In the first sub-test the specific fuel consumptions shown in Figure 4 were measured with an approximately constant traction requirement of 70 kN. This implies that according to the work done under the test conditions the fuel requirement of the Vredestein tyre was clearly better in comparison with the reference products. Compared with the IF technology this is certainly not surprising. However, the measurements showed that even with similar ones, namely in comparison with another VF tyre an additional improvement was achieved.
Based on the boundary conditions of the reference attachments, which were taken as a basis for the tractor settings, in this case a cultivator with known work width and depth, the area in hectares worked per hour was calculated. The results are shown in Figure 5.
The differences in the specific fuel consumption also become clear here. The work output of the Traxion Optimall on a similar area is approximately 7 % faster than of the third placed. The advantage to the second placed VF candidate still is 1.5 %. The resulting work speeds influenced this result as a consequence of the varying slip conditions.
Based on the area efficiency, as shown in Figure 6, a comparison of the absolute fuel consumption/fuel consumption related to land usage can be performed. The total result also reflects the advantage for the Vredestein tyre.
The economic added value becomes even clearer under consideration of the costs based on two main factors, fuel and driver. Of course, the relevant area size and a long-term observation have to be carried out.