Originally Posted by Patriot Services
I love antique iron. Those engines could even burn coal dust as a fuel.
Posted via Mobile Device
Actually it's a Hit-and-miss design and while it might run on an alternate fuel it also doesn't run long without maintenance.
The earlier designs required a mechanic ride along as the engine didn't have an oil sump so the mechanic had to spray oil on the valves as it ran, for obvious reasons valve covers were not used.
The smoke you see is from incomplete combustion, that's how inefficiently they ran.
This one gives a good idea as to some of the risks involved: