Space flight, Space suits
Pacific Spaceflight’s Mark II / III pressure garment (model Gagarin with one newly-built elbow segment on the left arm) was pressurized to evaluate the mobility allowed by the newly-installed convolute arm compared to the right arm’s older convolute elbow segment. Additionally a new helmet hold-down cable system was tested, as well as the C02 scrubbing system and heart rate, Sp02, suit’s exhausted gas C02 levels and a new communication system. At pressures of 2.3psi – 2.5psi the helmet hold-down cable came free of the new hardware (a sailboat’s one-way cleat system), raising the helmet ring explosively. This resulted from the hold-down cable coming free of the cleat cams due to changing geometry of the suit during inflation. All other tested elements worked well.
Smith, C. (2015). Pressure Test Results Regarding Convolute Elbow Segments and Biomedical Monitoring. Pacific Spaceflight Research Brief #2015-1