LEEVENSPARK

Condition for True Rolling True rolling occurs only when<the direction of motion of the vehicle is perpendicular to the wheel axis (Fig. 27.22A), i.e. the wheel is subjected to forward force. When wheel is subjected to side force that acts parallel to the wheel axis, a true scrub action is produced (Fig. 27.24B).  When the wheel is subjected to both forward and side forces, the movement is compounded of true rolling and lateral distortion (Fig. 27.22C). This condition occurs when the wheels are being steered, i.e. the direction of motion is neither parallel nor perpendicular to the axis of rotation. On a circular path, true rolling condition occurs when the projected axes of several wheels all moving in different curved paths intersect at a single point called the instantaneous centre (Fig. 27.22D). When these projected axes do not intersect at a single point, a degree of tyre scrub results (Fig. 27.22E). Fig. 27.22. Road-wheel and tyre rolling conditions.  A. True-rolling. B. True

Ackermann-linkage Geometry In parallel-set steering arms layout (Fig. 27.26A), the track-rod dimensions yi, xi andy0, x0, remain equal for all angles of turn. With the inclined arms (Fig. 27.26B and C), the inner-wheel track-rod end dimension yi, is always smaller than the outer wheel dimension y0, while negotiating a curve. On the other hand, there is very little variation between xi and x0 for small angular movements. For small steering angles about the king-pin up to say 10 degrees, there is very little difference between yi and y0 and between the inner and outer wheel turning angles. Figure 27.26B illustrates that for a 10 degrees set track rod arms if the outer wheel is turned at 20 degrees, then the corresponding inner wheel is shown to rotate 23 degrees. Similarly for the same set, for 40 degrees outer wheel turn, the inner wheel rotates 51 degrees (Fig. 27.26 C).  Therefore, for a given angular movement of the stub axles, the inner-wheel track-rod arm and track-rod are more eff

Ackermann Principle as Applied to Steering Ackermann Linkage The self propelled motor vehicle almost from the beginning, used the double pivot wheel steering system. This was invented for horse drawn vehicles in 1817 by George Lankensperger, a Munich carriage builder. In England, Rudolph Ackermann acted as Lankensperger's agent and a patent of the double-pivot steering arrangement was taken in his name. With this layout of the linkage the track rod arms are set parallel to each other and a track rod joins them together. In the straight ahead position of the steering, the linkage and axle beam forms a rectangle, but, as the stub-axles are rotated about their king pins, the steering arrangement forms a parallelogram. This linkage configuration turns both wheels the same amount. Figure 27.26A illustrates the parallel-set linkage positioned to provide both a 20 degrees and a 40 degrees turn for the inner and outer wheels. Charles Jeantand in 1878 introduced an improvement to the Acker

The Ackermann Principle as Applied to Steering The Ackermann Principle To achieve true rolling for a four wheeled vehicle moving on a curved track, the lines drawn through each of the four wheel axes must intersect at the instantaneous centre (Fig. 27.23). The actual position the instantaneous centre constantly changes due to the alternation of the front wheel angular positions to correct the steered vehicle's path. Since both rear wheels are fixed on the same axis but the front wheel axles are independent of each other , the instantaneous centres lies somewhere along an imaginary extended line drawn through the axis of the rear axle. The Ackermann principle is based on the two front steered wheels being pivoted at the ends of an axle-beam. The original Ackermann linkage has parallel set track-rod-arms, so that both steered wheels swivel at equal angles. Consequently, the intersecting projection lines do not meet at one point (Fig. 27.24.). If both front wheels are free to follow

- : : : Track List : : : - Directed by Aamir Khan Amole Gupte (creative director) Ram Madhvani ("Bheja Kum") Produced by Aamir Khan Productions 01  Taare Zameen Par      DOWNLOAD 02  Kholo Kholo             DOWNLOAD 03  Bum Bum Bole         DOWNLOAD 04  Jame Raho               DOWNLOAD 05  Maa                        DOWNLOAD 06 Bheja Kum              DOWNLOAD 07 Mera Jahan               DOWNLOAD CLICK HERE TO DOWNLOAD ALL THE SONGS [ZIPPED]

The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel. This configuration was very commonly used in large aircraft engines before most large aircraft started using turbine engines. In a radial engine, the pistons are connected to the crankshaft with a master-and-articulating-rod assembly. One piston, the uppermost one in the animation, has a master rod with a direct attachment to the crankshaft. The remaining pistons pin their connecting rods ' attachments to rings around the edge of the master rod. Four-stroke radials always have an odd number of cylinders per row, so that a consistent every-other- piston firing order can be maintained, providing smooth operation. This is achieved by the engine taking two revolutions of the crankshaft to complete the four strokes, (intake, compression, power, exhaust), which means the firing order is 1,3,5,2,4 and back

Dum Maro Dum [2011] Cast & Crew :: Abhishek Bachchan, Aditya Pancholi, Bipasha Basu, Rana Daggubati, Deepika Padukone               Music :: Pritam Chakraborty Director :: Rohan Sippy   Producer :: Ramesh Sippy Cassettes & CD's On :: T-Series Music Records                     Ripper :: Team MyMp3rack _:: Track list & Downloads ::_ 01 - Mit Jaaye Gham (Dum Maaro Dum) - Anushka Manchanda DOWNLOAD 02 -Te Amo (Duet) - Ash King & Sunidhi Chauhan DOWNLOAD 03 - Jiyein Kyun - Papon DOWNLOAD 04 - Jaana Hai - Zubin Garg DOWNLOAD 05 - Thayn Thayn - Abhishek Bachchan, Ayush Phukan & Earl DOWNLOAD 06 - Te Amo (Female) - Sunidhi Chauhan DOWNLOAD 07 - Te Amo (Reprise) - Mohit Chauhan DOWNLOAD 08 - Te Amo (Remix) - Sunidhi Chauhan DOWNLOAD CLICK HERE TO DOWNLOAD ALL SONGS IN A SINGLE FILE [ZIP]