An atomic loco ? That`s a new one on me ! In response to Roscobb , Steam coal is a totally different animal to house coal or power station coal and of higher calorific value . Soft Welsh Steam Coal was regarded as some of the best and I always found it really good but needed a different style of firing by the fireman than hard coal because it needs longer to burn efficiently with a strong exhaust blast through the chimney to draw primary air through the firebox grate via the flue tubes within the boiler . So a fireman needed skill to get the best out of it . Efficient burning of the gases created by the burning off coal increases the calorific value of coal by about 33% per ton of coal . At about 3000 degrees F the Nitrogen , Oxygen , Carbon and Sulphur given off will be burnt to create this massive increase in heat production thus leaving only ash as a residue . So when you see photos of locos making impressive columns of black smoke they have just had fresh coal shovelled in and not reached maximum efficiency . Or just simply a bad inexperienced fireman ! A light grey haze off the chimney is what you aim for .
There were flirtations with various other fuels like oil . This was introduced in the UK towards end of WW2 and the severe winter of 1947 due to national shortages of good quality coal . The plus side with oil was an average increase of 4000 BTU per ton compared to coal , had less waste , was cleaner and reduced the gradual clogging up of flue tubes . However , when the railways were nationalised in 1948 the price of oil was rocketing ( nothing new there

) and the idea dropped with the 93 locos converted to oil reverted to coal burning .
One steam turbine loco was built in 1935 on marine propulsion principles but it was high maintenance and was converted back to a conventional loco. A gas turbine loco called GT3 was built in 1961 by oddly enough , the English Electric Company and trialed on BR but that didn`t catch on either !
The following photos taken leaving Crewe Station and and returning from Glasgow Central Station would give the Greenies heart failure ! Carbon footprint ? What carbon footprint ? ?? I am on the second of the two locos .
See also the Turbomotive and GT3 .



