Test and evaluation of CF-18 G-Valve prototype


  1. Lu, Z.
  2. Morel, M.
  3. Kapps, A.
  4. Galluzzi, A.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Engineering Services Inc, Toronto ONT (CAN)
The final report summarized the preliminary experimental testing program and statistical validation of novel countermeasures aimed at alleviating Push-Pull effects. The new countermeasures for active attenuation of Push-Pull effect involve applying mid-level Positive Pressure Breathing (PPB) during the Push phase in accordance with the specially formulated non-linear pressure schedules. To formally investigate the proposed countermeasures, a custom-designed statistical modelling framework ESIstat has been integrated using R language. It has been statistically demonstrated in Tilt-table experiments that the application of medium-intensity (30mmHg) PPB during -Gz followed with the application of G-suit pressure and regular-intensity PPB during the transition to +Gz attenuates the Push-Pull effect and may prevent the subsequent decrease in a pilot's G-tolerance due to -Gz exposure. If the new advanced tests planned on the upcoming Push-Pull centrifuge at DCIEM substantiate the proposed protection strategy, it might potentially constitute an efficient and practical Anti-G countermeasure. The new protection can be readily incorporated into the existing Anti-G ensemble by simply retrofitting the PPB mask/jerkin regulator.

Il y a un résumé en français ici.

Push-pull effect;G-suits;G-protection;Anti-G suits;Pressure Breathing for G (PBG);Positive pressure breathing;CF-18 aircraft;G-valves;PPB;+Gz;-Gz
Report Number
DCIEM-CR-2002-006 — Contractor Report
Date of publication
29 Oct 2001
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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