Who is Yevgeny Chertovsky?
Chertovsky, an engineer of Aviation Medicine Institute, was involved in early Soviet stratospheric balloon program, and co-designed the ill-fated Osoaviakhim-1. The first aircraft designed for crew wearing Chertovsky's pressure suits could have been a gigantic USSR-3 balloon that burnt down on launch pad in September 1935.
The CH-1 was a simple pressure-tight suit with helmet which did not have joints, thus requiring substantial force to move the arms and legs when pressurised. This was remedied in CH-2 and later suits, up to the 1940 CH-7. CH-3 was the first operational suit that allowed the pilot sufficient freedom of movement, first tested in flight in 1937 at 12 kilometer altitude.
Chertovsky coined the term "skafander" for full pressure suits; from the Greek words skaf and andros; skafandr has since become the term used by Russians to refer to standard diving dresses or space suits.
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"Yevgeny Chertovsky." Biographies.net. STANDS4 LLC, 2022. Web. 29 Sep. 2022. <https://www.biographies.net/people/en/evgeniy_chertanovskiy>.