title: [+Gz protection of the on board oxygen generating system (OBOGS) and anti-G equipment].
abstract: OBJECTIVE
  To investigate the +Gz protection of the on board oxygen generating system (OBOGS) and anti-G equipment.
  
  
  METHODS
  Physical and physiological tests of the OBOGS and anti-G equipment were accomplished using human centrifuge. +Gz tolerance of ten male subjects with or without the anti-G suit, pressure breathing for G (PBG) and OBOGS were determined.
  
  
  RESULTS
  The performance of the OBOGS and anti-G equipment fulfilled the requirements. The +Gz protections of the anti-G suit, PBG, and anti-G system were 2.08 G, 1.92 G, and 3.92 G, respectively.
  
  
  CONCLUSIONS
  The +Gz protection of the OBOGS and anti-G equipment satisfy the performance requirements of high performance aircraft.
authors.affiliation: Institute of Aviation Medicine, Beijing, China. gengxichen@263.net
authors.forename: Xi-chen
authors.initials: XC
authors.lastname: Geng
authors.forename: Yan
authors.initials: Y
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Jin
authors.forename: Bao-hui
authors.initials: BH
authors.lastname: Li
authors.forename: Gui-ding
authors.initials: GD
authors.lastname: Yan
mesh_terms: D000054:Acceleration / Q000009:adverse effects*; D000328:Adult; D000337:Aerospace Medicine; D002498:Centrifugation / Q000009:adverse effects; D005069:Evaluation Studies as Topic; D005676:Gravity Suits; D006801:Humans; D018471:Hypergravity / Q000009:adverse effects*; D008297:Male; D011175:Positive-Pressure Respiration