Quote:
Originally Posted by Old Tele man
Uh, 29.92-inches Hg is associated with BAROMETRIC pressure, not MANIFOLD pressure. Typically, MANIFOLD vacuum (normal aspiration)/pressure (turbo or supercharge) are measured in XX-0-14.7 PSI or ±0-30 "Hg...without decimal places.
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I meant that with engine off it reads about 30, at sea level and shows absolute pressure just exactly like the one in every airplane with a controllable pitch propeller. I do nit need Kollsman window accuracy.