Flight Mechanics Basic Atmosphere Properties Standard atmosphere Classification

Flight Mechanics

Basic: Atmosphere : Properties, Standard atmosphere. Classification of Aircraft. Airplane (fixed wing aircraft) configuration and various parts;

Atmosphere : Properties, Standard atmosphere

Atmosphere & Altitude Atmosphere • Layers of Atmosphere • Significance of individual layers Types of Altitudes • Geometric altitude • Absolute altitude • Geopotential altitude Le t r a t t’s S

Atmosphere is generally defined as the layer of gases hold together by the gravity of celestial body or a Planet. Based on operation zone the aerospace vehicles are categorized as, Aircrafts and Spacecrafts. Air is a general/common name for the mixture of gases that makes up the earths atmosphere.

5 Layers of Earth’s Atmosphere

Atmosphere: Properties & Standard atmosphere Atmosphere Properties • Three major properties • Variation with Altitude Standard Atmosphere • Deriving the properties of ISA o For Isothermal region o For Gradient region • ISA Chart t r a t S s ’ t Le

Atmosphere Properties • Pressure • Density • Temperature Altitude Variation of Properties with Altitudes • • Pressure decrease with increasing altitude. Density decrease with increasing altitude. Temperature varies relatively with increasing altitude. The “Temperature” is obtained experimentally.

Q 1.

Q 2.

Q 3.

Classification of Aircraft.

Airplane (fixed wing aircraft) configuration and various parts;

Airplane Configuration

Airplane Parts