FAA Office of Aerospace Medicine
Civil Aerospace Medical Institute

Report No: DOT/FAA/AM-23/5

Title and Subtitle:CGEM User’s Guide

Report Date: May 2021

Authors: Copeland, K.

Abstract: This report is a guide to the use of the Civil Aerospace Medical Institute (CAMI) G Effects Model (CGEM) software. The software models effects of extreme Gz accelerations, including visual symptoms, G-LOC, and return to consciousness following G-LOC. The software accommodates Gz acceleration profiles experienced by most civilian and military pilots and also reproduces historical centrifuge experiments. Effects such as dehydration and fatigue are readily accommodated through changes in physiological parameters. Future planned developments include extending the model to include monitoring additional brain centers, anti-G equipment failure, an improved lung function model, direct inclusion of a library of acceleration profiles for standard maneuvers used in aerobatics, and a more user-friendly means of inputting effects of pilot dehydration and fatigue beyond adjusting the current input parameters.

Key Words: G-LOC, blackout, aerobatics, peripheral light loss, G tolerance, acceleration

No. of Pages: 29