![]() ![]() There are two basic instruments that enable this procedure – an altimeter and a vertical speed indicator (VSI). A plane will fly at a constant altitude and will follow the curvature of the earth and would not gain altitude during a level flight.įor instance, if a plane is cleared to maintain 35,000 feet, by regulations, the pilot must maintain that level based on a standard barometric pressure setting (29.92 inHg or 1013 millibars) Hence it would stay at that altitude (F元50) because the pilot is either controlling the plane manually or has engaged the autopilot to achieve that. ![]() In other words, if a plane was trimmed for straight and level flight, would it “gain altitude” while flying as the earth surface “fell away” due to the curvature? ![]() a 6 foot person will disappear over the horizon 3 miles away, does a jet aircraft need to be constantly adjusted nose down to adjust for the curvature of the earth? I was wondering since the earth is spherical and the curvature is approximately 6 foot “drop” for every three miles i.e. I have limited flying experience (two introductory flight lessons in a Cessna and several commercial flights, including some Transatlantic trips), so please excuse my ignorance. ![]()
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