Vasiliy Grabin

Vasiliy Gavrilovich Grabin (; – 18 April 1980) was a Soviet artillery designer. He led a design bureau (TsAKB) at Joseph Stalin Factory No. 92 in Gorky (Nizhny Novgorod).
Grabin was chief designer of ZiS-3, the divisional field gun, which was the most numerous cannon of World War II (over 103,000 cannons were built).
Grabin was the first who used ergonomics in cannon construction (before the word ergonomics appears). In the 1930s he used physiologist consultation to optimize the design of cannons.
Further reading.
Широкорад А.Б., "Гений советской артиллерии: Триумф и трагедия В. Грабина", ООО «Издательство АСТ», 2003, 429 pp., .