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Tractor Talk Discussion Board

Re: No, not true . . .


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Posted by MarkB_MI on October 21, 2010 at 03:04:04 from (166.203.42.166):

In Reply to: Re: No, not true . . . posted by jdemaris on October 20, 2010 at 17:50:39:

JD, there's no such thing as an engineering decision that isn't a compromise. Sure, you can run this particular engine slower than 3000 rpm and get better specific fuel consumption. The chart says so. But then the genset builder would have had to derate the generator, since less horsepower is on tap at the lower speed. To get the same horsepower at the lower speed would require going to a bigger engine, which adds both weight and cost.

Taking your argument to its extreme, we should still be running Fairbanks-Morse generator sets from the 1920s, since they are very slow, reliable and efficient. But you can't put one in the back of your pickup and you can't buy one at Home Depot for 500 bucks.


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