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Y-Shaped Blastpipes (Eductors) for 1890-1920 Industrial Locomotives?

Y-Shaped Blastpipes (Eductors) for 1890-1920 Industrial Locomotives?

Y-Shaped Blastpipes (Eductors) for 1890-1920 Industrial Locomotives?

I have found a number of castings (and their wooden patterns for the sand castings) in the Glover Locomotive section of the Southern Museum at Kennesaw GA. These castings are not identified in the museum displays, but are Y-shaped hollow tubes: 2 inlets, joining to make one outlet. Each casting (and its associated pattern) vary in height and diameter (since Glover made several different sizes of their yard and industrial locomotives between 1890 and 1925) but range from 22 inches tall x 2 inch inside diameter up to 30 inches tall and 3 inches diameter.

It is my opinion that these castings are the blast pipes for the industrial (small) locomotives that Glover made, but had not sold when they went out of business in the mid-1920′s. The exhaust steam from each of the two engine cylinders passed back through the engine valve during the exhaust half of the piston cycle, then entered the blastpipe, blew into smokebox in front of the boiler. This entrained the hot gasses coming out of the firetubes under the waterjacket boiler and (literally) blew the hot gasses and remaining exhaust steam out of the stack. This action pulled more combustion air into the firebox at the other end (the "sold end) of the boiler and increased draft and efficiency.

How could I verify this for the museum staff?


(Photo's will be posted when available.)

RE: Y-Shaped Blastpipes (Eductors) for 1890-1920 Industrial Locomotives?

Yes, I saw those images on-line last night as well.

These are a straight-leg "Y" shape: which would probably work adequately for the small power, low speed engines being built. (18 inch to 30 inch driver wheels) ....

Will get to the museum tomorrow and post the photo's.

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