Hello All,
[#welcome] to the forums.
Your first few posts will be moderated so they will be some delay in viewing them.
No, it was an either-or situation.
I primarily run diesels but I do have two (2) steamers; a USRA 0-6-0 with a Vanderbilt tender and a 0-6-0 Side Tank Porter, both converted to burn oil.
The Vanderbilt tenders coal bunker was retrofitted to haul the oil.
Vanderbilt tenders were manufactured in different sizes.
For short hauls, a smaller four-axle tender was used while for longer hauls, and bigger engines, a larger six-axle version would be used.
Because of the tight 15-, and 18-inch curves on my pike the smaller, four-axle version is used.
I don’t know if it’s true to scale but my four-axle tender measures 26-feet from footboard to footboard.
For longer hauls, I have a second four-axle tender that can be added on.
On the Bachmann 0-6-0 Side Tank Porter, just behind the cab is a space for the fuel of choice.
A coal load is modeled in this space and a cover plate with an oil filler is provided- -so you can model it for either coal or oil.
Side Tank Porters were used for switching in ports- -hence the name.
As has been noted…
This was true for fuel; coal or oil, as well.
On my pike, it is used as a helper up the 3% grade. Then it is backed down and topped off for the next run.
Again, never far from a fuel oil and water source.
Hope this helps.