Why Flights Take Longer Now Than 50 Years Ago

(FTB) – Mano Singham:

The main reason is that for most people, the main concern is the cost of travel not the time taken. It is only a very few for whom cost is not a factor and where time becomes important. But there are reasons, based on aerodynamics and the design of engines, that make the cost per passenger mile of flying most economical at speeds of 500-550 mph (800-885 km/h). The main cost in flying is not the cost of the plane but the fuel used per trip and between speeds of Mach 0.8 and Mach 1.2 (where Mach 1 is the speed of sound) is what is known as the transonic range where air drag rises dramatically. So it makes sense to stick to speeds below Mach 0.8. …

singham flights-take-longer

Concorde

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