LEEVENSPARK

Steering Components 27.7.1. Steering Column The steering column is primarily a supported shaft that connects the driver's steering wheel to the gear unit. The steering column in the modern automobile is a complex mechanism. It is designed to collapse in a collision to protect the driver. In some installations it may be tilted and telescoped to place it at a convenient angle for the driver. It also contains steering gear and transmission locks. A panic stop through braking slows the vehicle at the maximum deceleration rate of 6 m / s and the required time to stop the vehicle from 32 kmph is 1.5 seconds. This panic stop tends to lift the passengers and driver from their seats and carry them into front of the compartment, unless they are secured with seat and shoulder belts. In a head-on collision, two collisions actually occur. The first is the vehicle's collision with the object and the second is the occupants' collision with the instrument panel and windshield in the front

Separate Rear-wheel Parking-brake Mechanism In this parking-brake shoe-expander, the hydraulic foot-brake cylinder body is bolted to the back-plate. A piston at each end actuates the shoes. A link-strut bridges the two shoes, one end connecting against one shoe web and the other end acting as the pivot point for the parking-brake lever attached to the other shoe. Two alternative lever layouts are presented in Fig. 28.44. It is perpendicular to the shoe in Fig. 28.44A and is parallel to the shoe in Fig. 28.44B. The cable is joined to the free end of the lever. The cable pull, due to application of the hand-brake, pivots the lever. The strut, pushed by the lever one way, actuates the leading shoe and levers the trailing shoe in the opposite direction. The expanding force is shared equally between them as the link-strut floats between the two shoes. Fig. 28.44. Separate rear-wheel hand-brake lever. Fig. 28.45. Pressure-regulating valve. 28.8.6. Pressure Regulating Valve This valve (Fig. 2

The greatest challenge posed by trans-galactic exploration may be the re-engineering of human life spans to match the time required for travel between star systems.

Single-piston wheel-cylinder units are normally used on front drum-brakes, to provide higher braking efficiency. Two single-piston units are fitted diametrically opposite each other. The single-piston unit expands one shoe against the drum and acts as the anchor abutment for the other shoe, thus performs the dual functions. If the outward movement of both the single-piston units is in the direction of forward rotation of the drum, the combination is known as a two-leading-shoe brake (Fig. 28.41).                                                            single piston wheel cylinder Similar to the double-piston units, the single-piston units are bolted to the back-plate. These units work in similar way to that of the double-piston ones, except that the cylinder has a blind end to form the anchor abutment for the other shoe. Either the ring-seal or the cup seal with a seal-spreader and retainer-spring is used to seal the piston.

Saturn's moon , Enceladus , is covered with geysers shooting plumes of water vapor, icy particles and organic compounds. Instruments aboard NASA's Cassini spacecraft detected have carbon, hydrogen, oxygen, nitrogen and various hydrocarbons in the gas plumes.                                       New data from NASA's Cassini spacecraft indicates one of Saturn's moons, Enceladus, may have a fizzy ocean capable of harboring life.                                                                           The findings could explain the vast icy plumes of water that spray into space through fissures -- known as tiger stripes -- on the moon's frozen surface. "Geophysicists expected Enceladus to be a lump of ice, cold, dead and uninteresting," lead Cassini planetary scientist Dennis Matson from NASA's Jet Propulsion Laboratory in Pasadena California said. Instead scientists have recently discovered the moon is covered with geysers shooting plumes of w

Indian National Anthem We all know that Indian National Anthem was written by the poet Dr."Rabindranath Tagore" in the year 28th Feb 1919 in Andhra Pradesh at Madanapalli when he was working as Chanclor of the St.joseph School which was written in the bengali language later on the request of the students of that school asked to change it into english. So,Tagore stayed their for two days and changed the poem into English with a meaning.                  At that time Mrs.Cozenes his wife is working as a principle of the same school gave the tune for that song.It was past 180 years from the date he had written the poem.

Image via Wikipedia Welcome to Microcom's Space Bookshop. Click on one of the buttons below to enter one of Microcom's two regional bookshops. Microcom's Space Bookshop sells a vast range of book on all aspects of professional and amateur astronomy, astrophysics, space research, space exploration, human spaceflight, commercial space applications and space technology. For convenience, our books are divided into the following categories: Astronomy Astronomy is a natural science that deals with the study of celestial objects (such as stars, planets, comets, nebulae, star clusters and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe. Astronomy is one of the oldest sciences. Prehistoric cultures left behind astronomical artifact