The design, construction and test of a direct reading engine indicator (1917)
Tower, Alexander McJunkin, Siegmund, Humphreys Oliver · leaf 74
es were made. Table 3. Calibration Data on a 20-Pound Spring. Piston Area .025 Square InchManganin Bridge Wire, Cross-Section .00096 Square Inch. Pounds per Curve 1 Curve 2 Bridge Wire Square Inch Galvanometer Readings Current 0 0 0 1.0 5 0.6 0.6 1.0 10 1.5 1.3 1.0 15 2.5 2.0 1.0 20 3.35 3.4 1.0 25… … 33 Later for purposes involved in other tests, the potentiometerequipment was removed from the hydraulic and put on a Crosby gas-engine indicator with a piston area of .25 square inch and a 100-pound gas-engine spring. Figure 34 shows the calibration curve ofthis instrument and Table 4 gives the…
Internal combustion engines · Theses
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