Related Experiment Video
Updated: Jun 5, 2026

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures
Published on: October 3, 2016
[+Gz protection provided by tilt-back seat and GZ-2 anti-G suit]
Yan Xu1, Xi-Chen Geng, Hong Wang
1Institute of Aviation Medicine, Air Force, Beijing 100036, China.
Aim:
To investigate the +Gz protection provided by tilt-back seat and GZ-2 anti-G suit.
Methods:
6 subjects were exposed to centrifuge and onset rate is 3 G/s. First, their relaxed +Gz tolerances were determined while using tilt-back seat of 13 degrees. Secondly, it was their +Gz tolerance provided by pressurized GZ-2 anti-G suit and tilt-back seat of 13 degrees. Finally, their +Gz tolerances while using pressurized GZ-2 anti-G suit and tilt-back seat of 45 degrees were determined. The difference between the first and the third result was the +Gz protection that pressurized GZ-2 anti-G suit and tilt-back seat of 45 degrees offered.
Results:
+Gz protection of pressurized GZ-2 anti-G suit and tilt-back seat of 13 degrees was 3.06 G, and +Gz protection of pressurized GZ-2 anti-G suit and tilt-back seat of 45 degrees was 4.13 G, which had an increase of 1.06 G.
Conclusion:
Tilt-back seat of 45 degrees can greatly enhance +Gz tolerances of human.
More Related Videos
Related Concept Videos
Zones of Protection
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
Personal Protective Equipment
Transmission-based Precautions II: Airborne and Protective Environment
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Zero-Force Member
One critical concept in truss design is the idea of zero-force members. It refers to a truss member that experiences no stress under loading conditions.
Clearance Models: Compartment Models
Normal and Tangetial Components: Problem Solving

