What's the purpose of this exhibition? One might as well try pulling a D2 Caterpillar with an Indy race car. It's a demonstration of traction, and heavier will always win, regardless of power.
It's true that the steam engine has an edge at very low speed because that's where it has maximum torque. But I'm sure that drag tractor is capable of putting out much more torque to its wheels than the steamer, it just can't hold it.
You'll notice that the drag tractor is careful to keep his wheels spinning. If he just stopped and held his brakes, the engine would have a much harder time pulling him.
The comparison made between this demononstration and a aircraft carrier catapult is silly. The catapult can accelerate an aircraft weighing several tons from zero to 100 mph in only a second or two. That's serious horsepower. The steam engine, in comparison, is putting out only a few horsepower as it drags the tractor backwards.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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