The Little Engine That Could Online English' title='The Little Engine That Could Online English' />An aeolipile or aeolipyle, or eolipile, also known as a Herons engine, is a simple bladeless radial steam turbine which spins when the central water container is. Define google to use the Google search engine to obtain information about someone or something on the World Wide Web google in a sentence. Directed by Elliot M. Bour. With Jodi Benson, Corbin Bleu, Jamie Lee Curtis, Whoopi Goldberg. Featuring an allstar cast, the timeless story comes to life in this all. Sketch Engine is the ultimate corpus tool to create and search text corpora in more than 80 languages. Enables lookup of etymologies of more than 30,000 modern English words. Useful for determining whether a modern English word is descended from Old English. These easy online jobs are a great place to start if you want to earn some extra money from home but you dont have a lot of work experience. Aeolipile WikipediaHero engine redirects here. For the game engine and server technology platform, see Hero. Engine. An illustration of Heros aeolipile. An aeolipile or aeolipyle, or eolipile, also known as a Herons engine, is a simple bladeless radial steam turbine which spins when the central water container is heated. Torque is produced by steam jets exiting the turbine, much like a tip jet1 or rocket engine. In the 1st century AD, Hero of Alexandria described the device in Roman Egypt, and many sources give him the credit for its invention. The aeolipile Heron described is considered to be the first recorded steam engine or reaction steam turbine. The name derived from the Greek word and Latin word pila translates to the ball of Aeolus, Aeolus being the Greek god of the air and wind. Pre dating Herons writings, a device called an aeolipile was described in the 1st century BC by Vitruvi in his treatise De architectura however, it is unclear if it is the same device or a predecessor, as he does not mention rotating parts. Description and physicsedit. A classroom model of an aeolipile. The aeolipile consists of a vessel, usually a simple solid of revolution, such as a sphere or a cylinder, arranged to rotate on its axis, having oppositely bent or curved nozzles projecting from it tipjets. When the vessel is pressurised with steam, steam is expelled through the nozzles, which generates thrust due to the rocket principle7 as a consequence of the 2nd and 3rd of Newtons laws of motion. When the nozzles, pointing in different directions, produce forces along different lines of action perpendicular to the axis of the bearings, the thrusts combine to result in a rotational moment mechanical couple, or torque, causing the vessel to spin about its axis. Aerodynamic drag and frictional forces in the bearings build up quickly with increasing rotational speed rpm and consume the accelerating torque, eventually cancelling it and achieving a steady state speed. Typically, and as Heron described the device, the water is heated in a simple boiler which forms part of a stand for the rotating vessel. Where this is the case, the boiler is connected to the rotating chamber by a pair of pipes that also serve as the pivots for the chamber. Alternatively the rotating chamber may itself serve as the boiler, and this arrangement greatly simplifies the pivotbearing arrangements, as they then do not need to pass steam. This can be seen in the illustration of a classroom model to the right. Historyedit. Illustration from Herons Pneumatica. Both Heron and Vitruvius draw on the much earlier work by Ctesibius 2. BC, Ctesibius or Ktesibios or Tesibius was an inventor and mathematician in Alexandria, Ptolemaic Egypt. He wrote the first treatises on the science of compressed air and its uses in pumps. Free Download Robot Chicken: Star Wars Episode II Cartoon more. Vitruviuss descriptioneditVitruvius c. BC c. 1. 5 AD mentions aeolipiles by name olipyl are hollow brazen vessels, which have an opening or mouth of small size, by means of which they can be filled with water. Prior to the water being heated over the fire, but little wind is emitted. As soon, however, as the water begins to boil, a violent wind issues forth. Herons descriptioneditHeron c. AD takes a more practical approach, in that he gives instructions how to make one 5. The Steam Engine. PLACE a cauldron over a fire a ball shall revolve on a pivot. A fire is lighted under a cauldron, A B, fig. C D with this the bent tube E F G communicates, the extremity of the tube being fitted into a hollow ball, H K. Opposite to the extremity G place a pivot, L M, resting on the lid C D and let the ball contain two bent pipes, communicating with it at the opposite extremities of a diameter, and bent in opposite directions, the bends being at right angles and across the lines F G, L M. As the cauldron gets hot it will be found that the steam, entering the ball through E F G, passes out through the bent tubes towards the lid, and causes the ball to revolve, as in the case of the dancing figures. U. S. Navy useeditIn recognition of the aeolipiles contribution to steam engineering, the U. S. Navy chose a semblance of the aeolipile for the Boiler Technician rating badge. Practical usageedit. A modern replica of Heros aeolipile. It is not known whether the aeolipile was put to any practical use in ancient times, and if it was seen as a pragmatic device, a whimsical novelty, a revered housel, or some other thing. Heros drawing shows a standalone device, and was presumably intended as a temple wonder, like many of the other devices described in Pneumaticaclarification needed. Vitruvius, on the other hand, mentions use of the aeolipile for demonstrating the physical properties of the weather. He describes the aeolipile asa scientific invention to discover a divine truth lurking in the laws of the heavens. After describing the devices construction see above he concludes Thus from this slight and very short experiment we may understand and judge the mighty and wonderful laws of the heavens and the nature of winds. See alsoeditReferenceseditjet engineNASA Glenn Learning Technologies Project LTP abc. Hero 1. 85. 1 reprint of 1st century CE original, Section 5. The Steam Engine, written at Alexandria, Pneumatica, London Taylor Walton and Maberly, retrieved 2. Translated from the original Greek by Bennet Woodcroft Professor of Machinery in University College London. Hero 1. Pneumatika, Book II, Chapter XI. Herons von Alexandria Druckwerke und Automatentheater in Greek and German. Wilhelm Schmidt translator. Leipzig B. G. Teubner. Encyclopdia Britannica. Encyclopdia Britannica Online. July 2. 00. 7 lt http www. De Architectura Chapter VI paragraph 2from Ten Books on Architecture by Vitruvius 1st century BC, published 1. June, 0. 8 1 accessed 2.