Abstract
The propulsion for the air vehicles is generated by the power obtained from the engines.
Especially during take-off and climb phases, the air vehicles need the maximum power.
Mainly, as presented in Figure 1, it is possible to handle the flight stages in 8 sections, 2 of
which are runway maneuvers (Taxi). The cruise phase begins immediately after the climb
phase is completed. In this stage, the fuel consumption is less than take-off and climb phases.
Although it depends on the aircraft configuration and meteorological conditions, the descent
phase, which usually takes place with a 3° nose angle, is one of the most critical stages. In this
phase, the use of fuel is less than that of the cruise.