Tanks of Czechoslovakia Information

This article deals with the history of tanks employed by military forces in Czechoslovakia from the interwar period, and the more conventional tanks designed for the Czech Army before World War II, and the tanks that ended up as Panzers of the German Wehrmacht during World War II, or in the use of other countries who purchased them before the war began.

The first armored tanks and vehicles in Czechoslovakia were like most countries based on others designs and eventually evolved into their own tank designs. The Czech Army bought three Carden Loyd tankettes and a production license for them in 1930, Českomoravská Kolben-Daněk building four copies that same year as prototypes for future orders. The Carden Loyds were evaluated during the Fall maneuvers and revealed numerous problems: the crews had very poor vision through the narrow slits, the machine gun had a very narrow field of fire, and the crewmen had a difficult time communicating. Furthermore, they were slow, underpowered and often broke down. One of the P-1 prototypes was rebuilt to address these issues with additional vision ports in all directions, internal ammunition storage and the machine guns field of fire increased to 60°. It was extensively tested during 1931—2 and a few other changes were made as a result. The armor was increased from 6 to 8 mm (0.24 to 0.31 in) and from 9 to 12 mm (0.35 to 0.47 in) and a fixed machine gun was added for the driver. Two of the other prototypes were rebuilt to the same standard; all three were officially accepted by the Army on 17 October 1933. The other prototype was eventually given to the Shah of Iran. The order for seventy was placed on 19 April 1933, all being delivered by October 1934.

After the first World War, Slovakia and the regions of Bohemia, Moravia, Silesia and Carpathian Ruthenia formed a common state, Czechoslovakia, with the borders confirmed by the Treaty of Saint Germain and Treaty of Trianon. In 1919, during the chaos following the breakup of Austria-Hungary, Czechoslovakia was formed with numerous Germans and Hungarians within the newly set borders. A Slovak patriot Milan Rastislav Štefánik (1880–1919), who helped organize Czechoslovak regiments against Austria-Hungary during the First World War, died in a plane crash. In the peace following the World War, Czechoslovakia emerged as a sovereign European state. It provided what were at the time rather extensive rights to its minorities and remained the only democracy in this part of Europe in the interwar period.

During the Interwar period, democratic Czechoslovakia was allied with France, and also with Romania and Yugoslavia (Little Entente); however, the Locarno Treaties of 1925 left East European security open. Both Czechs and Slovaks enjoyed a period of relative prosperity. There was progress not only in the development of the countrys economy, but also in culture and educational opportunities. The German minority came to accept their role in the new country and relations with Austria were good. Yet the Great Depression caused a sharp economic downturn, followed by political disruption and insecurity in Europe.

Thereafter, Czechoslovakia came under continuous pressure from the revisionist governments of Germany and Hungary. Eventually, this led to the Munich Agreement of September 1938, which allowed Nazi Germany to partially dismember the country by occupying what was called the Sudetenland, a region with a German-speaking majority bordering Germany and Austria. The Germans seized a large amount of the Czechoslovakian designed tanks and armored vehicles when they occupied Bohemia-Moravia in March 1939. The remainder of "rump" Czechoslovakia was renamed Czecho-Slovakia and included a greater degree of Slovak political autonomy.

After the Munich Agreement and its Vienna Award, Nazi Germany threatened to annex part of Slovakia and allow the remaining regions to be partitioned by Hungary or Poland unless independence was declared. Thus, Slovakia seceded from Czecho-Slovakia in March 1939 and allied itself, as demanded by Germany, with Hitlers coalition. The government of the First Slovak Republic, led by Jozef Tiso and Vojtech Tuka, was strongly influenced by Germany and gradually became a puppet regime in many respects.

After it became clear that the Soviet Red Army was going to push the Nazis out of eastern and central Europe, an anti-Nazi resistance movement launched a fierce armed insurrection, known as the Slovak National Uprising, near the end of summer 1944. A bloody German occupation and a guerilla war followed. The territory of Slovakia was liberated by Soviet and Romanian forces by the end of April 1945.

