Dimitri Riabouchinsky (1882–1962) – Autograph - Lot 186

Lot n° 186
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Dimitri Riabouchinsky (1882–1962) – Autograph - Lot 186
Dimitri Riabouchinsky (1882–1962) – Autograph A significant selection of scientific works by Dimitri Riabouchinsky, Paris, 1930s. Including: • Report on the work directed by Professor D. Riabouchinsky, Paris, February 26, 1934. Typescript with handwritten fragments (calculation formulas, corrections). In French, 14 pp., 27 x 21 cm. The research concerns: the reconciliation of theoretical hydrodynamics and real fluid mechanics; processes capable of improving the lift characteristics of aircraft; the efficiency of high-speed propulsion systems and their potential contribution to aviation safety. • Preliminary report by M. D. Riabouchinsky on the two fixed-sum collaborations established by the Ministerial Order of December 3, 1935. 1) Improvement of the aerodynamic qualities of wing profiles at high speeds. 2) Improvement of the aerodynamic qualities of propellers at high speeds. Presented on December 23, 1935. In French, 12 pp., 10 pp. of ill., 27 x 22 cm, as is (tears at the edges). • Abstract. Some remarks on the analytical geometry of angular, discontinuous, or indeterminate shapes. Typescript with handwritten fragments (calculation formulas, corrections). 10 pp., in French, 27 x 21.5 cm, A.B.E. • Introduction to a scientific study. Typescript with handwritten fragments (calculation formulas, corrections). Undated, in French, 14 pp., 27 x 21 cm. Study on the effects of vortices on boundary layers. Dmitry Ryabushinsky (1882–1962) - Autograph An important collection of scientific works by Dmitry Ryabushinsky, Paris, 1930s. Includes: • Report on work conducted under the supervision of Professor D. Ryabushinsky, Paris, February 26, 1934. Typewritten text with handwritten fragments (calculations, corrections). In French, 14 pages, 27 x 21 cm. The work addresses the following topics: the convergence of theoretical hydrodynamics and real fluid mechanics; methods to improve the aerodynamic characteristics of automobiles, engine efficiency at very high speeds, and methods capable of contributing to aviation safety. • Preliminary report by Mr. D. Ryabushinsky on two fixed projects established by ministerial decree of December 3, 1935. 1) Improvement of the aerodynamic characteristics of wing profiles at high speeds. 2) Improvement of the aerodynamic characteristics of propellers at high speeds. Submitted on December 23, 1935. In French, 12 pp., 10 pp. ill., 27 x 22 cm, in condition (cuts along the edges). • Abstract. Several remarks on the analytical geometry of angular, discontinuous, or indeterminate forms. Typewritten text with handwritten fragments (calculation formulas, corrections). 10 pp., in French, 27 x 21.5 cm, generally in good condition. • Introduction to scientific research. Typewritten text with handwritten fragments (calculation formulas, corrections). Undated, in French, 14 pp., 27 x 21 cm. Study of the influence of vortices on boundary layers.
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