ROCKET 09

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Rockets.

AIMS: 

AIMS Introduction History How rockets work Uses of rockets Types of rockets

Introduction: 

Introduction Rocket, self-propelled device that carries its own fuel, as well as the oxygen, or other chemical agent, needed to burn its fuel. Rockets are presently the only vehicles that can launch into and move around in. A rocket can be as simple and small as a firework, which has a small amount of thrust, or as complex and powerful as the Saturn V rocket, which took humans to the.

History: 

History In the early 1800s, British inventor William Congreve noted reports of Indian rockets employed against British forces. Congreve greatly improved rockets as weapons by attaching warheads, or bombs that would explode after the rocket was launched, and by increasing the ranges of rockets. These Congreve rockets were accurate and powerful enough to use against the firearms of the early.

History : 

History The rockets still used poles, or sticks, to stabilize the rockets in Despite their stabilizing poles, Congreve rockets were often inaccurate. In 1844 British inventor William Hale invented the stickless or spin-stabilized rocket, in which the exhaust gases caused the rocket to spin in flight. The spinning helped stabilize the rocket, eliminating the need for the clumsy guidestick and making the rocket more accurate. By the 1890s, the gunpowder war rocket finally fell out of use as guns improved and again became more accurate weapons than

How rocket works.: 

How rocket works. All rockets—whether small or large, simple or complex—work by the basic principle of action and reaction, which was formulated by English scientist Sir Isaac Newton. In the case of the rocket, the expulsion of exhaust gases from the rear is the action, and the forward movement of the rocket is the. reaction.

Uses of rockets.: 

Uses of rockets. MISSILES The term missile actually means any object thrown at an enemy and includes arrows, bullets, and other weapons. In modern military usage, however, missile usually means an explosive device propelled through the air by a rocket or an air-breathing engine .

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MISSILES Missiles can be launched from the ground, from airplanes, and even from submarines. Some missiles are designed to hit targets in the air, while others are built to hit targets on the ground. Some missiles, called guided missiles, have steering systems that guide them to their target.

SOUNDING ROCKETS.: 

SOUNDING ROCKETS. Scientists use sounding rockets to carry scientific instruments into the upper atmosphere to take measurements of air quality, radiation from space, and other data. Many countries use sounding rockets to monitor weather and pollution.

Launch vehicles.: 

Launch vehicles. Launch vehicles send satellites and other spacecraft into space. These vehicles must be far more powerful than other types of rockets, because they carry more cargo farther and faster than other rockets. To place an object into orbit around Earth, the launch vehicle must reach a velocity of about 30,000 km/h (about 18,500 mph). To escape Earth’s gravitational pull entirely and head into deep space, these rockets must attain a velocity, called an escape velocity, of about 40,000 km/h (about 25,000 mph).

TYPES OF ROCKETS.: 

TYPES OF ROCKETS. CHEMICAL ROCKETS. Chemical rockets are suitable for many purposes. Large solid-fueled and liquid-fueled chemical rockets act as launch vehicles or as missiles that are capable of traveling from continent to continent.

NUCLEAR ROCKETS,: 

NUCLEAR ROCKETS, Nuclear rockets are very powerful rockets that are theoretically capable of acting as launch vehicles and long-distance space travel systems. No nuclear rocket has yet made it into space, but experimental rockets have undergone tests on Earth.

ELECTRIC ROCKETS.: 

ELECTRIC ROCKETS. Electric rocket engines use batteries, solar power, or some other energy source to accelerate and expel charged particles. These rocket engines have extremely high specific impulses, so they are very efficient, but they produce low thrusts. The thrusts that they produce are sufficient only to accelerate small objects, changing the object’s speed by a small amount in the vacuum of space.

COLUMBIA SPACE SHUTTLE : 

COLUMBIA SPACE SHUTTLE

SATURN V ROCKET.: 

SATURN V ROCKET.

MISSILE ROCKET.: 

MISSILE ROCKET.

FIRST FIRED 1942 ROCKET: 

FIRST FIRED 1942 ROCKET V-2 ROCKET

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