Gene Heskett wrote: > On Saturday 06 March 2010, Ed Greshko wrote: > >> Les wrote: >> >>> Do you know that the car has a differential or what that does? The car >>> would not work without it, but it is not part of the knowledge you need >>> to drive the car. But you do need to realize that the wheels rotate one >>> way on one side and the opposite on the other and that they run at >>> slightly different speeds, if you are going to race. That small bit of >>> knowledge along with other similar bits would make you the exception on >>> the course and give you an advantage. It is the same with computers. >>> >> I hate to mention this...but I wouldn't want to have you as my >> mechanic. :-) >> >> The wheels of a car *do not* rotate one way on one side and the opposite >> on the other. You have simply changed your frame of reference. Roll a >> bicycle forward. Standing on one side of the bike, the wheels are >> rotating clockwise. Stand on the other, they are rotating >> counterclockwise. >> >> A car would work without a differential in much the same way a wagon or >> cart would. However, when cornering the tires would need to rotate at >> different speeds. This would tend to cause slipping on one side and >> dragging on the other and lead to control problems as well as damage to >> the tires. >> > > Differentials are optional in real racing. And get less and less important > to the vehicles handling as the speeds increase and the corners tighten. > In oval dirt track racing, a welded diff is usually good for at least a 3 > second quicker lap. > > You'd better tell that to the folks at McLaren or the folks at Xilinx http://www.iloveindia.com/cars/sports-cars/mclaren-f1.html has them using a LSD and I don't think it is "acid". and http://me.queensu.ca/courses/MECH452/readings/documents/reference13.pdf seems even more complex.... -- There is brutality and there is honesty. There is no such thing as brutal honesty.
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