PRINCIPAL TNVESTIGATOR(S ): James P. Henry 



EXPERIMENT TITLE/NUMBER : 



PROGRAM/MISSION : Mercury 5 (MA-5) 



CLASSIFICATION : Animal - Chimpanzee ( Pan troglodytes ) 



DISCIPLINE(S) : Behavioral science, Environmental health 



OBJECTIVES : To evaluate the safety of the Mercury spacecraft for manned 

 orbital flight and determine the physiological effects of weightlessness. 



PROTOCOL : The chimp, "Enos" was trained for 1263 hrs. during a 16-mo. period, 

 and was successfully launched in a Mercury capsule and recovered. Data from 

 flight (which was not telemetered) was then analyzed. 



EQUIPMENT : ECG electrodes of stainless steel wires threaded subcutaneously , 

 pneumograph, rectal thermistor, psychomotor testing equipment, Foley catheter 

 (to collect urine), intravascular catheters (for arterial and venous pressures 

 recorded inflight but not telemetered), 0-g food and water dispensers, chimp 

 couch system, and photography equipment. 



RESULTS : Blood pressure was high and cardiac rhythms were irregular because 

 of an instrumentation problem. The chimpanzee successfully performed complex 

 multiple operant tasks and returned in good physiological condition. 



CONCLUSIONS : This experiment demonstrated the validity of the capsule 

 environment control system for subsequent use with man. It showed that the 

 vehicles could be successfully recovered, and that short-term weightlessness 

 had no adverse physiological effects. 



PUBLICATIONS : 89, 262, 264, 351, 388, 451, 477, 558 



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