Can planes fly at 100 000 feet?

Sandercock says there is a practical limit to how high Perlan 2 or any glider can fly. Cracking 100,000 feet would require flying at Mach 0.7 or Mach 0.8, and “giant amounts of thrust” would be required to push the aircraft through the transonic drag of those speeds, he says.



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Most commercial airplanes have a certified maximum altitude of about 40,000 to 45,000 feet. Regardless of its certified maximum altitude, if an airplane flies too high, it may fail in one or more ways. For starters, the engine may suffocate from a lack of oxygen.

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It was in 1977 that the highest current altitude record achieved by a manned air-breathing jet engine propelled aircraft was set, when Alexandr Fedotov flew to a height of 123,520 ft in a Mikoyan Gurevitch E-266M. That's about three times the normal cruising altitude of a passenger jet!

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Can you fly at 80000 feet? The US Air Force U-2 reconnaissance aircraft flies at 72 000 feet almost every day for many hours. The world's fastest manned aircraft, the SR-71, flew for many years at 80 000 feet and higher.

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As the partial pressure of oxygen in inspired air continues to drop with increasing altitude, signs and symptoms of hypoxia become more evident, and include loss of peripheral vision, skin sensations (numbness, tingling, or hot and cold sensations), cyanosis, euphoria, and eventually unconsciousness at higher altitudes ...

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Tim Morgan, a commercial pilot writing for Quora says aircraft can fly above 40,000 feet, and hence it is possible to fly over Mount Everest which stands at 29,031.69 feet. However, typical flight routes do not travel above Mount Everest as the mountains create unforgiving weather.

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Question: What is the highest altitude an airplane can fly? Answer: The highest commercial airliner altitude was 60,000 feet by Concorde. The highest military air-breathing engine airplane was the SR-71 — about 90,000 feet. The highest airliner flying today reaches 45,000 feet.

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Because the Earth is a three-dimensional sphere and not merely a two-dimensional flat, East-West surface. Because of this spherical shape, often times the shortest distance is flying more north and south, up over the Northern latitudes and the North Pole, rather than flying east/west over the Pacific.

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Commercial jets, however, have more sensors and control measures to prevent midair collisions, meaning they generally aren't affected by traffic. Private jets lack the high-tech sensors and controls of commercial jets, so pilots operating them typically fly at a higher altitude where there's less traffic.

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Flights may be canceled due to wind, precipitation, fog or low visibility, lightning, low clouds, or storms.

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“Jet fuel begins to gel in extreme conditions and does eventually freeze, typically at minus 40 or so, although additives can be included that reduce that further,” says Haines. “Aircraft at cruising altitude will often experience temperatures of minus 50 to minus 70 F for hours on end.”

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Large part of the Black Sea is considered a risk area as well, due to Russian fleet operations. Furthermore, due to sanctions, western airlines do not fly through Russian airspace.

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Currently, the bragging rights for the longest flight in the world belong to Singapore Airlines' New York City to Singapore route. Its longest flight path, which connects Singapore's Changi Airport with New York's John F. Kennedy International Airport, 9,585 miles away, takes 18 hours and 40 minutes.

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An altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.

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