Pressure element of constant logarithmic stiffness for temperature compensated altimeter (1930)
NASA Technical Reports Server (NTRS) · leaf 3
l practice. The possibilities narrowed down finally to the modification of the design of the spring." A successful design was finally found which gave approximately the desired straight-line relation between deflection and altitude in the altitude range of the altimeter. STATEMENT OF THE PROBLEM… … Pressure It/sq in Figure 1.—Standard altitude varies approximately as the loga- rithm of the air pressure in which Z is the standard altitude in feet, Tm the standard mean temperature for Z, and p the air - pressure at altitude Z in millimeters of mercury... (Fo£ further details on the standard…
NASA Technical Reports Server (NTRS)
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