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| Revisión de 15:44 26 jul 2014 | Última revisión de 09:34 31 oct 2014 1 revisión | |||
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| '''The FCM 21 prototype''' was the lightest prototype was at 15.64 tonnes. It resembled a scaled-down Char 2C, the giant tank produced by the same company. It was very elongated with a length of 6.5 metres and width of 205 centimetres. A rather large riveted turret with a stroboscopic cupola, adopted from the Char 2C, brought its height to 252 centimetres. Like the superheavy tank it had no real spring system for the twelve small wheels per side. Separate clutches for each snake track allowed to horizontally point the 75 mm howitzer in the middle of the hull. It used the same Panhard engine as the FAHM type and its speed was the lowest of all at 17.4 km/h. However, five hundred litre reservoirs allowed for the best range at 175 kilometres. | '''The FCM 21 prototype''' was the lightest prototype was at 15.64 tonnes. It resembled a scaled-down Char 2C, the giant tank produced by the same company. It was very elongated with a length of 6.5 metres and width of 205 centimetres. A rather large riveted turret with a stroboscopic cupola, adopted from the Char 2C, brought its height to 252 centimetres. Like the superheavy tank it had no real spring system for the twelve small wheels per side. Separate clutches for each snake track allowed to horizontally point the 75 mm howitzer in the middle of the hull. It used the same Panhard engine as the FAHM type and its speed was the lowest of all at 17.4 km/h. However, five hundred litre reservoirs allowed for the best range at 175 kilometres. | |||
| ? | + | == Slow development progress == | ||
| ? | == | + | ||
| March 1925 Estienne decided to base the future production type on the SRB, as regarded the general form and mechanical parts. However, it would be fitted with the 75 mm gun, a Holt-track to be developed by FCM, which company had completed a special research programme aimed at optimising weight distribution, and the FAMH-suspension (later this would again be discarded). Estienne also had some special desires: a track tension wheel should be fitted, adjustable from the inside, and a small gangway from the fighting room should improve the accessibility of the engine compartment. Furthermore the front armour should be increased to 40 millimetres. In November 1925 Renault was given the order to build a wooden mock-up, that was finished early 1926. On 27 January 1926 it was decided to build three prototypes of what was provisionally called a Tracteur 30, a final design by engineer Alleaume of the Schneider company, cooperating with the STCC (Section Technique des Chars de Combat). The first was to be delivered by Renault, the other two by FCM and FAHM respectively. The same year the Direction de l'Infanterie in the Plan 1926 redefined the concept of a Char de Bataille. There would be a greater emphasis on infantry support, implying that the antitank-capacity was secondary and no armour increase was necessary. The weight was to be limited to 22 metric tonnes and the speed might be as low as 15 km/h. However, a radio set would have to be fitted to better direct and coordinate its actions; therefore a fourth crew-member was needed. On 18 March 1927 the contracts for the three prototypes were signed. The hull of first Renault vehicle, made of softer boiler plate instead of armour steel to simplify changes, was in January 1929 finished apart from the armament. It was delivered in March. The separately produced cast turret was delivered on 23 April. The howitzer could only be fitted in April 1930. This prototype was allotted the series number N° 101. N° 102, the production of which FAMH had shifted to Renault, was delivered soon after; in September 1930 FCM delivered N° 103, constructed by the Atelier de Mépanti at Marseille. One of the vehicles was fitted with an alternative 75 mm Schneider gun instead of the 75 mm St Chamond M 21 from FAMH. | March 1925 Estienne decided to base the future production type on the SRB, as regarded the general form and mechanical parts. However, it would be fitted with the 75 mm gun, a Holt-track to be developed by FCM, which company had completed a special research programme aimed at optimising weight distribution, and the FAMH-suspension (later this would again be discarded). Estienne also had some special desires: a track tension wheel should be fitted, adjustable from the inside, and a small gangway from the fighting room should improve the accessibility of the engine compartment. Furthermore the front armour should be increased to 40 millimetres. In November 1925 Renault was given the order to build a wooden mock-up, that was finished early 1926. On 27 January 1926 it was decided to build three prototypes of what was provisionally called a Tracteur 30, a final design by engineer Alleaume of the Schneider company, cooperating with the STCC (Section Technique des Chars de Combat). The