In air to air combat, the weapnos system that has the highest agility and G maneuvering capability has a decided advantage over a less capable system. A method of increasing the G tolerance of the human portion of the system is the use of reclining seats. However, a question beyond homeostasis is that of performance capability. The modified closed loop Dynamic Environment Simulator system was employed as the experimental test bed for investigation of centrifuge pilots in the reclined position. 'The centrifuge pilots were required to fly through a series of G on G combat maneuvers and to perform target lock-on and boresight cannon firing through a predictive gunsight. reticle at a projected enemy aircraft. The performance scoring was measured as number of ballistic rounds delivered on the target. Pie seat was constructed with high heel line seat pan angle of 230 and back angles of 30,45, 5,Kii6f5* measured from G vector vertical. G suit pressures were modified to allow for comfort at more horizontal angles. Results indicate that the greter tilt angles provide for a significant degree of performance enhancement at higher G levels. The data has been developed in the form of a process model of best fit polynomial curves. Correlation of model to scores is .95 or better at each cass For a given performance level; Le., 50%, there is a 2 G increase in maneuvering capability with a change in seat back angle from 30 to 650. Also, for a given G level (8 G), there is a performance increase of 30% for the change of seat angle from 30) to 65".
D D N"OV 4.14 73Io'ae The research in this report was conducted on the Dynamic Environment Simulator (DES) located in the Environmental Medicine Division, Aerospace Medical Research Laboratory. The program ran over a period of 8 months and involved actual G time exposures that totaled over 50 hours.Significant contributions to the program were made by Ihe entire DES operating team: J. W.
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