tested on AMR 33 prototype N° 79758; the first had the idler resting on the ground; the second two bogies and five road wheels, like the R 35. This Renault ZB was rejected, but in March 1936 twelve were ordered by China and four a few months later by the Yunnan province administration. The latter were delivered in October 1938, the former only in 1940. The third suspension type had only one bogie per side and was accepted. The Renault factory designation of the vehicle with the relocated engine and new suspension was Renault ZT; it merely indicates the chronological order of Renault's military prototypes and has no further meaning. The new suspension was first tested on a third prototype, in September 1934 newly built from boiler plate; its idler wheel was still of the AMR 33 suspension type and its turret was that of the second prototype. Description The production vehicles would differ slightly from the third prototype: they had more riveted, instead of bolted, plates and used the Renault 447 engine. The AMR 35 was somewhat larger than the AMR 33, being 3.84 metres long, 1.76 metres wide and 1.88 metres tall. It weighed, fully loaded, 6.5 metric tonnes (six tonnes unloaded). The vertical armour plates had a thickness of thirteen millimetres, the sloped plates being nine millimetres thick and the top and bottom plates six millimetres. Its general configuration was changed in that the engine was moved to the back. Originally it had been intended to give the driver a more central position to improve his view to the right but eventually he remained at the left side of the hull, the right side being occupied by a large ventilation grill. The turret, where the second crew member, the commander/gunner, was located, was also placed left of centre. Two types of turret were used: the Modèle réglementaire AVIS-1 fitted with the 7,5 mm Modèle 1931 Type C machine-gun and an ammunition stock of 2250 rounds and the AVIS-2 with a 13,2 mm machine-gun. The 7.5 mm version also had a reserve machine-gun that can be placed on a small mount on top of the turret for AA use. If a radio was present it was the ER 29, operated by the commander. The suspension used four much more robust road wheels. The two in the middle were paired into a central bogie, sprung by a horizontal rubber