Measurement of altitude in blind flying / W.G. Brombacher.
Instruments for measuring altitude and rate of change of altitude in blind flying and landing of aircraft and their performance are discussed. Of those indicating the altitude above ground level, the sonic altimeter is the most promising. Its present bulk, intermittent operation, and more or less un...
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington D.C. :
National Advisory Committee for Aeronautics,
1934.
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| Series: | Technical note (United States. National Advisory Committee for Aeronautics) ;
503. |
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| Summary: | Instruments for measuring altitude and rate of change of altitude in blind flying and landing of aircraft and their performance are discussed. Of those indicating the altitude above ground level, the sonic altimeter is the most promising. Its present bulk, intermittent operation, and more or less unsatisfactory means of indication are serious drawbacks to its use. The sensitive type aneroid altimeter is now quite generally used. Dividing the errors incident to its use into those due to the instrument and those inherent in the barometric method of measuring altitude, it is show that the instrumental errors, except the error arising from changes in instrument temperature, do not ordinarily exceed 0.75 percent of its range (20,000 feet) when useing the instrument to fly at a definite pressure level. These can be reduced to an uncertainty of 40 feet in landing at an airport if corrections are applied. |
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| Item Description: | "August 1934." NACA TN number 503. |
| Physical Description: | 34 pages, 6 unnumbered pages : illustrations, tables ; 27 cm. |
| Bibliography: | Includes bibliographical references. |