Many business jets can travel even higher, at 50,000 feet, due to having large engines for the small size of the aircraft. The lighter weight enables these aircraft to climb higher more easily than larger jets with many passengers and materials.
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For example, the Airbus A320 has a maximum altitude of 39,000 feet (11,900m) and the Boeing 747 45,000 feet (13,700m).
Military Reconnaissance Aircraft:The Lockheed SR-71 Blackbird had a service ceiling of FL850 and routinely operated above FL600. Many other aircraft in this category (e.g. MiG-25, Tsybin RSR, U-2, RB-57F, M-17 and M-55) can also fly above FL600.
Flying beyond the altitude of 60,000 feet entails the risks of structural failure, physiological hazards, and decreased operational efficiency. Commercial airliners are specifically engineered for lower altitudes, and exceeding these prescribed limits may also give rise to aerodynamic complications.
Most flights are intended to spend as little time as possible over water, since storms are more common over the ocean than on land. An aircraft would not be safe to fly over the Pacific Ocean due to the stormy weather and frequent lightning strikes that occur there.
The sweet spot of flying is regarded as between 35,000 and 42,000 feet (the airline industry still uses feet and inches as its standard measurements) – too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater.
Most commercial airlines that travel between East Asia and the Americas avoid flying over the Pacific Ocean due to high costs and safety concerns, such as the risk of flying during stormy weather.
The primary reason airplanes don't fly over the Pacific Ocean is because curved routes are shorter than straight routes. Flat maps are somewhat confusing because the Earth itself isn't flat. Rather, it's spherical. As a result, straight routes don't offer the shortest distance between two locations.
The MLW is set in order to ensure safe landings; if an aircraft weighs too heavy during touchdown, it may suffer structural damage or even break apart upon landing.
In jet aircraft, an overspeed results when the axial compressor exceeds its maximal operating rotational speed. This often leads to the mechanical failure of turbine blades, flameout and total destruction of the engine.
Some aircraft damage from lightning strikes includes broken lighting and windows, deformed antenna placements, and onboard electronics malfunctions. Other abnormalities or warnings on the flight deck, such as cabin air pressurization problems or false alarms, can occur after your airplane has been struck by lightning.
And that at cabin altitudes above 14,000 feet pilots must use oxygen at all times. And that above 15,000 feet each occupant of the aircraft must be provided supplemental oxygen. All of this is spelled out in Federal Aviation Regulations Part 91.211.
Most insects can fly as long as they are in air that's about fifty degrees Fahrenheit, or warmer. If the air temperature at ground level is about seventy degrees, insects have about thirty-six hundred feet before they hit the ceiling and it's too cold. On ninety-degree days, that border is at about six thousand feet.