Employment[edit]The Renault UE was employed at the start of World War II by the French Army, and was subsequently pressed into German Army service, as well as being used in limited numbers by Free France and Romanian forces.
French use
The chenillette was mainly allocated to the standard Infantry Regiments, the first on 10 September 1932. There were six chenillettes present in the Compagnie Hors Rang (the company not subordinated to any battalion, and serving as the regimental supply, maintenance and replacement unit) and three in the Compagnie Régimentaire d'Engins, the regimental heavy weapons support company. Their primary official function was that of a supply vehicle to provide frontline positions with ammunition and other necessities while under artillery fire. The light armour was sufficient to stop small shell fragments and rifle or machine-gun fire at ranges greater than 300 meters. The Renault UE could carry or tow approximately 1000 kg of supplies; this included 350 kg in the cargo bin and 600 kg in the trailer. Typical loads included 81 mm Brandt mortar ammunition, ammunition for the 25 mm Hotchkiss anti-tank gun or rifle and machine-gun ammunition. To indicate they were towing, the tractors would erect a small rectangular steel plaque on the roof showing a yellow triangle on a contrasting blue field. The remainder of the vehicle was normally painted a dull bronze green overall, not using the intricate three- or four-colour schemes typical of French armour of the time. The more exposed forward positions would be supplied by the tractors only; their bins, though small, could still hold a load of 150 25 mm rounds or 2,688 machine-gun rounds. Mortar and gun teams were expected to move their own weapons if the move was less than 1,000 meters, otherwise, they were loaded, two each, in UEs for longer movements; likewise four machine-guns would be loaded. The 25 mm gun could optionally be towed. As the tractors were too small to accommodate the weapon crews, these had to move behind, following the vehicles on foot; the piece commander during this procedure sat next to the chenillette driver to indicate the desired new position of his mortar or gun. This was in fact the only occasion that within the Infantry Regiments a second crew member was really present: the driver normally formed the entire crew, although an assistant driver was allocated. A chenillette was thus never permanently attached to an individual weapon system; each 25 mm gun e.g. had its own horse-team to pull it for normal transport. For longer distance moves, the chenillette would be normally loaded on a truck, with the Renault UK trailer and (on good roads) possible mortars or guns towed behind. The larger trailer was officially never part of such a tow; it was in short supply, with just one available for four tractors each (two in each regiment) and only used to remove these if they had broken down. In practice it was not uncommon to transport the smaller trailer on the truck, while using the larger to move the tractor, as the prescribed procedure lowered the convoy speed to 15 km/h.
In the Mechanised Infantry Divisions Renault UE strength was much higher however. Their Compagnies Divisionnaires Antichar had twelve chenillettes, one for each 25 mm gun — and in this case each individual gun had its own tractor. In their CREs six Renault UEs were present, again one allocated to each 25 mm gun; and their battalions had in their Compagnies d'Accompagnement two Renault UEs to serve their organic two Brandt mortars and two 25 mm guns. The Mechanised Infantry Regiments thus had eighteen chenillettes each, the MIDs in total 66. These are the official standard numbers; actual strengths (and uses) varied, also dependent on the replacement of the 25 mm gun by the 47 mm Brandt that was considered too heavy to be towed by a chenillette. In total the French Army had an organic strength of about 2500 Renault UEs; as the number of vehicles produced became after September 1939 much higher, Modèle 31s, mostly completely worn out, were gradually phased out. These older vehicles were sometimes unofficially appropriated by engineer and artillery units. Depot strength on 10 May was 1278.
Being in principle an unarmed vehicle, the Renault UE was allowed to be employed by Vichy France. The type served in various conflicts involving the French colonies, used both by the government forces and the Free French. In May 1943, there was an attempt by the Free French to add the British Ordnance QF 6 pounder anti-tank gun, mounted on the rear of the vehicle with a gun shield. The relative size of the gun and the vehicle meant that it had to be operated from rear, as there was no room for the crew to operate it in the vehicle. After disappointing trial runs, the prototype was reverted to its original role as an artillery tractor.[1] After D-Day some vehicles were used by the French irregular and regular forces in France. After the war some units for a few years still made use of the type. Some vehicles were taken into use by the army of Syria.
Projects
One of the six Renault UE prototypes had a rubber track; in 1932 this line of development was taken further by rebuilding a vehicle into the Renault UE Neige ("snow") or Renault UE N. For better traction this type had a more robust suspension with a broader rubber track, powered by a stronger six-cylinder engine.
In the mid-thirties Chaubeyre produced the prototype of a smoke-laying vehicle, the generator using a thousand litres tank placed on a Renault UK trailer. The system was to be controlled from the commanders position of the main vehicle.
After the larger orders had been made in 1937, both AMX and the Renault design bureau, that had not been nationalised, tried to introduce further modifications to improve the production series. Several of these would indeed be incorporated into the UE 2 production run, but these were of a minor nature; there were however much more fundamental changes proposed, aimed at solving the structural suspension problems, that were the reason Berliet and Fouga still tried to obtain approval of their chenillette projects, even after a choice had been made for the Renault UE2: they hoped that eventually the Renault UE would be abandoned altogether. To be able to present immediate alternatives, should the occasion arise, AMX and Renault developed stronger suspension systems.
