The cross catch bars adjust themselves to the direction of the line of pull in the drawbar.
These latter turn horizontally on a central pivot attached to the jaw end of the drawbar.
Note that there is no drawbar and that the coupler is merely bolted to the beams.
A shackle and links hang from the end of the drawbar for attachment to ordinary wagons.
The cranking of the drawbar allows for the deflection of the buffer springs.
A chart whereby you can find the tractive power or drawbar pull of any locomotive without making a figure.