trailing arms suspension with shock absorbers
Trailing arms are used in more advanced suspension systems, where each road wheel is located on the end of an arm and supported againt the weight of the vehicle by a shock absorber (or another elastic element), as shown in Figure 16-22. As most tracked vehicles than their longer variants.
Trailing arm suspensions are sensitive to the direction of the track is rotation, and tracks always rotate more freely in one direction than the reverse. The arm are located in front of the road wheel.
There are a number of possible variants for this suspension system, depending on how much load each road wheel has to handle, how much space you can use, and what suspension travel and hardness you want to achieve. Figures 16-22 though 16-24 show some common variations.