. The aviation pocket-book for 1918; a compendium of modern practice and a collection of useful notes, formulae, rules, tables and data relating to aeronautics . an increase in the atmosphericpressure, the motion of the arbor a winds up the coil spring R ;when the pressure decreases, the relaxation of the spring s acting DIV. ix] THE ANEROID RAROMETER 231 through the levers slackens the chain c, which is made taut againby the unw inding of the coil spring r. The adjusting pillar D isfastened to the spring s, and is moved by a screw passing throughthe base plate of the instrument, so as to brin
. The aviation pocket-book for 1918; a compendium of modern practice and a collection of useful notes, formulae, rules, tables and data relating to aeronautics . an increase in the atmosphericpressure, the motion of the arbor a winds up the coil spring R ;when the pressure decreases, the relaxation of the spring s acting DIV. ix] THE ANEROID RAROMETER 231 through the levers slackens the chain c, which is made taut againby the unw inding of the coil spring r. The adjusting pillar D isfastened to the spring s, and is moved by a screw passing throughthe base plate of the instrument, so as to bring the reading of theinstrument into accordance a\ ith that (jf a standard Correction Factors.—As it is the custom to graduate. A Arbor S Plate Spring P Pointer Q Bent Lever c Chain L Lever B Corrugated Box R Coil Spring V Pillar supporting Plate Spring 0 Adjusting Pillar these instruments at 50 F. (10 C.), a correction has to be appliedfor other temperatures, in accordance with the f(jrmula :— H 283 Where H = true difference in height between any two ; —average temperature in degree C. between the =the difference in height indicated by the aneroid. the Correction Factor is 1 O-IO1-0000-9610-92-2 0-SS8 At 70° F. 50° W 10° - 10 So that if a climb is made through 1,000 ft., as by aneioid, a\ hen the average temperature is 30is only 1,000 x 0961 ^-961 ft F., the actual distance MFTEOROLOGICAL DATA [div. IX Conversion of Barometric Hkiciit in Inches of MerccryAT 32 v., Latitude 45, to Atmospheric Pressure inMillibars. (1,0<^X) millibars are equivalent to the presj^ure of a column ofmercuiy YoiVOTO mm. (•2y580*3 in.) high at 0 C. (273 deg. )in latitude 45^) Milli- Ins. Milli
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectaeronautics, bookyear
