Seminar Abstract

AEROPLANE PROPULSION SYSTEM

A heavier than air flying machine, supported by aerofoils, designed to obtain, when

driven through the air at an angle inclined to the direction of motion, a reaction from the air

approximately at right angle to their surfaces is known as aeroplane. The various forces

which acts on the aeroplane when it travels through the air are lift force, drag force, thrust

force and its own weight. For steady condition the weight should be balanced by the lift and

drag by thrust. The lift is obtained due to the special shape of wings and thrust is obtained by

propulsion systems.

What is an air craft?

"All man made contrivances which fly, that is to say which are kept in the air by

forces produced by the air are called aircraft".

Eg: balloons, kites, aeroplanes etc.

There are two kinds of air crafts, those which are lighter than air and those which

heavier than air. The lighter than means their weight by volume is less than that of air.

Heavier than means the weight by volume is heavier than that of air. The former includes

balloons; an airship etc. and the later comprise kites and aeroplanes.

Haridas T.S S8, Mechanical