first was to be delivered by Renault, the other two by FCM and FAHM respectively. The same year the Direction de l'Infanterie in the Plan 1926 redefined the concept of a Char de Bataille. There would be a greater emphasis on infantry support, implying that the antitank-capacity was secondary and no armour increase was necessary. The weight was to be limited to 22 metric tonnes and the speed might be as low as 15 km/h. However, a radio set would have to be fitted to better direct and coordinate its actions; therefore a fourth crew-member was needed. On 18 March 1927 the contracts for the three prototypes were signed. The hull of first Renault vehicle, made of softer boiler plate instead of armour steel to simplify changes, was in January 1929 finished apart from the armament. It was delivered in March. The separately produced cast turret was delivered on 23 April. The howitzer could only be fitted in April 1930. This prototype was allotted the series number N° 101. N° 102, the production of which FAMH had shifted to Renault, was delivered soon after; in September 1930 FCM delivered N° 103, constructed by the Atelier de Mépanti at Marseille. One of the vehicles was fitted with an alternative 75 mm Schneider gun instead of the 75 mm St Chamond M 21 from FAMH. | |||
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| The three vehicles were not only used for technological but also tactical experimentations. Together with the Char D1 pre-series they represented the only modern tanks in France and the Army was naturally very interested in what lessons could be learned from them about future warfare, outlining the concept of a Char de Manoeuvre. Neither Char de Bataille nor Char de Manoeuvre are official type designations; they refer to the tactical concepts only.. In October 1931 a small unit was formed, the Détachement d' Experimentation in which the prototypes were united from December, using the Camp de Châlons as a base to see how they could be used in winter conditions. Afterwards they on their own power drove to the Atelier de Rueil for repairs. In September they participated in the Champagne summer manoeuvres as a Détachement Mécanique de Combat; from 4 May 1933 N° 102 en 103 together formed a Détachement d'Engins Blindés to perform tactical experiments in the army bases of Coëtquidan and Mourmelon as part of a motorised light division, followed by comparable experiments in April 1934 at Sissonne. Technical aspects were not forgotten during these tests and it was established they could attain an average road speed of 19 km/h, cross a trench 2,4 metres wide and wade through a 105 centimetres deep stream. The prototypes were again extensively altered to meet changes in specifications. On 6 April 1934 the first order was made for seven tanks of a Char B1. The "B1" refers to the fact that there were other simultaneous projects to develop improved types: the Char B2, B3 and B B. | The three vehicles were not only used for technological but also tactical experimentations. Together with the Char D1 pre-series they represented the only modern tanks in France and the Army was naturally very interested in what lessons could be learned from them about future warfare, outlining the concept of a Char de Manoeuvre. Neither Char de Bataille nor Char de Manoeuvre are official type designations; they refer to the tactical concepts only.. In October 1931 a small unit was formed, the Détachement d' Experimentation in which the prototypes were united from December, using the Camp de Châlons as a base to see how they could be used in winter conditions. Afterwards they on their own power drove to the Atelier de Rueil for repairs. In September they participated in the Champagne summer manoeuvres as a Détachement Mécanique de Combat; from 4 May 1933 N° 102 en 103 together formed a Détachement d'Engins Blindés to perform tactical experiments in the army bases of Coëtquidan and Mourmelon as part of a motorised light division, followed by comparable experiments in April 1934 at Sissonne. Technical aspects were not forgotten during these tests and it was established they could attain an average road speed of 19 km/h, cross a trench 2,4 metres wide and wade through a 105 centimetres deep stream. The prototypes were again extensively altered to meet changes in specifications. On 6 April 1934 the first order was made for seven tanks of a Char B1. The "B1" refers to the fact that there were other simultaneous projects to develop improved types: the Char B2, B3 and B B. | |||
| ? | ||||
| == Production == | == Production == | |||
| The Char B1 was manufactured by several firms: Renault (182), AMX (47), FCM (72), FAMH (70) and Schneider (32). Although it was the main producer, Renault had not exclusively designed the tank. Therefore the official name was not Renault B1 as often erroneously given. It was a very expensive tank to build: the per unit cost was about 1.5 million French francs. In France at the time two schools of thought collided: the first wanted to build very strong heavy tanks, the other a lot of cheap light tanks. Both sides managed to influence procurement policy to the end that not enough tanks were built of either category, to the exasperation of men like Colonel Charles de Gaulle who wanted to build more of the medium Char D2, with a third of the cost of the Char B1 bis, but armed with the same 47 mm gun. | The Char B1 was manufactured by several firms: Renault (182), AMX (47), FCM (72), FAMH (70) and Schneider (32). Although it was the main producer, Renault had not exclusively designed the tank. Therefore the official name was not Renault B1 as often erroneously given. It was a very expensive tank to build: the per unit cost was about 1.5 million French francs. In France at the time two schools of thought collided: the first wanted to build very strong heavy tanks, the other a lot of cheap light tanks. Both sides managed to influence procurement policy to the end that not enough tanks were built of either category, to the exasperation of men like Colonel Charles de Gaulle who wanted to build more of the medium Char D2, with a third of the cost of the Char B1 bis, but armed with the same 47 mm gun. | |||
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| == Post WWI heritage == | == Post WWI heritage == | |||
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| The French favoured small turrets despite their shortcomings, as they allowed for much smaller and thus cheaper vehicles. Although the French expenditure on tanks was relatively larger than the German, France simply lacked the production capacity to build a sufficient number of heavier tanks. The Char B1 was expensive enough as it was, eating up half of the infantry tank budget. | The French favoured small turrets despite their shortcomings, as they allowed for much smaller and thus cheaper vehicles. Although the French expenditure on tanks was relatively larger than the German, France simply lacked the production capacity to build a sufficient number of heavier tanks. The Char B1 was expensive enough as it was, eating up half of the infantry tank budget. | |||
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| ==Variants== | ==Variants== | |||
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| The original Char B1 had frontal and side armour up to 40 mm thick. The vehicle had a fully traversing APX1 turret with a 47 mm L/27.6 SA 34 gun. This had a poor anti-tank capability: the thirty APHE (Armour Piercing High Explosive) rounds among the fifty the tank carried had a maximum penetration of about 25 mm. In addition, it was armed with a 75 mm ABS 1929 SA 35 gun mounted in the right-hand side of the hull front and two 7.5 mm Châtellerault M 1931 machine guns: one in the hull and the other in the turret. The 75 mm L/17.1 gun, that could fire both a HE and the APHE Obus de rupture Modèle 1910M round, had a limited traverse of only one degree to the left or the right (equating to about 18 metres at 500 m range). It was laid onto target by the driver (provided with the gun sight) through the Naeder hydraulic precision transmission. The traverse had only been made possible in order to precisely align the gun barrel with the sight beforehand. The 75 mm gun had its own loader—the remaining two crew members were the radio operator and the commander, who had to load, aim and fire the 47 mm gun while commanding the vehicle (as noted before, in the case of platoon leaders, command other vehicles as well). The fighting compartment had the radio set on the left and an exit hatch in the right side. All vehicles had the ER53 radio telegraphy set, which used Morse Code only, which proved not to be the best solution in combat. A hatch in the rear bulkhead gave access to a corridor (under which nineteen 75 mm rounds out of a total of eighty were stowed) in the engine room to the right of the engine, which was officially rated at 250 hp (190 kW), but had an actual output of 272 hp (203 kW). Each tank had its own team of three mechanics; in battle some of these might join the regular crew. | The original Char B1 had frontal and side armour up to 40 mm thick. The vehicle had a fully traversing APX1 turret with a 47 mm L/27.6 SA 34 gun. This had a poor anti-tank capability: the thirty APHE (Armour Piercing High Explosive) rounds among the fifty the tank carried had a maximum penetration of about 25 mm. In addition, it was armed with a 75 mm ABS 1929 SA 35 gun mounted in the right-hand side of the hull front and two 7.5 mm Châtellerault M 1931 machine guns: one in the hull and the other in the turret. The 75 mm L/17.1 gun, that could fire both a HE and the APHE Obus de rupture Modèle 1910M round, had a limited traverse of only one degree to the left or the right (equating to about 18 metres at 500 m range). It was laid onto target by the driver (provided with the gun sight) through the Naeder hydraulic precision transmission. The traverse had only been made possible in order to precisely align the gun barrel with the sight beforehand. The 