RANGING TRACKING AIMING POINT ASSESSOR DEVICE 3-E-7.
TUFTS COLL MEDFORD MASS INST FOR APPLIED EXPERIMENTAL PSYCHOLOGY
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The assessor was intended for use in connection with a variety of problems in the operation of gunsight systems. A great deal of time was spent in attempting to make the device operate in a satisfactory manner. However, there proved to be basic weaknesses of design and construction which prevented accurate measurement. A study was finally undertaken using the Martin Electric Upper Deck and the Mark 18 Mod 4 Sight. Three subjects were given ten hours of training apiece over a period of 24 days. Azimuth error of gun pointing was reduced to a minimum after about the third hour. The time required to reach minimum ranging error differed for the three subjects, varying between three and eight hours. For elevation error of gun pointing the subjects appeared to be still improving at the end of the ten hours. Individual differences were noted, one of the subjects showing consistently better performance than the other two in regard to the aximuth aspect of gun pointing and ranging. Most of the constant error of gun pointing was in the direction of lagging behind the target. Quite consistent trends in the change of constant error were noticed for each of the subjects. These trends helped clarify the changes of average error. Continuous error curves for sample courses were examined. Some rather regular patterns appeared. The time required for a typical cycle of adjustment of error was between two and four seconds for gun pointing. Even slower adjustments of ranging error were found. Author
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