Weeden #14s are truly great old engines, offering fair power, they can also be adjusted to run about as slow as any steam engine that I know.
They have a rather powerful burner, that seems surprisingly scarce in the wild, with which care should be always used because of all the lead alloy parts typically found on these engines. I have one that even has a fair chunk melted out of the flywheel by some portion of misguided flame!