75 mm gun had its own loader—the remaining two crew members were the radio operator and the commander, who had to load, aim and fire the 47 mm gun while commanding the vehicle (as noted before, in the case of platoon leaders, command other vehicles as well). The fighting compartment had the radio set on the left and an exit hatch in the right side. All vehicles had the ER53 radio telegraphy set, which used Morse Code only, which proved not to be the best solution in combat. A hatch in the rear bulkhead gave access to a corridor (under which nineteen 75 mm rounds out of a total of eighty were stowed) in the engine room to the right of the engine, which was officially rated at 250 hp (190 kW), but had an actual output of 272 hp (203 kW). Each tank had its own team of three mechanics; in battle some of these might join the regular crew. | |||
| The suspension was very complex with sixteen road wheels per side. There were three large central bogies, sprung by a vertical coil spring. Each central bogie carried two smaller ones. The three vertical springs moved through holes in a horizontal beam, to both extreme ends of which road wheels were attached by means of leaf springs: three at the front and one at the back. The high track run gave the tank an old fashioned look, reflecting its long development time. It had a maximum speed of 28 km/h and a weight of 28 metric tons. The range was about 200 km. A total of 34 vehicles were built from December 1935 until July 1937. They had series numbers 102 to 135. Chassis number 101 was kept apart to build the Char B1 ter prototype. | The suspension was very complex with sixteen road wheels per side. There were three large central bogies, sprung by a vertical coil spring. Each central bogie carried two smaller ones. The three vertical springs moved through holes in a horizontal beam, to both extreme ends of which road wheels were attached by means of leaf springs: three at the front and one at the back. The high track run gave the tank an old fashioned look, reflecting its long development time. It had a maximum speed of 28 km/h and a weight of 28 metric tons. The range was about 200 km. A total of 34 vehicles were built from December 1935 until July 1937. They had series numbers 102 to 135. Chassis number 101 was kept apart to build the Char B1 ter prototype. | |||
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| '''Char B1 bis''' | '''Char B1 bis''' | |||
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| The Char B1 bis was an upgraded variant with thicker armour at 60 mm maximum (55 mm at the sides) and an APX4 turret with a longer-barrelled (L/32) 47 mm SA 35 gun, to give the tank a real anti-tank capacity. It was the main production type: from 8 April 1937 until June 1940 369 units were delivered out of a total order for 1144, with series numbers 201 to 569. Before the war manufacture was slow: only 129 had been delivered on 1 September 1939. The monthly delivery was still not more than fifteen in December; it peaked in March 1940 with 45 units. The Char B1 bis had a top speed of 25 km/h (16 mph) provided by a 307 bhp (229 kW) petrol engine. The first batch of 35 Char B1 bis used the original engine butfrom 1938 to May 1940 they were slowly re-equipped. Its weight was about 31.5 metric tons. The operational range was about 180 km which was similar to other tanks of the period. At 20 km/h the three fuel tanks (total capacity of 400) would be exhausted in six hours. To improve matters, at first, trailers with an 800 litre auxiliary fuel tank were towed but this practice was soon abandoned. Instead Char B1 units included a large number of fuel trucks and TRC Lorraine 37 L armoured tracked refuelling vehicles specially designed to quickly refuel them. The last tanks to be produced in June had an extra internal 170 l (37 imp gal) fuel tank. To cool the more powerful engine the Char B1 bis had the air intake on the left side enlarged. It is often claimed this formed a weak spot in the armour, based on a single incident on 16 May near Stonne where two German 37 mm PAK guns claimed to have knocked out three Char B1's by firing at the intakes at close range. The air intake was a 6-inch (150 mm) thick assembly of horizontal slits alternately angled upwards and downwards between 28 mm thick armour plates, and as such intended to be no more vulnerable than the normal 55 mm side plates. | The Char B1 bis was an upgraded variant with thicker armour at 60 mm maximum (55 mm at the sides) and an APX4 turret with a longer-barrelled (L/32) 47 mm SA 35 gun, to give the tank a real anti-tank capacity. It was the main production type: from 8 April 1937 until June 1940 369 units were delivered out of a total order for 1144, with series numbers 201 to 569. Before the war manufacture was slow: only 129 had been delivered on 1 September 1939. The monthly delivery was still not more than fifteen in December; it peaked in March 1940 with 45 units. The Char B1 bis had a top speed of 25 km/h (16 mph) provided by a 307 