Dead centre (engineering) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-07-05

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Dead_centre_(engineering)


00:01:06 1 Bicycles
00:01:41 2 Reciprocating engine
00:04:50 3 Steam engines
00:06:07 4 Other machines
00:06:37 5 See also



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Speaking Rate: 0.9590029662387511
Voice name: en-US-Wavenet-B


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SUMMARY
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In a reciprocating engine, the dead centre is the position of a piston in which it is either farthest from, or nearest to, the crankshaft. The former is known as  top dead centre (TDC) while the latter is known as bottom dead centre (BDC).More generally, the dead centre is any position of a crank where the applied force is straight along its axis, meaning no turning force can be applied.  Many sorts of machines are crank driven, including unicycles, bicycles, tricycles, various types of machine presses, gasoline engines, diesel engines, steam locomotives, and other steam engines. Crank-driven machines rely on the energy stored in a flywheel to overcome the dead centre, or are designed, in the case of multi-cylinder engines, so that dead centres can never exist on all cranks at the same time.  A steam locomotive is an example of the latter, the connecting rods being arranged such that the dead centre for each cylinder occurs out of phase with the other one (or more) cylinders.