KKO-5

Russian pressure suit, operational 1961. The KKO-5 partial pressure suit was introduced for pilots of Mach 2 aircraft such as the MiG-21 and Su-9 at the beginning of the 1960's. It represented the largest production run of any pressure suit model.

The Russian VKK-4 and -6Ms partial pressure suits, as used with their aluminum GSh-4 and -6 helmets in such aircraft types as the MiG-21, bear more than superficial similarity to the American capstan-type mechanical partial pressure suits.