John Gridunov, Date of Birth, Place of Birth, Date of Death
TweetJohn Gridunov
Soviet Air Force officer
Date of Birth: 
Place of Birth: Serhetabat, Mary Region, Turkmenistan
About John Gridunov
- John Ivanovich Gridunov (Russian: ???? ???????? ????????; 6 October 1926 – 12 August 2015) was a tester of former Soviet spacecraft equipment.
- Being the so-called ground cosmonaut, Gridunov conducted several environmental tests, including the explosive decompression while testing a space suit.
- He is the only person to experience a short-time acceleration of 50 g (490 m/s2), during an emergency landing imitation.Gridunov also sustained a 19 g (190 m/s2) centrifuge acceleration in the spine-chest direction without related accommodation.
Read more at Wikipedia