THE PURPOSE OF THIS STUDY WAS TO DEVELOP A METHOD FOR DETERMINING OBJECTIVE MEASURES OF TRAINER AIRCRAFT EFFECTIVENESS TO EVALUATE PROGRAM ALTERNATIVES FOR TRAINING PILOTS FOR FLEET FIGHTER AND ATTACK-TYPE AIRCRAFT. THE TRAINING SYLLABUS WAS BASED ON AVERAGE STUDENT ABILITY. THE BASIC PROBLEM WAS TO ESTABLISH QUANTITATIVE TIME-DIFFICULTY RELATIONSHIPS. THE TIME DEMAND METHOD WAS DEVELOPED DURING THE STUDY AND APPLIED AT THE INDIVIDUAL SUBTASK-INCREMENTAL TIME LEVEL. IT WAS FOUND THAT THE LANDING APPROACH OPERATION WAS THE PRIMARY DETERMINANT OF AIRCRAFT PHASING IN TRAINING. A PLOT OF LANDING APPROACH COMPLEXITIES VERSUS STAGE COMPLETION TIME REVEALED A MATHEMATICALLY DEFINABLE AVERAGE LEARNING CURVE WITH A HIGH CORRELATION OF DATA POINTS. OTHER TRAINING STAGE COMPLEXITIES ALSO CORRELATED WELL WITH THIS CURVE. ESTIMATES OF THE TIME IMPLICATIONS OF TRAINER AIRCRAFT, TOGETHER WITH ADDITIONAL TYPES OF ANALYSES, LED TO VARIOUS CONCLUSIONS ON THE FLIGHT TRAINING PROBLEM. THE PROPOSED UTILIZATION PERIOD FOR THIS METHODOLOGY IS 1968-78. THIS DOCUMENT, AD-651-421, IS AVAILABLE FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VA. 22151. MICROFICHE $0.65, HARDCOPY $3.00. (AUTHOR/LY)