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Anthropology

Portland State University

Space suits -- Testing

Publication Year

Articles 1 - 4 of 4

Full-Text Articles in Social and Behavioral Sciences

Pressure Test Results Regarding Convolute Elbow Segments And Biomedical Monitoring, Cameron M. Smith Feb 2015

Pressure Test Results Regarding Convolute Elbow Segments And Biomedical Monitoring, Cameron M. Smith

Anthropology Faculty Publications and Presentations

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 ...


Flight Test Of Pacific Spaceflight Pressure Garment Mark Ii In Bell 206 Jet Ranger, Cameron M. Smith Dec 2014

Flight Test Of Pacific Spaceflight Pressure Garment Mark Ii In Bell 206 Jet Ranger, Cameron M. Smith

Anthropology Faculty Publications and Presentations

Pacific Spaceflight’s Mark II pressure garment (model Gagarin) was test flown to 17,200 feet MSL (5,242m) while worn and operated by Dr. C.M. Smith. The garment and its portable life support system (PLSS) maintained appropriate pressure, temperature and carbon dioxide levels throughout the 47-minute flight. The suit also provided sufficient elbow mobility, due to its convolute joints, for the suited person to operate the portable life support system’s manual suit pressure setting valve and the hand-held radio.


Hypobaric Chamber Test Of Pacific Spaceflight Pressure Garment Mark I At Copenhagen University Hospital, Cameron M. Smith Nov 2013

Hypobaric Chamber Test Of Pacific Spaceflight Pressure Garment Mark I At Copenhagen University Hospital, Cameron M. Smith

Anthropology Faculty Publications and Presentations

Pacific Spaceflight's first proof-of concept pressure garment, the Mark I (model Gagarin), was worn by a test subject in a pressure chamber to test stable maintenance of blood oxygenation, body temperature and suit pressure. While breathing normal air at a simulated altitude of 4,000m (c.13,000ft) the test subject's blood oxygenation was 90%, a figure expected for an altitude of 2,590m (8,500ft). The test subject's blood oxygenation climbed back to normal (96%-95%) as the hypobaric chamber was repressurized to sea level figures. The garment successfully maintained the test subject in the first ...


Review Of High Altitude Aviation Preoxygenation / Denitrogenization Procedures And Draft Pressure Schedule For Open-Cockpit Balloon Flight To 65,000 Feet, Cameron M. Smith Nov 2013

Review Of High Altitude Aviation Preoxygenation / Denitrogenization Procedures And Draft Pressure Schedule For Open-Cockpit Balloon Flight To 65,000 Feet, Cameron M. Smith

Anthropology Faculty Publications and Presentations

Aviation Decompression Sickness (DCS) is a well-known and well documented phenomenon in which a spectrum of physiological and cognitive symptoms result from aircrew exposures to altitudes greater than roughly 10,000 feet, where atmospheric pressures and the partial pressure of oxygen are significantly lower than the mean pressures in which the human body has evolved. The main factors involved in the likelihood of DCS are (a) exposure altitude, (b) exposure time at altitude, (c) preoxygenation / denitrogenization duration and procedure and (d) exercise at the exposure altitude. Mitigation of DCS is largely achieved by (a) preoxygenation / denitrogenization before flight, (b) use ...