After World War I, the Polish army began designing tankettes, light tanks, and armored vehicles, many by Škoda. The German engineer Joseph Vollmer joined Škoda and designed a wheel/track light tank, the KH-50 (Kolo-Housenka). This design had roadwheels mounted on the drive sprockets and jockey wheels behind them to support the tracks. During World War I, Vollmer was chief designer for the German War Departments motor vehicle section, and he had designed the World War I German tanks A7V, K-Wagen, LK I and LK II. Despite the design for the KH-50 (Kolo-Housenka) having impressive specifications for the period - 13 mm armour, 37 mm turret-mounted armament, and a 50 hp engine capable of driving the tank at 8 miles per hour (13 km/h) (on tracks) and 22 miles per hour (35 km/h) (on wheels) - it was rejected by the Czech army.

The army was, however, impressed by the hybrid wheel/track concept and commissioned further studies, which resulted in the KH-60 (1928–29) and the KH-70 (1930). In these two designs the engine power was increased to 60 hp and 70 hp respectively and a better system was developed for switching between track and wheel use which allowed a change in less than 10 minutes.

Two KH-50 prototypes were built, one of which was later converted to a KH-60; the other was scrapped. Actual production included two KH-60s to the USSR and a KH-70 to Italy. The wheel-on-track concept was finally abandoned in 1934. The Škoda T-21 (original designation was Škoda Š-IIc) was Škoda’s contribution to the IIc army category (medium tanks for general use) and a direct competitor to the Praga V-8-H.

Basically, what happened: in the early thirties, both Praga and Škoda (main competitors for the Czechoslovak army contracts, but also when it came to export) had several unsuccessful designs when it came to infantry support tanks. While the light tanks (LT-35 and the later LT-38) were generally good, they just couldn’t get infantry support right. The unsuccessful attempts where the Praga P-IIb and Škoda Š-IIb. After that, both companies basically sat together and made a joint infantry tank project, designated ŠP-IIb. It was unsuccessful for various reasons, mostly because neither company was that eager to cooperate with their main competitor. Also, both companies worked on their own private attempts to build IIb/IIc category prototypes. These private attempts would later become the Praga V-8-H and the Škoda T-21.

The main design works on the T-21 began as early as September 1936. The first prototype was finished in May 1937 – and so began the long journey of this vehicle and its versions and derivates, that ended only after the war.

The first variant from May 1937 was the original Š-IIc. It was supposed to be fitted with a new engine, built especially for it by the automobile factory branch of Škoda in Mladá Boleslav, but the engine development got delayed and the prototype was (in order to save time) fitted with a 190 hp 13-liter V6, originally intended for the Š-III breakthrough tank prototype. The prototype was also fitted with a mock weaponry (representing a 47mm gun and two machineguns). But the engine was not powerful enough, overheated and used a lot of fuel. In September 1937, the V6 engine was removed and the original Škoda engine intended for it was installed. However, the vehicle still didn’t do too well (the engine actually seized and had to be scrapped) and the tests were stopped in November, marking the end of the first development stage of T-21. By that time, the Ministry of Defence committee was looking for a suitable Czechoslovak medium tank for the army, but the Š-IIc did not to make the June 1938 army tests deadline – and that was the end of the T-21 as a potential Czechoslovak army medium tank. From June to November 1938, the prototype was modified further in Pilsen, thus creating a third (and final) variant of the original Š-IIc design (not counting the further modifications, made by Hungarians – the Turán tank is basically a Š-IIc copy, with partial improvements). This third variant had (apart from the fixed engine of the same type the second variant had) better tracks, improved engine cooling, improved oil pump and modified steering mechanism.

However, by that time, the Munich agreement completely changed the Czechoslovak army’s priorities and selling the (improved) vehicle to the Czechoslovak army was no longer an option. Therefore, Škoda tred to sell the design abroad. During factory trials, the third prototype performed reasonably well and was basically ready for export.

After the occupation of Czechoslovakia, that was of course no longer possible – not without German consent at least. During the early months of occupation, German delegations did visit the Škoda factory and tests were performed with the Š-IIc prototype, which, at that point, on 22.5.1939, was – to fit the German nomenclature principles – renamed to Škoda T-21 (T = tank, 2 = medium, 1 = 1st variant). The Germans didn’t show too much interest in it; they wanted to test it in Kummersdorf, but in the end, the Germans decided to produce an improved version, which was named T-22.