bhp (229 kW) petrol engine. The first batch of 35 Char B1 bis used the original engine butfrom 1938 to May 1940 they were slowly re-equipped. Its weight was about 31.5 metric tons. The operational range was about 180 km which was similar to other tanks of the period. At 20 km/h the three fuel tanks (total capacity of 400) would be exhausted in six hours. To improve matters, at first, trailers with an 800 litre auxiliary fuel tank were towed but this practice was soon abandoned. Instead Char B1 units included a large number of fuel trucks and TRC Lorraine 37 L armoured tracked refuelling vehicles specially designed to quickly refuel them. The last tanks to be produced in June had an extra internal 170 l (37 imp gal) fuel tank. To cool the more powerful engine the Char B1 bis had the air intake on the left side enlarged. It is often claimed this formed a weak spot in the armour, based on a single incident on 16 May near Stonne where two German 37 mm PAK guns claimed to have knocked out three Char B1's by firing at the intakes at close range. The air intake was a 6-inch (150 mm) thick assembly of horizontal slits alternately angled upwards and downwards between 28 mm thick armour plates, and as such intended to be no more vulnerable than the normal 55 mm side plates. | |||
| Over the production run the type was slowly improved. Tanks number 306 to 340 carried 62 47-mm rounds (and the old complement of 4,800 machine gun rounds); later tanks 72 and 5,250. However the B1 bis had fewer 75 mm rounds compared to the earlier B1 : 74 instead of eighty, normally only seven of which were APHE ammunition. Early in 1940 another change was made when the ER53 radio was replaced by the ER51 which allowed spoken wireless communication. The company and battalion command tanks also had an ER55 for communication with higher command. The crews of the 1re DCR kept their old sets however, preferring them because the human voice was drowned by engine noise. | Over the production run the type was slowly improved. Tanks number 306 to 340 carried 62 47-mm rounds (and the old complement of 4,800 machine gun rounds); later tanks 72 and 5,250. However the B1 bis had fewer 75 mm rounds compared to the earlier B1 : 74 instead of eighty, normally only seven of which were APHE ammunition. Early in 1940 another change was made when the ER53 radio was replaced by the ER51 which allowed spoken wireless communication. The company and battalion command tanks also had an ER55 for communication with higher command. The crews of the 1re DCR kept their old sets however, preferring them because the human voice was drowned by engine noise. | |||
| ? | ||||
| '''Char B1 ter''' | '''Char B1 ter''' | |||
| The Char B1 ter, with sloped and welded 70 mm armour, a weight of 36.6 metric tons and an engine of 350 hp (260 kW) was meant to replace the B1 bis to accelerate mass production from the summer of 1940. Cost was reduced by omitting the complex Neader transmission and giving the hull gun a traverse of ten degrees instead. Only two prototypes could be finished before the defeat of France. In May 1940 it was agreed to deliver nine Char B1's each month to Britain in exchange for a monthly British production of the "H 39". | The Char B1 ter, with sloped and welded 70 mm armour, a weight of 36.6 metric tons and an engine of 350 hp (260 kW) was meant to replace the B1 bis to accelerate mass production from the summer of 1940. Cost was reduced by omitting the complex Neader transmission and giving the hull gun a traverse of ten degrees instead. Only two prototypes could be finished before the defeat of France. In May 1940 it was agreed to deliver nine Char B1's each month to Britain in exchange for a monthly British production of the "H 39". | |||
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| ==Operational history== | ==Operational history== | |||
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| ? | == | + | == Surviving vehicles == | |
| + | ||||
| Today eleven vehicles survive, one Char B1 and ten Char B1 bis. | Today eleven vehicles survive, one Char B1 and ten Char B1 bis. | |||
| The last surviving Char B1 can be seen at the "Association pour la Sauvegarde du Patrimoine Historique et Militaire" (ASPHM), near Strasbourg, in France. It was previously at the Fort de Seclin. It is in a bad condition, with parts like the main gun missing. It was salvaged from a firing range, but will be restored by the owner. A total of ten Char B1 bis tanks can be seen in various places in Great Britain and in France. | The last surviving Char B1 can be seen at the "Association pour la Sauvegarde du Patrimoine Historique et Militaire" (ASPHM), near Strasbourg, in France. It was previously at the Fort de Seclin. It is in a bad condition, with parts like the main gun missing. It was salvaged from a firing range, but will be restored by the owner. A total of ten Char B1 bis tanks can be seen in various places in Great Britain and in France. | |||
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