I would like to see that, in an unlimited bracket. I'm not even sure they use a sled that would be heavy enough to stop it. There is a video on youtube of it pulling a 44 bottom breaking plow, to the beams, in well compacted soil, like it was nothing.
The amount of time taken for the power stroke to occur is insanely long compared to any conventional ice. The ability of steam to continue to expand throughout the power stroke is insane compared to any hydrocarbon/oxygen mixture in a combustion chamber. The gearing is so short it’s almost going backward! This means that torque is not measured in pounds feet, but in tons miles.
With cutoff set to 0 that thing sees full boiler pressure for the entire stroke. The louder it chuffs the less cutoff is in play. Inefficient, but powerful. It has two power strokes per cylinder per revolution, as it's a double acting engine. And if it's a twin cylinder with the crankpins phased 90º apart it cannot stall out because there is ALWAYS a power stroke in play. These things just don't know what it means to run out of torque.
not the first time this units been ran through the sled pull. think ive seen 5 videos alike with different time stamps. safe to say shes still runnin stronger than most american diesals