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Pedrone80
12 years ago

“The maximum possible altitude is limited by 2 factors. The air density which decreases with the height and the absolutely less existing oxygen which the engine needs to perform. Engines with turbo usually reach almost 100% power even at larger altitudes, while normal internal combustion engines then already crack and the mixture has to be adjusted accordingly to lean. From a certain height, the missing air density is also added. The wing (both plane or helicopter) can no longer generate enough lift.”

Source: Hold on!

Menschheit2013
12 years ago

For normal passenger jets, this is the most economical flight altitude. That is, fast forwarding with low fuel consumption.

AppleApple17
12 years ago

because the air on top is very cold the kerosene would then freeze. because it has a very low freezing point 🙂

SpitfireFan
12 years ago
Reply to  AppleApple17

Quatsch, at a height of 15 km it is only about -50 to -60°C cold, as kerosene has not yet been frozen. For this, one would have to go beyond the thermosphere

AppleApple17
12 years ago
Reply to  SpitfireFan

yes, that’s exactly why planes fly up only 15km! and not higher where it’s colder. read more

DerLobster
12 years ago

because the air becomes too thin to generate enough boost…

baindl
12 years ago

Bring your Google to the inspection!

My first has spit this out

http://de.wikipedia.org/wiki/travelflug#cruise_climb.2CStepclimb

baindl
12 years ago
Reply to  xxxXstepXxxx

Add this to the link mutilated by GF 2Cstepclimbor go manually to point 2.2 on the linked page, then you also have the explanation.