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Published byJuliet George Modified over 8 years ago
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Overview and Aircraft flight mechanics
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Table of contents Introduction Different kinds of aircrafts Parts of a fixed-wing aircraft Air flight mechanics Forces acting on an aircraft Controls Kerosene Combustion of Kerosene
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Different kinds of aircrafts Lighter than air (aerostats) : - Hot air balloons - Dirigibles Heavier than air (aerodynes) : - Airplanes (fixed-wing aircrafts) - Rotorcrafts
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Parts of a fixed-wing aircraft
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Forces acting on an aircraft In steady flight, an aircraft can be considered as being acted on by four forces in equilibrium: lift, weight, thrust, and drag. Lift : portance Drag : traînée Thrust : poussée Weight : poids
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Controls There are three main movements to control an airplane : Axis of pitch : joystick Axis of roll : joystick Axis of yaw : rudder pedals
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Controls We can now deduce the function of each part of the airplane :
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Kerosene Combustion Kerosene is a flammable hydrocarbon liquid. It is widely used to power jet-engined aircraft, but is also commonly used as a heating fuel. The chemical equation of the kerosene combustion in the pure dioxygen is : C a H b O c N d S e + x O 2 y CO 2 + z H 2 O + w N 2 + v SO 2 We seek y, z, w, v, x in function of a, b, c, d, e because the exact molecular formula of kerosen is not defined (as a mixture).
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Kerosene Combustion C a H b O c N d S e + x O 2 y CO 2 + z H 2 O + w N 2 + v SO 2 According to the atoms conservation law : There must be the same quantities of each atom on each side of the equation. Carbon atoms conservation : y = a Hydrogen atoms conservation : b = 2z so z = b/2 Nitrogen atoms conservation : d = 2w so w = d/2 Sulfur atoms conservation : v = e Oxygen atoms conservation : c + 2x = 2a + (b/2) + 2e ↔ 2x = 2a + (b/2) + 2e - c ↔ x = a + (b/4) – (c/2) + e C a H b O c N d S e + (a+b/4-c/2+e) O 2 a CO 2 + (b/2) H 2 O + (d/2) N 2 + e SO 2
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