Engine Boiler pressure for a Railroad Steam engine rose as horse power increases increased and engines were refined.. The use of Super-Heated Steam revolutionized the steam engine and brought in the age of "Super Power" or steam engines. 1890's era steam engines were operated at around 125 PSI. C&O eventually increased that to 250-265#. Penn used 300# in their most modern steam engines. There were some experimental steam engines that used 450# (or more), using the steam twice (Compound). Steam Farm tractors (as far as I have ever heard) used AROUND 125# and few (if any) ever had super-heaters. Where steam Farm tractors may have approached 100 Horse Power ( Boiler HP), Railroad Steam Locomotives were built to produce as much as 7,000 Boiler HP and 6,000+ Cylinder (Drawbar-Horsepower). The two are as far from "Apples and Oranges" as you can get.. A Large, Modern Steam Locomotive would have up to 125 SQ FT of Grate area and under Full Power, require 100 lbs (coal) per Sq Ft an hour.. Or 12,500 lbs of Fuel/Hour..and if it needed MORE power, it could be "Over-Fired", causing a lot of smoke, but boiling even more water to make MORE steam.. A pound of coal would bring approx. 7# of water to 300 PSI so, the above steam engine would use 87,500 # of Water/Hour.. Not quite like a Steam tractor's appetite.. The NYC Niagara's boiler was made with 4" Flues, to allow it to be "Over-Fired" (if need be), drawing the fire right into the Flues.!!
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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