New Technology Bureau Publishing, 1947. — 122 s. A real sketch of the life, scientific and social activities of academician C. A. Chaplygin was compiled on behalf of the commission for the publication of the full collection of his works .. In the preparation of this essay, the author used magazine and newspaper articles devoted to the activities of C. A. Chaplygina, various materials (anniversary speeches, diplomas, etc.) p. ), as well as personal memories of an outstanding Russian scientist, wonderful organizer and public figure . Very valuable materials about the life of C. A. Chaplygina was provided to the author by O. C. Chaplygina . Much work on the collection of materials characterizing scientific and social activities C. A. Chaplygina, made by senior engineer TsAGI N . M. Semenova; the materials collected by her and formed the basis of this biography . Significant assistance in the work was provided by valuable instructions of Academician L. C. Leibenzona, Corresponding Member of the Academy of Sciences of the USSR L. N. Sretensky, a member of the correspondent of the Academy of Sciences of the USSR N. G. Chetaeva . I would like to express my deep gratitude to all the above-mentioned comrades for their friendly cooperation and assistance in the work of .. In. Dove.