Montpelier Tests

| May/June 1956

President, National Threshers Assn.

I AM GIVING YOU THE results of the economy tests made at Montpelier, Ohio, at the threshers reunion last June. They do not show up as good as the average of those made at Winnipeg, Manitoba in 1913 and a few years earlier, or the tests of some Baker uniflow engines at Ohio State University. The Baker engines were developing one horse-power hour on 24 lbs. of water with saturated steam, & 1 horse-power hour on 20 lbs. of water with their front end super heater. However, the White steamer auto engine developed an horse-power hour on slightly less than 12 pounds of water, with high pressure superheated steam in their cross-compound engine.

At Montpelier we used a good grade of soft coal and at Winnipeg they used hard coal, that had about 20% more heating value and no sooting of tubes and firebox. It must be remembered that all engines at Winnipeg were new ones, and operated by the best engineers the manufacturer could find as competition was very keen. Our contest was a friendly one and we plan to make a number of tests at the reunion this June 28, 29 and 30, 1956.

Statistics show the 110 hp. Case (12' by 12' cyl.) at Winnipeg in 1912 developed 144.22 hp. with 160 lbs. working pressure, and 135.2 hp. in 1913 with 147 lbs. W. P. on the one-half hour maximum run. That same year the big 35-115 hp. (12' by 14' cyl.) Sawyer-Massey engine developed 153.8 hp. with 158 lbs. average steam pressure.

It will be noted that the big 100 hp. Case was the gold medal winner at Winnipeg for using the least fuel and water per hp. hour. I am sure this engine was using the geared pump to feed the boiler which saves 6 to 8% of the fuel. No doubt the firebox was equipped with a brick arch also.

A close runner-up was a 25-80 Case Woolf compound in 1913 and I doubt if the Case Company had their geared pump on this size at this time.