NextGen will allow planes to make what is called a continuous-descent approach (CDA), essentially letting them turn off their engines, saving tons of fuel and reducing pollutants.
In addition, the nitrogen rich gas is used for fuel tank pressurization during descent.
另外,在飞机降落过程中,富氮气体还可用于。
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Furthermore, an attainable set for initial conditions of the gravity-turn descent is deduced according to the constraints of thrust, fuel and states of the soft landing system.