Abstract: An articulated crawler track comprises track links having forward and rear edges and a width dimension extending transverse to the longitudinal dimension of the track and at least two drag links provided between the forward edge of each track link and the rear edge of the adjacent track link, each drag link being articulated to each of the respective track links for movement about parallel axes which are transverse to the longitudinal dimension of the track, the drag links being spaced apart along the width dimension of the track links and being arranged within the effective width of the track links.

Abstract: A suspension system for a tracked vehicle has a hull provided with double crawler tracks positioned on either side of the hull. Each crawler track runs around a track drive wheel, track roller assemblies and a take-up idler. A torsion unit assembly connects each track roller assembly to the hull. The torsion unit assembly includes a plurality of torsion units mechanically connected in series, with the torsion unit at one end of the series being fixed to the hull and the torsion unit at the other end of the series being connected to and suspending the respective track roller assembly in order to obtain a large amount of suspension travel for the track roller.