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capability <strong>of</strong> the haulouts. A shunt prime mover could be either a fast tractor or an 8x8 truck prime<br />
mover.<br />
It appears that bins will be the surge buffer at landings, similar in principle to the multi-lift bins used<br />
in the NSW sugar industry (Figure 3.1). The multi-lift bins are ideal where single trailer trucks must<br />
be employed and road transport distances are relatively short. However multi-trailer trucks lose<br />
efficiency due to increased terminal time where they must be loaded and unloaded over the rear <strong>of</strong> the<br />
trailers as the road trains have to be separated and reassembled both at the loading and unloading<br />
stages.<br />
3.2.2 Capacity<br />
Sugar System<br />
For side tipper and elevating tippers, there are various vehicle sizes from a nominal 8 tonne to<br />
nominal 14 tonne capacity. Most units are <strong>of</strong> local manufacture and unique in design and thus vary<br />
between regions, with the configuration usually depending on the transport system to the mill<br />
(rail/road). The physical size <strong>of</strong> haulouts is governed by overall height (3.5m) and width restrictions<br />
(2.5m). Width is a critical road dimension continuous operation <strong>of</strong> over-width cane haulout vehicles<br />
<strong>of</strong> public roads is not permitted. Hence, the actual dimensions will vary depending on height from the<br />
ground (tracks, high floatation tyres etc).<br />
Table 3.2 provides data on typical dimensions and capacities <strong>of</strong> various sugarcane haulout vehicles.<br />
Table 3.2 Examples <strong>of</strong> sugarcane haulout capacity<br />
Manufacturer Bin Dimensions Volume Nominal<br />
Capacity<br />
Length Width Height<br />
m m m m 3 t<br />
Tractor Trailer 3.8 2.3 2.4 21 8<br />
Tractor Trailer 3.5 2.4 2.7 23 9<br />
Aust<strong>of</strong>t Powerhaul 4.8 2.3 2.7 27 10<br />
Tractor Trailer 4.3 2.4 2.7 28 12<br />
Self-Propelled 6.4 2.3 2.5 36 14<br />
Robotham et al. (2001) obtained various data from a range <strong>of</strong> sugarcane haulout vehicles. They<br />
developed a simple load index to help quantify the efficiency <strong>of</strong> the haulout vehicles as load carrying<br />
machines. This load index was defined as vehicle payload divided by gross vehicle mass. An<br />
efficient haulage vehicle would have a load index <strong>of</strong> 0.5 or greater whilst an inefficient haulage<br />
vehicle would present figures <strong>of</strong> around the 0.2. Figure 3.7 illustrates the best and worst gross mass<br />
carried compared with load and tare weights for sugarcane haulout vehicles.<br />
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