Drawbar Pull (Towing) Digramm

The diagram shows a typical tow tractor which has a nominal towing capacity of 6 tonnes i.e. rated DBP 1200 N.

The example shown above illustrates:

a tractor towing a	2 tonne load
operating on a slope of	8 %
maximum travelling speed obtainable	5 km/h
permissible length of run per hour	1200 m

(where the 8 % slope is 60 m long, the complete cycle, including the return journey, can be performed 10 times per hour).

Load/gradient combinations shown by full line can be restarted from stationary on the gradient.

The permissible haul per hour is the total distance travelled, including the return journey and any downhill gradients.

It is recommended that braked trailers are used for trailer loads exceeding 2.5 tonne and for all trailer loads where a gradient is involved.