Why do planes fly at 40000 feet?

The biggest reason for this altitude 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. Spending less on fuel is also great for airlines, for obvious reasons.

86.8K

735.8K views
2023-11-01 05:57:25

Show all Q/A Info

Can planes fly for 22 hours?
Other record flights (non-scheduled)
Boeing 777-200LR (N6066Z) flew a demonstration flight from Hong Kong to London non-stop in 2005 in an unusual east-bound route, setting a new world record at the time for a commercial airliner at 21,602 kilometers covered in 22 hours 42 minutes.
2024-01-20 10:26:02

Why do planes fly better in cold air?
So why do planes perform better in cold weather? Simply, colder air is denser than warmer air, which contributes to engine performance and air lift.
2023-12-11 04:29:04

Can planes fly in extreme heat?
“During times of extreme heat, the air is less dense and generates less lift,” the Federal Aviation administration explains in a statement regarding the phenomena. And “less lift” is exactly what it sounds like — certain planes with heavier passenger or cargo loads simply have a tougher time getting off the ground.
2023-08-23 19:59:34

Why don t planes fly over tibet?
The leading reason for aircraft avoiding the region is the high average height of the terrain. This is over 14,000 feet. Aircraft, of course, cruise much higher than this. But the procedure in the event of an emergency such as cabin depressurization is to descend to 10,000 feet before diverting to an airport.
2023-01-14 07:31:32

Recommended Next Q/A:
Is vega hot or cold?