Preliminary Flight Tests of the N.A.C.A. Roots Type Aircraft Engine Supercharger (1928)
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this is possible the pressure at the carburetor stays well above at- mospheric pressure. The intersection of the sloping upper branch of the curve, which repre- sents operation with the supercharger by-pass valve completely closed, with the sea-level pressure line defines the critical altitude of… … Pressure, in. of Hg Time, mm. Fig. 5.—DH-4 with 1.94 gear ratio supercharger The carburetor air temperatures (figs. 5 and 7) are of particular interest from the stand point of engine operation. These temperatures differ very little from the atmospheric temper- atures at low altitudes. This…
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