I think there's one in the Khyber pass from colonial times still operated by the local tourist agency or something. I actually like these because they still give that feel of early industrial era machines.
Yep picture series runs for a while here courtesy of
@ghazi52 :
https://defence.pk/pdf/threads/whatever.46703/page-5040#post-10989190
But its a far larger conventional loco for sure. My grandpa's older brother was a loco pilot (back in the 40s, 50s, 60s) for one of these more conventionally sized (YP series) locos:
Steam power runs in our family I suppose.
Btw are steam engines more environmentally friendly compared to diesel engine ones?
Nah Steam engines thermal efficiencies are low (basically 90%+ of the heat from the fuel is lost to the environment and not used as useful work...hence 90% of the pollutants are basically produced for no work).
So even if you use the cleanest washed, sorted coal possible (i.e not too much ash, soot that flies from carrying it around etc)...you wont extract the same amount of energy as a diesel engine (even one from say the 50s) can per amount of "pollutant" (whether you consider CO2 to be one...or just the other stuff).
This basic issue extends even when you replace the coal and make the steam engine oil/gas fired (i.e some cleaner fluid hydrocarbon)...because it uses a big boiler (that introduces water as the intermediate working fluid) compared to Diesel in an internal combustion engine (which basically converts the chemical energy of the fuel directly into motion, foregoing the need for a working fluid).
Basically the total efficiencies look like less than 10% for steam engine locomotive (often as low as 4 or 5%)...whereas more like 30 - 40% for diesel traction.
The best way to actually harness steam power is to use a turbine (rather than reciprocal piston mechanics that a steam locomotive uses)....but even that would pose problems at the size of a typical locomotive (generally you need to go lot larger to harness the efficiency well, hence steam turbines are generally found in power stations and large ships).
The good thing about turbines (rankine cycle) basically are (unlike a piston steam engine)...the working fluid is condensed/reused (so you don't have to waste all the energy in massively reheating fresh stock of it...not to mention having to replenish it all the time)....you can also get much higher boiler pressures as a result (good for useful work)...and overall since the system is more "closed" (and non reciprocating, which saves even more energy)...it can be insulated far better to prevent energy losses. But basically even with all of this, (hydrocarbon fired) steam turbines only become competitive with diesel engines at far larger sizes than found on locomotives. Coal (as a result) is basically much better off being used for static power plants (where you can put in large steam turbines) rather than prime movers like locomotives.
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