In February 1938 Renault presented stronger tracks and more resistant road wheels, with an improved device to keep the axles waterproof, to the Commission de Vincennes. These were tested from 12 February until 6 July and again from 21 September until 21 November.
In July 1938 a prototype of a lengthened chenillette was presented by Renault. It had a fourth bogie in the suspension to reduce track pressure and a third return wheel. To save weight and better dampen shocks the number of leaves in the leaf springs was reduced from six to three. The tracks were obviously longer too, with 156 instead of 131 links. The bin was also "longer" at 72 centimetres, but less "wide" with 123 cm. Internally a new centrifugal ventilator type was fitted. The total length increased to 335 cm, the weight to 3.67 metric tons. Trials took place between 13 July 1938 and 8 February 1939, during which the vehicle was again modified. The top speed without trailer transpired to be reduced to 32.7 km/h; unsurprisingly the trench crossing ability was improved to 160 cm. As the air outlets had been placed higher, the wading capacity was improved to 45 cm. However, the main purpose: ameliorating suspension reliability, was not really achieved. Tracks were still thrown, track guides bent, springs broke and entire bogies were sheared off, just as with the series model.
On 22 November 1938 AMX presented its new track fitted only to the right side of a trials vehicle so that direct comparisons could be made with the old track type. After 1500 kilometres the normal track was completely worn out and the AMX track was now fitted to a second vehicle; after testing had resumed on 9 January 1939 only after 3700 km on 21 March the new track was worn. The commission concluded that the new type was clearly superior in durability, but that this was caused by the use of chrome steel that made it 70% more expensive, too pricy for the French Army.
On 27 September 1939 AMX presented its new suspension system. It resembled that of the Renault R35, with two bogies, horizontal springs — be it here of the oil type — and five road wheels per side. The prototype also had a new Chausson radiator and more comfortable suspended crew seats. The new type however was not tested immediately; only after also Renault had presented another prototype, this time with seven road wheels — an extra wheel having been inserted in the space created by moving the bogie assembly twenty centimetres backward — both types were simultaneously compared between 7 and 23 February 1940. It was shown that the AMX suspension, though much sturdier, had a negative influence on the performance: speed and range fell with about 15%, mostly due to an incorrect weight distribution. The new seats, though clearly adding to crew comfort, were too high, preventing a soldier of normal length from closing the hood. However the new Renault suspension offered no clear advantages over the older model in terms of vibration level and crew fatigue, so both models were in the end rejected as possible modification projects of existing vehicles; AMX's type on 11 April 1940 was judged not to be acceptable for future production.
French use
The chenillette was mainly allocated to the standard Infantry Regiments, the first on 10 September 1932. There were six chenillettes present in the Compagnie Hors Rang (the company not subordinated to any battalion, and serving as the regimental supply, maintenance and replacement unit) and three in the Compagnie Régimentaire d'Engins, the regimental heavy weapons support company. Their primary official function was that of a supply vehicle to provide frontline positions with ammunition and other necessities while under artillery fire. The light armour was sufficient to stop small shell fragments and rifle or machine-gun fire at ranges greater than 300 meters. The Renault UE could carry or tow approximately 1000 kg of supplies; this included 350 kg in the cargo bin and 600 kg in the trailer. Typical loads included 81 mm Brandt mortar ammunition, ammunition for the 25 mm Hotchkiss anti-tank gun or rifle and machine-gun ammunition. To indicate they were towing, the tractors would erect a small rectangular steel plaque on the roof showing a yellow triangle on a contrasting blue field. The remainder of the vehicle was normally painted a dull bronze green overall, not using the intricate three- or four-colour schemes typical of French armour of the time. The more exposed forward positions would be supplied by the tractors only; their bins, though small, could still hold a load of 150 25 mm rounds or 2,688 machine-gun rounds. Mortar and gun teams were expected to move their own weapons if the move was less than 1,000 meters, otherwise, they were loaded, two each, in UEs for longer movements; likewise four machine-guns would be loaded. The 25 mm gun could optionally be towed. As the tractors were too small to accommodate the weapon crews, these had to move behind, following the vehicles on foot; the piece commander during this procedure sat next to the chenillette driver to indicate the desired new position of his mortar or gun. This was in fact the only occasion that within the Infantry Regiments a second crew member was really present: the driver normally formed the entire crew, although an assistant driver was allocated. A chenillette was thus never permanently attached to an individual weapon system; each 25 mm gun e.g. had its own horse-team to pull it for normal transport. For longer distance moves, the chenillette would be normally loaded on a truck, with the Renault UK trailer and (on good roads) possible mortars or guns towed behind. The larger trailer was officially never part of such a tow; it was in short supply, with just one available for four tractors each (two in each regiment) and only used to remove these if they had broken down. In practice it was not uncommon to transport the smaller trailer on the truck, while using the larger to move the tractor, as the prescribed procedure lowered the convoy speed to 15 km/h.
