I have been reading a wonderful book tracing evolution of steam engines how various problems and tradeoffs were solved as engine sizes grew and demands for more horsepower and drawbar power.
Was curious if all things being equal (maybe same type wheel arrangement, simple or compound, cylinder sizes etc), is an oil fired engine easier to run than coal?
From what I read you had to spread the coal evenly on grate and watch drafting to avoid making holes in the coal bed, while an oil fire was just that without needing to spread the oil flame(??) The fireman had to shovel more/less coal or run stoker faster/slower, while I think the fireman just increased/decreased the oil valve. The tourist small engine I ran for awhile was oil fired and basically was "watch the gauge and open/close oil valve to keep pressure up".
From an armchair book reader.