German Tiger Tank Vs Russian T 34
Shane Rouse
While the Tiger I has been called an outstanding design for its time,[13] it has also been called overengineered,[14] using expensive materials and labour-intensive production methods. In the early period, the Tiger was prone to certain types of track failures and breakdowns. It was expensive to maintain, but generally mechanically reliable.[15] It was difficult to transport and vulnerable to immobilisation when mud, ice, and snow froze between its overlapping and interleaved Schachtellaufwerk-pattern road wheels, often jamming them solid.
The tank was given its nickname "Tiger" by the ministry for armament and ammunition by 7 August 1941,[16] and the Roman numeral was added after the Tiger II entered production. It was classified with ordnance inventory designation Sd.Kfz. 182. The tank was later re-designated as PzKpfw VI Ausf. E in March 1943, with ordnance inventory designation Sd.Kfz. 181.
Today, only nine Tiger I tanks survive in museums and private collections worldwide. As of 2021[update], Tiger 131 (captured during the North African campaign) at the UK's Tank Museum is the only example restored to running order.
Before Durchbruchwagen I was completed, a request was issued for a heavier 30-tonne class vehicle with thicker armour, the Durchbruchwagen II, which would have had 50 mm (2.0 in) of frontal armour and mounted a Panzer IV turret with a short-barrelled (24 calibres long) 7.5 cm KwK 37 gun. The overall weight would have been 36 tonnes. Only one hull was built, and no turret was fitted. Further development of the Durchbruchwagen was dropped in 1938 in favour of the larger and better-armoured VK 30.01 (H) and VK 36.01 (H) designs.[e] Both the Durchbruchwagen I and II prototype hulls were used as test vehicles until 1941.[citation needed]
Combat experience against the French SOMUA S35 cavalry tank and Char B1 heavy tank, and the British Matilda II infantry tanks during the Battle of France in June 1940 showed that the German Army needed better armed and armoured tanks.[18]
On 22 June 1941, Germany launched Operation Barbarossa, the invasion of the Soviet Union. The Germans encountered large numbers of Soviet T-34 medium and KV-1 heavy tanks.[20] According to Henschel designer Erwin Aders, "There was great consternation when it was discovered that the Soviet tanks were superior to anything available to the Heer."[21]
Weight increase to 45 tonnes and an increase in gun calibre to 8.8 cm (3.5 in) were ordered for it on 26 May 1941.[22] The due date for the new prototypes was set for 20 April 1942, Adolf Hitler's 53rd birthday. Unlike the Panther tank, the designs did not incorporate sloped armour.
Porsche and Henschel submitted prototype designs, each making use of the Krupp-designed turret. They were demonstrated at Rastenburg in front of Hitler. The Henschel design was accepted, mainly because the Porsche VK 4501 (P) prototype design used a troubled petrol-electric transmission system which needed large quantities of copper for the manufacture of its electrical drivetrain components, a strategic war material of which Germany had limited supplies with acceptable electrical properties for such uses.[23] Production of the Panzerkampfwagen VI Ausf. H began in August 1942. Expecting an order for his tank, Porsche built 100 chassis. After the contract was awarded to Henschel, they were used for a new turretless, casemate-style tank destroyer; 91 hulls were converted into the Panzerjger Tiger (P) in early 1943.
The Tiger was still at the prototype stage when it was first hurried into service, and therefore changes both large and small were made throughout the production run. A redesigned turret with a lower cupola was the most significant change. The river-fording submersion capability and an external air-filtration system were dropped to cut costs.[citation needed]
While heavy, this tank was not slower than the best of its opponents. Although the general design and layout were broadly similar to the Panzer IV medium tank, the Tiger weighed more than twice as much. This was due to its substantially thicker armour, the larger main gun, greater volume of fuel and ammunition storage, larger engine, and a more solidly built transmission and suspension.
The Tiger I had frontal hull armour 100 mm (3.9 in) thick, frontal turret of 100 mm and gun mantlet with a varying thickness of 120 to 200 mm (4.7 to 7.9 in).[24] The Tiger had 60 mm (2.4 in) thick hull side plates and 80 mm (3.1 in) armour on the side superstructure/sponsons, while turret sides and rear were 80 mm. The top and bottom armour was 25 mm (1 in) thick; from March 1944, the turret roof was thickened to 40 mm (1.6 in).[7] Armour plates were mostly flat, with interlocking construction. This flat construction encouraged angling the Tiger hull roughly 30-45 when firing in order to increase effective thickness.
