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Re: Gear Ratio Math?
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Posted by Alberta Mike on January 19, 2002 at 13:55:51 from (209.47.89.119):
In Reply to: Gear Ratio Math? posted by K-Mo on January 19, 2002 at 06:06:48:
I guess there are 10 different ways of looking at this. I used a percent change from one gear in a pair to the next gear in that pair. Does this following explanation make any sense? STANDARD: The 22:14 ratio gives you a 157% gearing "up" change (since 22 is 157% greater than 14). Now some guys will argue with this math, but taking 157% as 1.57 as a decimal, then 14 X 1.57 = 22 (approximately). This is followed by a 14:47 or 336% negative change for the next pair of gears which are gearing "down" (since 47 is 336% greater than 14). Net result is a 179% (336-157) gearing down change from start to finish for this set of 3 gears. HIGH: The 20:16 ratio gives you a 125% gearing up (higher) for the first set, followed by a 16:45 or 280% gearing down (lower) for the next set of gears. Net result is a 155% gearing down change from start to finish for this set of 3 gears. So, the standard gear set overall gears the tractor down 179% while the high gear set overall gears the tractor down only 155%. Thus, the high gear set gears down the tractor less (or is gearing it higher) and the tractor will travel faster while in the high range. Boy, hope I'm right on this after all that.
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