LEGIBILITY OF AIRCRAFT INSTRUMENT DIALS: OXYGEN DURATION METER.
Abstract
CONCLUSIONS: An open face instrument is better than a closed face instrument. This applies to not only the oxygen duration meter but also to other instruments. Whole numbers are easier to read than fractions. This is not limited to the oxygen duration meter studies. The large instrument used in this experiment is superior to the small instrument. However, due to the small difference between them a small instrument can be employed when reading speed is not important and other factors indicate an advantage in using a small instrument. An empty oxygen bottle should be represented by the figure zero rather than a line. Dial graduations should be in quarter hour units. Readings should indicate increasing values in clockwise direction. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1951
- Accession Number
- AD0638868
Entities
People
- J. Sanford Davis