Plot Comments This Unit was equipped with a central tire inflation system (CTIS). This is a good example of high and low pressure tires. The load on the soil is reduce for the 6 inch depth when the tire pressure is reduced. The load at the 12 inch and 20 inch depth is not reduced by […]
This combine is a good example of a bias tire versus a VF radial tire. For both sensor locations 1 and 2, the bias ply tire (E11_L_1 and E11_L_2) exerted a higher force on the soil than the VF tire (E11_R_1 and E11_R_2). The rear tires in both test were measured approximately the same giving good […]
Plot Comments This unit is a good example of a combine set up. The IF and VF tires are allowing for a much lower tire pressure than one might normally expect on a combine. Overall the small footprint of these tires may mean that the stress is not as small as one would expect with a low tire […]
Plot Comments This combine with tracks was tested on the second installation only. The plot titled E9_2 was measured down the center of the track face, between the sets of rollers. The plot titled E9_offset_2 was the same track aligned with the outside set of rollers over the center. There stress in at the 6 inch depth is increased under […]
Plot Comments The combination is a tracked grain cart with a similar weight to Unit E7. The track unit on this machine appears much better suited to carrying this amount of weigh. The configuration would be substantially safer that a single tire for carrying this amount of weight. The outside dual on the tractor was almost in […]
Plot Comments This vehicle has the same radial tire that was seen on Unit E6. The plot E7_1 shows the left side and an overall larger response due in part to a more wet soil profile. The plot E7_2 shows the left side again with a similar response to the same tire on Unit E6 The soil pressure […]
Plot Comments Similar results to other CTIS systems. Comparing the high pressure tires to the low pressure tires shows reduction of stress at 6 and 12 inches. The heavy weight still creates high stress at 20 inches regardless of pressure. […]
Plot Comments This unit compares two common tires for a grain cart a 30.5L-32 bias tire and a much wider 900/60 R 32 radial. The bias tire is associated with the plots titled E6_L_1 and E6_L_2. The bias tire had a higher inflation pressure with approximately the same load. Plots named E6_L_1 and E6_R_1 had some issues […]
Plot Comments This vehicle compared high inflation pressure and low inflation pressure for the grain cart. Notice also the high inflation tire was ~3000 lbs. heavier. Notice the last peak on the plots is slightly higher for the plots names E5_1 and E5_2. Also notice the much higher overall response for the plots for the […]
Plot Comments This unit tested the grain cart tracks the first two plots were aligned over the center of the track face which shows a lower soil pressure. The second two plots show the pressure under the outside third of the track face, directly under the track rollers. These plots did not record the track of the tractor since […]
Plot Comments This is an example of the variation in soil stress across the face of the Tire tread. The plots where the vehicle was off center show a higher soil stress directly under the rollers of the track unit. When comparing this unit with E47 you would expect and similar profile with a slightly lower soil pressure […]
Plot Comments The lower tire pressure reduced the stress at the 6 and 12 inch depths effectively. The weight of the vehicle means that the stress at the 20 inch depth is not as effectively reduced by lowering the tire pressure. Lowering the axle weight would reduce the stress at the 20 inch depth. The […]
