How much can you tow with a steam vehicle and still have the ability to turn? We are working with very early steam engines, so multiple pistons are not fancied, but accepted. Size is of no mater unless you go very overboard, I do not want to drive the Titanic afterall (also I am pretty sure it wasn't steam powered) I am looking for something that
can turn tightly considering size
can be powered with primitive fuels
Does not need special driveways, has to be able to fell some trees on its way and cross ditches (this implies a tank, but I'm not going to mandate it).
Can stay on as long as supplied fuel (closed steam cycle, other fluids can be used for cooling.)
With all above requirements how much power can such machine exert on trailer at highest possible in earth-like enviroment?