3 Answers
Why Do Constant Speed Prop Airplanes Have Manifold Pressure Gauges? (91.205)
Asked by: Drew 12404 views Aircraft Systems, FAA Regulations, General Aviation
As far as I know, 91.205 only requires manifold pressure gauges for aircraft with high altitude engines, which I understand to be engines with turbo/superchargers. Yet, every controllable pitch prop plane I've seen has a manifold pressure gauge. Is it because the higher pitch that can be used at higher altitudes yields seal level performance and therefore is categorized as a high altitude engine?
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