Devices For Protection Against Negative Acceleration Part 1. Centrifuge Studies
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Report Number: WADC TR 52-87
Author(s): Sieker, H. O.
Corporate Author(s): Aero Medical Laboratory
Date of Publication: 1953-11
Pages: 22
DoD Task:
PB Number: PB142259
Identifier: AD0002135
AD Number: 2135
Abstract:
Human subjects were exposed to negative acceleration with and without protection. The tolerance limit for negative acceleration was established as 2.5g for unprotected subjects in the upright seated position. The acceleration was limited to this level by the subject's discomfort and the bradycardia noted in the electrocardiogram. Conjunctival hemorrahages and cardiac asystoles were noted at 3g. When the subject in the upright seated position was protected by means of counter pressure about the head and neck, the tolerance to negative acceleration was increased to 5g. The tolerance limit for negative acceleration was found to be 4g in the negative -g aspect of the USAF prone position bed.
Author(s): Sieker, H. O.
Corporate Author(s): Aero Medical Laboratory
Date of Publication: 1953-11
Pages: 22
DoD Task:
PB Number: PB142259
Identifier: AD0002135
AD Number: 2135
Abstract:
Human subjects were exposed to negative acceleration with and without protection. The tolerance limit for negative acceleration was established as 2.5g for unprotected subjects in the upright seated position. The acceleration was limited to this level by the subject's discomfort and the bradycardia noted in the electrocardiogram. Conjunctival hemorrahages and cardiac asystoles were noted at 3g. When the subject in the upright seated position was protected by means of counter pressure about the head and neck, the tolerance to negative acceleration was increased to 5g. The tolerance limit for negative acceleration was found to be 4g in the negative -g aspect of the USAF prone position bed.