Chassis dynamometers - roller size

Wednesday, February 16, 2011
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As a power unit engineer I must admit I still think in terms of engine dynos. In absorbing the power produced directly off the engine crankshaft - or, perhaps better still, a suitably designed PTO (Power Take Off) - this seems to me the easiest way t... read more
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The heat is on

Thursday, December 16, 2010
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One of the most difficult tasks for an experienced dyno engineer is to measure the amount of heat rejected to the engine coolant. On the face of it, fitting thermocouples - one in the engine water going in and another as it comes out and then measuri... read more
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Humidity - forget it?

Wednesday, November 10, 2010
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In my younger days, when fuel injection was but a luxury and the roads were less crowded, the journey to work was always so much more enjoyable in the foggy early morning light than at any other time. The engine in my transport - a high-compression '... read more
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The flywheel effect

Tuesday, September 28, 2010
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Now that kinetic energy recovery systems (KERS) are back on the agenda in Formula One and Le Mans prototypes, it's a reminder that a flywheel is not only a convenient place to attach the clutch, it can also be used to store energy. As well as electri... read more
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The control freak

Tuesday, August 17, 2010
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I'm sure we've all been accused of it at some time - the compulsive desire to have things just the way we want them, with little or no compromise. Perfection is the goal, anything else is a poor second best and, except in the case of pure genius perh... read more
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Corrective action

Friday, July 02, 2010
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The definition of an engine is apparently "a machine that converts power into motion". This may be true in its widest sense but when it comes to rotary outputs, I like things to be more precise. Far be it from me to contradict the Oxford English Dict... read more
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'Optimising' the gasoline engine?

Thursday, May 13, 2010
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Perhaps the most common word used today in engineering is 'optimise.' Now, my memory may be a little bit selective, but until about 20 years ago the word was rarely used. But I have a theory. In the past, engineers were probably far too busy concentr... read more
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Emission Testing in Motorsport

Tuesday, March 30, 2010
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Amid all the hype over the past few years of Global Warming or as it has been re-branded now, Climate Change, it won't surprise anyone that motorsport has come in for its own fair share of criticism. Viewed by some as a waste of resources, the sport ... read more
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The DPX

Tuesday, February 16, 2010
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The most common type of engine dynamometer today used by engine builders the world over, must be the eddy current machine. But few will ever forget, of those who ever used them, the DPX water brake. Made by Froude in Worcester, England since shortly ... read more
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The chassis dyno

Thursday, January 21, 2010
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Believe it or not measuring the precise output from a reciprocating engine has always been a controversial and sometimes, difficult task. Even in the confines of the engine test cell, day-to day repeatability can often be onerous not to say expensive... read more
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