In the Mechanised Infantry Divisions Renault UE strength was much higher however. Their Compagnies Divisionnaires Antichar had twelve chenillettes, one for each 25 mm gun — and in this case each individual gun had its own tractor. In their CREs six Renault UEs were present, again one allocated to each 25 mm gun; and their battalions had in their Compagnies d'Accompagnement two Renault UEs to serve their organic two Brandt mortars and two 25 mm guns. The Mechanised Infantry Regiments thus had eighteen chenillettes each, the MIDs in total 66. These are the official standard numbers; actual strengths (and uses) varied, also dependent on the replacement of the 25 mm gun by the 47 mm Brandt that was considered too heavy to be towed by a chenillette. In total the French Army had an organic strength of about 2500 Renault UEs; as the number of vehicles produced became after September 1939 much higher, Modèle 31s, mostly completely worn out, were gradually phased out. These older vehicles were sometimes unofficially appropriated by engineer and artillery units. Depot strength on 10 May was 1278.
Being in principle an unarmed vehicle, the Renault UE was allowed to be employed by Vichy France. The type served in various conflicts involving the French colonies, used both by the government forces and the Free French. In May 1943, there was an attempt by the Free French to add the British Ordnance QF 6 pounder anti-tank gun, mounted on the rear of the vehicle with a gun shield. The relative size of the gun and the vehicle meant that it had to be operated from rear, as there was no room for the crew to operate it in the vehicle. After disappointing trial runs, the prototype was reverted to its original role as an artillery tractor.[1] After D-Day some vehicles were used by the French irregular and regular forces in France. After the war some units for a few years still made use of the type. Some vehicles were taken into use by the army of Syria.
Projects
One of the six Renault UE prototypes had a rubber track; in 1932 this line of development was taken further by rebuilding a vehicle into the Renault UE Neige ("snow") or Renault UE N. For better traction this type had a more robust suspension with a broader rubber track, powered by a stronger six-cylinder engine.
In the mid-thirties Chaubeyre produced the prototype of a smoke-laying vehicle, the generator using a thousand litres tank placed on a Renault UK trailer. The system was to be controlled from the commanders position of the main vehicle.
After the larger orders had been made in 1937, both AMX and the Renault design bureau, that had not been nationalised, tried to introduce further modifications to improve the production series. Several of these would indeed be incorporated into the UE 2 production run, but these were of a minor nature; there were however much more fundamental changes proposed, aimed at solving the structural suspension problems, that were the reason Berliet and Fouga still tried to obtain approval of their chenillette projects, even after a choice had been made for the Renault UE2: they hoped that eventually the Renault UE would be abandoned altogether. To be able to present immediate alternatives, should the occasion arise, AMX and Renault developed stronger suspension systems.
In February 1938 Renault presented stronger tracks and more resistant road wheels, with an improved device to keep the axles waterproof, to the Commission de Vincennes. These were tested from 12 February until 6 July and again from 21 September until 21 November.
In July 1938 a prototype of a lengthened chenillette was presented by Renault. It had a fourth bogie in the suspension to reduce track pressure and a third return wheel. To save weight and better dampen shocks the number of leaves in the leaf springs was reduced from six to three. The tracks were obviously longer too, with 156 instead of 131 links. The bin was also "longer" at 72 centimetres, but less "wide" with 123 cm. Internally a new centrifugal ventilator type was fitted. The total length increased to 335 cm, the weight to 3.67 metric tons. Trials took place between 13 July 1938 and 8 February 1939, during which the vehicle was again modified. The top speed without trailer transpired to be reduced to 32.7 km/h; unsurprisingly the trench crossing ability was improved to 160 cm. As the air outlets had been placed higher, the wading capacity was improved to 45 cm. However, the main purpose: ameliorating suspension reliability, was not really achieved. Tracks were still thrown, track guides bent, springs broke and entire bogies were sheared off, just as with the series model.
On 22 November 1938 AMX presented its new track fitted only to the right side of a trials vehicle so that direct comparisons could be made with the old track type. After 1500 kilometres the normal track was completely worn out and the AMX track was now fitted to a second vehicle; after testing had resumed on 9 January 1939 only after 3700 km on 21 March the new track was worn. The commission concluded that the new type was clearly superior in durability, but that this was caused by the use of chrome steel that made it 70% more expensive, too pricy for the French Army.
On 27 September 1939 AMX presented its new suspension system. It resembled that of the Renault R35, with two bogies, horizontal springs — be it here of the oil type — and five road wheels per side. The prototype also had a new Chausson radiator and more comfortable suspended crew seats. The new type however was not tested immediately; only after also Renault had presented another prototype, this time with seven road wheels — an extra wheel having been inserted in the space created by moving the bogie assembly twenty centimetres backward — both types were simultaneously compared between 7 and 23 February 1940. It was shown that the AMX suspension, though much sturdier, had a negative influence on the performance: speed and range fell with about 15%, mostly due to an incorrect weight distribution. The new seats, though clearly adding to crew comfort, were too high, preventing a soldier of normal length from closing the hood. However the new Renault suspension offered no clear advantages over the older model in terms of vibration level and crew fatigue, so both models were in the end rejected as possible modification projects of existing vehicles; AMX's type on 11 April 1940 was judged not to be acceptable for future production.