28hp Minneapolis Steam Traction Engine on Prony Brake

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This video was taken April 14, 2019 at the Somerset, VA Steam School. The 28hp Minneapolis Threshing Machine Co. engine is being operated by owner Brad Kelley. The engine is designed to operate at 250 RPM and you can see the governor being adjusted in the clip. It was producing about 110hp on the belt but as you can hear in the clip the belt was slipping a little. The engine is belted to a Prony Brake which is a simple device invented by Gaspard de Prony in 1821 to measure the torque produced by an engine. The term "brake horsepower" is one measurement of power derived from this method of measuring torque.

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15 апр 2019

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Комментарии : 6

@davehughes2424 Год назад

You've done a good job with this engine from what I can hear. Well done.

@raybin6873 2 года назад

Amazing that belt stays on....

@wdobni 2 года назад

great video....i would very much have liked to have lived in the era of steam power.....its interesting that the video label says 28 hp engine but the engine was putting out 110 hp

@HeavyMetalEngines 2 года назад

Back then these traction engines were rated in nominal horsepower (NHP) or drawbar horsepower to give an idea of the plowing power of the engine. The 110hp stated is coming directly off the engine's crankshaft belted to a Prony Brake to give a brake horsepower (BHP) rating. Later on the tractors would be given two numbers to show the NHP and a second higher number for the BHP such as a Case 28/80. Hopefully that explains it a little better.

@TheSteamAndGasShowsAndMore 2 года назад

The show was on a not so good day lots of clouds in Virginia that year

@harrybobb6764 2 года назад

I'd would have been kept shoveling more coal in that until That smoke trunks more and more black even I'd throw in two half of a old chunks of car tires or rubber in that along with the coal