What is the purpose of idler wheels on a tank?

The purpose of idler wheels on a tank is to support the track and maintain its tension. Idler wheels are located at the front or rear of the tank's track system and are typically larger in diameter compared to the other road wheels.

The main function of idler wheels is to guide the track and create tension by applying pressure to the track links. This tension helps to prevent slack in the track, which is important for maintaining proper track alignment and reducing the risk of derailment.

Additionally, idler wheels also help to distribute the weight of the tank evenly across the track, improving traction and reducing wear on the track components. They act as a point of contact between the track and the ground, allowing the tank to move smoothly over various terrains.

In terms of scale modelling, idler wheels are an important detail to consider when building tank models. They can be accurately represented using aftermarket parts or by scratch-building them using suitable materials. Paying attention to the correct placement and alignment of idler wheels can greatly enhance the overall realism of a tank model.