The fact remains that the 4040 and 4020 cost almost twice for fuel per hour as the D. They do not do twice as much work as the D, when it comes to plowing. (Obviously, they do for hay and other higher speed operations.) If you're dumping twice as much money into something, it must do twice as much work to be equally economical. The big diesels are pulling 5 bottoms, the D is pulling 3. They would need to pull 6 bottoms to have the same economy. Where's the hole in this math that I'm not seeing?
Not sure how anyone can logically disagree with that.
A tandem D would be fun, but then I'd be burning twice as much fuel and would be as bad as a 4040. (I had to toss that in! Ha ha!)
You know, I had no intention to make this thread about economy. I really wanted to know what is done to a D to give it more power and how much it can do. I don't know how we got off on this tangent, though it's been fun.
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