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Rumely 120 Steam Tractor making 3,050 Ft-Lbs Torque on dyno

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Uploaded by on Sep 3, 2007

120 HP Rumely steam tractor power test on Prony Brake. This tractor can produce over 3,000 ft-lbs of torque between 0 and 250 RPM.
Filmed at the Western Minnesota Steam Thresher's Reunion steam show in Rollag, MN USA on 9/1/2007. For more info on this show, go to rollag.com.

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  • Learn to fire one of these engines then come back here and you'll understand why the comment was funny. 100 pounds is low for that engine. The Prony brake operator was chastising the fireman for being at such a low pressure.

  • SWEET VID! Now this just goes to show how much power these old machines had. And for it to break the belt at the end. Priceless.

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All Comments (25)

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  • id like to know who dislikes this! how can you?

  • @waterloofreak And the guy on the engine, is my Uncle! Another fantastic guy!

  • @waterloofreak Bill is a personal friend of mine! He's a great guy!

  • @phtmexplo Oops wrong formula, here is the right one :

    HP = torque x rpm : 5252

  • HP = torque x5252

    so high torque and low HP (like this video) is good for continous "work"

    but if u have low torque but high HP its good also, its better for car topspeed for example.

  • the anouncer bill mccreery was my steam school instructer

  • @12valvepower1 ...has nothing to do with steam.

  • @Zsword92 Actually its torque alone. Horsepower is just math.

  • Yes, you can still buy new ones too.

  • It's actually both.

    They both accelerate the car. The torque more at low rpm's and the power more at high rpm's.

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