The British Carden-Lloyd Tankettes Czechoslovakia had acquired led to the Czechoslovakia designed tank, the Tančík vz. 33, which was assembled from a framework of steel "angle iron" beams, to which armor plates were riveted. The driver sat on the right side using a 300 mm × 125 mm (11.8 in × 4.9 in) observation port protected by 50 millimetres (2.0 in) of bulletproof glass and an armored shutter which had a 2 mm (0.079 in) slit. The gunner sat on the left and had a similar vision port half the size of the drivers. His ZB vz. 26 machine gun was mounted in a ball mount directly to his front. There were similar vision ports on the sides and the rear. The drivers machine gun was fixed and he fired it using a Bowden cable; 2,600 rounds were stored for the machine guns.

The front armor was 12 mm (0.47 in) thick, the sides had a thickness of 8 mm (0.31 in), the top was 6 mm (0.24 in) thick and the bottom plates were 6 mm (0.24 in) in thickness. This was deemed enough to deflect armor-piercing 7.92 mm (0.312 in) bullets fired from distances greater than 125 metres (137 yd) from the front and 185 metres (202 yd) from the sides. Both were supposed to withstand ordinary bullets from over 50 metres (55 yd).

The 1.95 litres (119 cu in), water-cooled, 30 horsepower (22 kW), inline 4-cylinder Praga engine sat directly in the fighting compartment. It had a top speed on the road of 35 kilometres per hour (22 mph). One 50-litre (13 US gal) fuel tank was located to the left of the engine. The transmission had four forward gears and one reverse gear. It, the reduction, differential, driving shafts and brakes were taken from the Praga AN truck. The suspension was a modified version of that used in the Carden-Loyd tankettes. The Tančík vz. 33 (literal translation Tankette model 33) was a Czechoslovak-designed tankette used mainly by Slovakia during World War II. Seventy-four were built. The Germans seized forty when they occupied Bohemia-Moravia in March 1939; there is no record of their use. The Slovaks captured 30 at the same time when they declared independence from Czechoslovakia. In Slovak service, it only saw combat during the Slovak National Uprising.

The AH-IV was another Czechoslovak-designed tankette. With this design, Českomoravská Kolben-Daněk was determined not to repeat the problems of its earlier Tančík vz. 33 tankette and gave the gunner a turret for better observation and all-around fields of fire. It was assembled from a framework of steel "angle iron" beams, to which armor plates between 12 and 6 mm (0.47 and 0.24 in) thick were riveted. The driver sat on the right side using an observation port protected by bulletproof glass and an armored shutter. To his right was a small vision slit. Also to his right, in all models except the Swedish Strv m/37, was a light Zbrojovka Brno ZB vz. 26 or vz. 30 machine gun that was usually locked in place and fired using a Bowden cable. The gunner sat on the left and manned a small turret fitted with a ZB vz. 35 or ZB vz. 37 heavy machine gun in a ball mount. Most of the machine guns barrel protruded from the mount and was protected by an armored trough. He had a large vision port to the right of the machine gun mount in the turret and a small vision slit on the left side of the superstructure. 3700 rounds were carried for the two machine guns. No radio was fitted.

The 3.468 litres (211.6 cu in), water-cooled, six-cylinder Praga engine produced 55 horsepower (41 kW) at 2500 rpm. It sat in the rear of the fighting compartment and drove the transmission via a drive shaft that ran forward between the driver and commander to the gearbox. Cooling air was designed to draw air in through the commanders and drivers hatches. This had the advantage of rapidly dispersing gun combustion gases when firing, but several disadvantages. The constant draft generated by the engine greatly affected the crew during cold weather, and the engine noise and heat increased crew fatigue. It had a top speed on the road of 45 kilometres per hour (28 mph) and a range between 150 and 170 kilometres (93 and 106 mi). The semi-automatic Praga-Wilson transmission had five forward gears and one reverse gear to drive the forward-mounted drive sprocket. The suspension was a smaller version of that used in the Panzerkampfwagen 38(t). It consisted of four large road wheels per side, each pair mounted on a wheel carrier and sprung by leaf springs. There were two wheel carriers per side. The idler wheel was at the rear and one return roller was fitted. It had a ground pressure of only 0.5 kg/cm2. It could cross a ditch 1.5 metres (4.9 ft) wide, climb an obstacle .5 to .6 metres (1.6 to 2.0 ft) high and ford a stream .8 metres (2.6 ft) deep.

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