Thrust jet engine momentum (1 résultats)

Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Please note that the content of this book primarily consists of articlesavailable from Wikipedia or other free sources online. Thrust is areaction force described quantitatively by Newton's second and thirdlaws. When a system expels or accelerates mass in one direction theaccelerated mass will cause a proportional but opposite force on thatsystem. A fixed-wing aircraft generates forward thrust when air ispushed in the direction opposite to flight. This can be done in severalways including by the spinning blades of a propeller, or a rotatingturbine pushing air from the back of a jet engine, or by ejecting hotgases from a rocket engine. The forward thrust is proportional to themass of the airstream multiplied by the velocity of the airstream.Reverse thrust can be generated to aid braking after landing byreversing the pitch of variable pitch propeller blades, or using athrust reverser on a jet engine. Rotary wing aircraft and thrustvectoring V/STOL aircraft use engine thrust to support the weight of theaircraft, and vector some of this thrust fore and aft to control forwardspeed. …