The Effects of Eliminating Minor Graduations on Dial Reading Performance.
HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD
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An investigation was made to determine dial reading performance using two dial marking schemes one as they appear in current aircraft and the other with the minor graduation marks eliminated. Four instruments DC voltmeter, fuel pressure indicator, exhaust gas temperature indicator, and transmission oil temperature indicator were used to examine each scheme. Results indicated that performance was significantly better with the modified designs minor graduations eliminated. A second result was that, regardless of the design used, some instruments are significantly more difficult to read than others. Author
- Human Factors Engineering and Man Machine Systems