This trick goes back to some of the historic flights in air travel history. The Spirit of St. Louis, the first flight taken across the atlantic, went from West to East, the direction jet streams predominantly blow.
For those involved in the aerospace industry, the jet stream is a daily consideration, particularly for people flying from the US to Europe. The greater the temperature difference between these masses, the faster the jet can go. Imagine the speed of its shadow. Although the plane was moving at just over mph, its air speed was just mph — that's about Mach 0.
Actually, a very large part of higher turbofan efficiency is due to higher combustion temperatures, a result of better materials that can withstand higher temperatures and far more precise control over airflow inside the combustion chamber that reduces heating of the combustion chamber wall.
Since those improvements are invisible, they're often ignored. The first twin engine wide body cruises at Mach 0. The other often ignored aspect of airliner cruising speed is the variability of Mach speed vs temperature and altitude. All of those aircraft could cruise some 10 knots faster, by burning more fuel, but airlines nowadays like to cruise strictly at the lowest cost index a little slower. A and A normal cruise is Mach 0. There were not only Concorde supersonic civil aircraft, but also Tupolev Tu Phil Cassady.
The "sound barrier" is the problem. Aerodynamic drag rises very rapidly as the speed of sound is approached. Required thrust and fuel burn rise with aerodynamic drag so that it is more expensive to fly closer to or above Mach 1. Boeing proposed the Sonic Cruiser that would fly faster, but the airlines preferred the that would fly more economically. We're talking jet aircraft, so that's Jet routes above FL But they're already there, the "Q" airways. The other problem that us pilots don't quite get is often times routing can't be the way we want, otherwise it would become a nightmare for ATC.
So a more efficient engine, areo etc means we still can be at speeds in the 80s? I feel there r limits to this so we can slowly stop the exploration of the "earth" controlling the population by supposed cost etc. The fastest manes plane is still 60 yrs old. The fact this has not been broken says it all. True, but concorde was the only one that wasn't a stolen design, inherently unsafe, and financially inviable. In between these extremes, however, are military planes that fly at , , and several thousand miles per hour.
Of course, there are also single-engine planes, which on average can travel at around miles per hour. Although they are small, their speeds are not high because they are single-engine planes that are also affected by things such as wind resistance and other factors. Some single-engine planes can even fly as fast as miles per hour. Some of these planes are much bigger than others, which explains the differences in their overall speed.
In addition, when it comes to airplane speed, many turboprop planes can fly as fast as some jet airliners, although the average speed for this type of plane is roughly miles per hour. You can estimate this number if you know the number of miles between the two cities, but knowing that different planes have different speeds is also a good thing to keep in mind.
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