377 STECHKIN 



Form of occurrence and conditions of initial migration of 

 radioelements in nature. Uspekhi Khim., 1943, 12, #4. 

 Colloidal properties of polonium. Report. Izvest. Akad. 

 Nauk S.S.S.R., Otdel. Khim, Nauk, 1956, #7. 

 Role of secondary processes in determination of the age of 

 rocks by radioactive methods. Geokhimiya, 1956, #5, 18-29. 

 Condition of microquantities of radioelements in liquid and 

 solid phases. Uspekhi Khim., 1957, 26, #4, 389-398. 

 and Yu. A. Barbanel' . Investigation of several functions 

 characterizing the state of substances in solution. Doklady 

 Akad. Nauk S.S.S.R. 146, #6, 1352-55 (1962). 

 Office: Commission on Absolute Age of Geological For- 



mations, USSR Academy of Sciences 



Leninskii Prospekt, 14 



Moscow, USSR 



STECHKIN, BORIS SERGEEVICH (Heat and Aeronautical 

 Engineer) 



B. S. Stechkin was born July 24, 1891. In 1918 he graduated 

 from Moscow Higher Technical School. He was a student of 

 N. E. Zhukovskii, the founder of Russian aviation, and with him 

 helped found the Central Aerodynamic Institute. Stechkin is 

 one of the organizers of the Aeronautical Engineers' Academy 

 in Moscow where he became a professor in 1921. From 1918 

 to 1929 he also taught at the Moscow Higher Technical School 

 and from 1933 to 1937 at the Moscow Aviation Institute. In 1954 

 he was made Director of the Engine Laboratory of the U.S.S.R. 

 Academy of Sciences. He was elected a Corresponding Member 

 of the U.S.S.R. Academy of Sciences in 1946, and in 1953 an 

 Academician. 



Stechkin calculated the heat balance for aviation engines and 

 developed methods for constructing aviation engines with rapid 

 and cool characteristics. He derived formulae for the calcu- 

 lation of air intake in aircraft engines, and for defining the 

 coefficient of air filling and indicator of useful work of aircraft 

 engines. In 1929, he published "A Theory of Jet Engines" which 

 presented a theory of jet propulsion. In technology, he further 

 improved the theory of jet engines and facilitated the develop- 

 ment of their characteristics. 

 Bibliography: 



Aviation Engines, I. Moscow: 1922. 



On the heat calculus of engines. Air Force Technology, 



1927, #2. 



