Churchill III equipped with the Petard, a 290 mm Spigot mortar, throwing the 40 lb (18 kg) 'Flying dustbin' with its 28 pound high explosive warhead. The petard was reloaded by traversing the turret to the co-driver's hatch. The co-driver then breaks down open the petard barrel and pushes the petard round into the barrel and then closes it. The co-driver's hands are briefly exposed during the process. The AVRE was designed after the Canadian defeat at Dieppe, and could also be equipped with numerous other attachments, such as mine flails, fascine rollers, explosive placers etc.