The 56-calibre long 8.8 cm KwK 36 was chosen for the Tiger. A combination of a flat trajectory from the high muzzle velocity and precision from the Leitz Turmzielfernrohr TZF 9b sight (later replaced by the monocular TZF 9c) made it very accurate. In British wartime firing trials, five successive hits were scored on a 16 by 18 in (410 by 460 mm) target at a range of 1,200 yards (1,100 m).[21] Compared with the other contemporary German tank guns, the 8.8 cm KwK 36 had superior penetration to the 7.5 cm KwK 40 on the Sturmgeschtz III and Panzer IV but inferior to the 7.5 cm KwK 42 on the Panther tank[25] under ranges of 2,500 metres. At greater ranges, the 8.8 cm KwK 36 was superior in penetration and accuracy. British trials found the gun took from 6 to 16 seconds to reload varying on turret position and consequently which storage bin was being used.[26]
The ammunition for the Tiger had electrically fired primers. Four types of ammunition were available but not all were fully available; the PzGr 40 shell used tungsten, which was in short supply as the war progressed.
The rear of the tank held an engine compartment flanked by two separate rear compartments each containing a fuel tank and radiator. The Germans had not developed an adequate diesel engine, so a petrol (gasoline) powerplant had to be used instead. The original engine used was a 21.35 L (1,303 in3) 12-cylinder Maybach HL210 P45 developing 485 kW (650 hp) at 3,000 rpm and a top speed of 38 km/h (24 mph).[27] It was found to be underpowered for the vehicle from the 251st Tiger onwards. It was replaced by the upgraded HL 230 P45, a 23.095 L (1,409 in3) engine developing 521 kW (699 hp) at 3,000 rpm.[28] The main difference between these engines was that the original Maybach HL 210 used an aluminium engine block while the Maybach HL 230 used a cast-iron engine block. The cast-iron block allowed for larger cylinders (and thus, greater displacement) which increased the power output to 521 kW (699 hp). The engine was in V-form, with two cylinder banks set at 60 degrees. An inertia starter was mounted on its right side, driven via chain gears through a port in the rear wall. The engine could be lifted out through a hatch on the rear hull roof. In comparison to other V12 and various vee-form gasoline engines used for tanks, the eventual HL 230 engine was nearly 4 L (240 in3) smaller in displacement than the Allied British Rolls-Royce Meteor V12 AFV power plant, itself adapted from the RR Merlin but de-rated to 448 kW (601 hp) power output; and the American Ford-designed precursor V12 to its Ford GAA V-8 AFV engine of 18 litre displacement, which in its original V12 form would have had the same 27 L (1,600 in3) displacement as the Meteor.
The engine drove the front sprockets through a drivetrain connecting to a transmission in the front portion of the lower hull; the front sprockets had to be mounted relatively low as a result. The Krupp-designed 11-tonne turret had a hydraulic motor whose pump was powered by mechanical drive from the engine. A full rotation took about a minute.
Another new feature was the Maybach-Olvar hydraulically controlled semi-automatic pre-selector gearbox. The extreme weight of the tank also required a new steering system. Germany's Argus Motoren, where Hermann Klaue had invented a ring brake[31] in 1940, supplied them for the Arado Ar 96[32] and also supplied the 55 cm (22 in) disc.[33] Klaue was acknowledged in the patent application that he had improved, it can even be traced back to British designs dating to 1904. It is unclear whether Klaue's patent ring brake was used in the Tiger brake design.
Powered turret traverse was provided by the variable speed Boehringer-Sturm L4 hydraulic motor, which was driven from the main engine by a secondary drive shaft. On early production versions of the Tiger maximum turret traverse was limited to 6 degrees per second, whilst on later versions a selectable high speed traverse gear was added. Thus, the turret could be rotated 360 degrees at up to 6 degrees per second in low gear independent of engine rpm (same as on early production versions), or up to 19 degrees per second with the high-speed setting and engine at 2,000 rpm, and at over 36 degrees per second at the maximum allowable engine speed of 3,000 rpm. The direction and speed of traverse was controlled by the gunner through foot pedals, the speed of traverse corresponding to the level of depression the gunner applied to the foot pedal. This system allowed for very precise control of powered traverse, a light touch on the pedal resulting in a minimum traverse speed of 0.1 degrees per second (360 degrees in 60 minutes), unlike in most other tanks of the time (e.g., the US M4 Sherman or Soviet T-34) this allowed for fine laying of the gun without the gunner needing to use his traverse handwheel.[36]
The suspension used sixteen torsion bars, with eight suspension arms per side. To save space, the swing arms were leading on one side and trailing on the other side; this is called an H suspension[37] setup. There were three road wheels (one of them double, closest to the track's centre) on each arm, in a so-called Schachtellaufwerk overlapping and interleaved arrangement, similar to that pioneered on German half-tracked military vehicles of the pre-World War II era, with the Tiger I being the first all-tracked German AFV built in quantity to use such a road wheel arrangement. The wheels had a diameter of 800 mm (31 in) in the Schachtellaufwerk arrangement for the Tiger I's suspension, providing a high uniform distribution of the load onto the track, at the cost of increased maintenance.
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