Twin Turbo Engine Repair Research Paper Example | Topics and Well Written Essays - 500 words

Twin Turbo Engine Repair - Research Paper Example A twin turbo engine is that type of engine which has two such turbo chargers installed at its intake manifold. Twin turbo chargers can be used for in parallel (to increase the amount of charge) or sequential (to increase the pressure of charge) operation. Examples of cars using such engines are Toyota Supra and BMW N54 etc. The current paper addresses one of the major repair problems for a twin turbo engine. Overhauling a Turbocharger: Most of the turbocharger users prefer to replace the whole turbocharger assembly in case of a fault. This is because of the complexities that arise during the repair of the assembly. The most important challenge during a turbocharger repair arises due to the small size of the components. This makes the vital parts such as bearings, turbine and compressor blades, seals etc. inaccessible for the repairer. Specialized tooling is required to perform most of the operations which is not readily available. All the operations from checking bearing play to misa lignment of the components require special expertise. However, we shall discuss here the challenges that arise while cleaning the insides of a turbocharger in a twin turbo engine. In a normal engine overhaul, engine degreasers are used to clean the insides of the engine and make it spot free.

Ancient world artifacts Research Paper Example | Topics and Well Written Essays - 1250 words

Ancient world artifacts - Research Paper Example It was during this civilization that important inventions such as the wheel, the art of writing and communication, and the development and construction of cities were made (Pollock, 1999, Pp.3). The civilization flourished between 4000 – 1200 B.C., although the development and settlement of civilizations began as far back as in the 7000 B.C.E. during which the ancient Mesopotamians first learned to farm and herd cattle for livelihood (Armstrong, 2002, Pp.1). The artifacts studied for the purpose of this paper, include: The Sickle sword and the Cylinder seal with modern impression of a winged horse, both of which belong to the middle Assyrian period. The Assyrians were known for their cuneiform writings / inscriptions on clay as well as other instruments. The cruciform form of writing was a way developed during this period to record history and is found in several historiographic documents during this period (Thomason, 2005, Pp. 51). Overview of the Objects:? i) The Sickle Swor d 13th Century B.C. Middle Assyrian Period Source: www.metmuseum.org This curved sword belonged to the Middle Assyrian period, during the 1307 - 1275 B.C. in Mesopotamia. It is made of bronze and contains cuneiform inscriptions on it which mentions the name of the then ruler and King of Assyraia, thus indicating the period and the owner to whom it belongs. The sword has inscriptions on three different places i.e. on both the sides of the blade as well as on the edge / handle. It is called a ‘sickle’ sword because of its unusual curved shape (Bromiley, 1995, Pp. 1037). In ancient Mesopotamia almost all the swords used were sickle shaped and in fact, straight edged swords came into use much later after the end of the first millennium B.C.E. The unique quality about these sickle shaped swords was that they were considered to be very effective for slashing, rather than stabbing during warfare and the shape made it easier to harm the enemy (Bertman, 2003, Pp. 264; Bromiley, 1995). Another quality of these swords was that it was made from one single piece of metal, thus eliminating the need to attach a handle separately, which made it sturdier than the other types of swords (Gabriel, 1990, Pp. 44). The sickle sword first appeared during the Middle Bronze Age II in various places throughout Mesopotamia. It was believed to be an improvement from the battle axe which was used during the previous years. It was used during the reign of the Assyrian king Adadnirari I (Shalev, 2004, Pp. 55). ii.) Cylinder seal, 13th century B.C. Middle Assyrian period Source: www.metmuseum.org, Somervill, 2009, Pp. 22 These seals or 'stamps' were used during the middle Assyrian period as a way of stamping / signing important documents. The cylindrical object i.e. the pipe shaped objects were used to identify individuals. These seals were carved from various materials such as wood, limestone, ivory, and other similar hard materials / stones. The carving on each of these seals / stamps was unique just like signatures. The seals were used for marking goods, letters and for signing official documents. These cylinders first appeared during the 3500 B.C.E and were used continuously throughout the Assyrian period (Somervill, 2009, Pp. 22). These seals were considered to be one of the finest artifacts as well as a significant achievement of the ancient Mesopotamian civilization. The cylinder seals were first created by the Sumerians and were used in the