Why aren t planes faster?

One of the primary reasons for the reduction in flight speed is fuel efficiency. As the cost of aviation fuel has risen over the years, airlines have sought ways to minimize fuel consumption, and flying at slower speeds has proven to be an effective method.



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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.

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This means pilots could opt to go above the speed to make up time, although this burns more fuel - not just costing more, but affecting the environment. So pilots will likely only do it if the costs mean they can avoid other expensive issues, such as missed flight connections.

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Airplanes rely on a braking system to safely land on runways. At cruising altitude, most commercial airplanes fly at a speed of roughly 500 to 600 mph. When landing, however, they must reduce their speed.

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What's the slowest a plane can fly? The Ruppert Archaeopteryx has a certified stall speed of 30–39 kilometres per hour (19–24 mph). The Vought XF5U can fly as slow as 32 kilometres per hour (20 mph). The Tapanee Pegazair-100 stall speed is 45 kilometres per hour (28 mph).

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The power, or volume, of the shock wave depends on the quantity of air that is being accelerated, and thus the size and shape of the aircraft. As the aircraft increases speed the shock cone gets tighter around the craft and becomes weaker to the point that at very high speeds and altitudes no boom is heard.

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Penney said they are allowed to break the sound barrier in a limited number of scenarios: over the ocean or on a training range where it won't disrupt everyday life, or in an emergency with a superior's approval.

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Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.

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(a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.).

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While fuel dumps don't happen every day, they're also not uncommon. Nor do they usually represent a major emergency. In fact if an aircraft is taking the time to dump fuel before landing, that's likely an indication that the issue forcing the plane to land is serious but not critical.

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So that leaves the final descent and landing. They take up about 4% of the average flight, lasting twice as long as takeoff and initial climb. But a whopping 49% of fatal accidents occur in this short window, making the final descent and landing the deadliest part of an average flight.

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Fatigue is particularly prevalent among pilots because of unpredictable work hours, long duty periods, circadian disruption, and insufficient sleep. These factors can occur together to produce a combination of sleep deprivation, circadian rhythm effects, and 'time-on task' fatigue.

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The biggest reason for flying at higher altitudes lies in fuel efficiency. The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. Less wind resistance, more power, less effort, so to speak.

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Taxi. Limiting the amount of time spent on the ground is the easiest way for pilots to make up for lost time. While the routing in the flight plan has largely determined the time spent flying, taxiing presents an opportunity to erase a delay.

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