Trackaxle performance based dollies
The Trackaxle axle front steer dolly has front axle rotating on a ball-race and an A frame pull rotating on an independent and offset ballrace, these two rotating assembles are interconnected via a steer link. Note that when the A frame has rotated through 3.64deg the front axle rotates through 6.01deg.
This gives a steer ratio of 1.8 : 1, increasing tyre life, improving rearward amplification and Improving yaw dampening making for a safer more stable vehicle combination.
With these improvements the Trackaxle front steer dolly allows a very cost effective means of achieving HML weights under the level 2B 30 Metre protocol for 4.3 metre container trailers.
This front steer dolly has been designed to improve the stability of an A-double carrying bulk coal. It has been shown to reduce the high speed transient off tracking to much safer levels so that the vehicle can operate at higher mass limits.