeronautical engineer. In the course of his engineering career, Zakhartchenko was involved with the design and development
of numerous aircraft, aircraft components, and missiles, including the jet engine afterburner, the McDonnell ZHJD-1 twin-engine
helicopter, and ZAUM-N-Z cruise missile.