Since when does ease of manufacture and production numbers making anything better?
I still believe the Panther ausf G was the best all around tank of the war, it had the best combination of protection, weapon and mobility. The T-34 was an excellent tank as well but only rates "best" when "ease of manufacture and total numbers built" criteria get tossed in. Since when does ease of manufacture and production numbers making anything better? Based on that philosophy, a Plymouth Neon is better than a BMW 750i.
It seems to me the 'philosophy' applied to tank manufacture during major international conflicts is somewhat different to marketing cars
However it is not out of place in peacetime marketing.
The object of the tank production is to achieve victory through combat dominance and eventually providing effective and flexible options to the commanders at different levels of responsibility.
Vehicle casualties were higher during WW2 then crew casualties, so it was desirable for the crews having a replacement vehicle to get back into combat. This allows retention of experience and prevents combat shock setting in, both very important factors in tank combat.
Much effort was made to return even the recovered vehicle casualties, and the Chrysler Detroit plant (for example) which manufactured a quarter of all US tanks also rebuilt 3,000 during the war.
Ease of manufacturing and production ensures this availability of replacement vehicles. It was dominant in Soviet manufacturing in general, and was embraced in United States also earlier in the war because it was expected that invasion of Europe may take place in 1942. However as the invasion was delayed, and experience with tanks was gained (US didn't have a Tank Corps until 1941), designs became more complex in part due to the British limited experience in North Africa.
There was still a desire in US to simplify the manufacturing, and the change over from riveting tanks together to welding of both armor plate and castings was complete in the US by 1943, and many of welding process refinements were learned and applied in Sherman tank assembly factories. Sherman was still a fairly simple and robust design, and those who designed it should be better known and heralded for what was essentially a T-34 equivalent in the West as far as the mainstay of the Western Allies are concerned. Having said that, the T6 was a direct derivative of the M3 in terms of design, but replaced the superstructure with a single larger turret. This was in part based on the consideration that there was already an existing production of the hulls in a very limited (at the time) tank production in the USA, so the changes in production that need to be made were made as painless as possible considering Presidential demands of 45,000 tanks by 1943 (never attained)!
Lastly, availability of numbers of tanks allows for greater tactical, operational and strategic flexibility to commanders. This is something that was increasingly denied to the Wehrmacht as the war went on due to their inability to field required numbers of tanks along the fronts.
The design criteria have been different in Soviet Union and the rest of Europe due to nature of defence industries. In the West tanks had to be paid for by governments at a cost that would allow a profit margin to the manufacturers. Because the budgets were limited, the designs were sought to have, what Americans call, "more bang for the buck". This philosophy however came from Germany where post-Depression recovery denied Hitler the funds to build a large enough tank park, so he was persuaded to instead opt for quality over quantity. This proved to be fairly easy for a personality ‘inspired’ by ‘super’ and ‘miracle’ weapons. This is known as the "engineer's" or ‘producer’ approach to AFV design.
The early Soviet approach had been impacted by the lack of qualified labour, and even greater need for recovery from the combined effects of WW1 and Civil War, coupled with the effects of Depression on Soviet exports. However doctrinal development in cooperation with Germans in late 20s and early 30s led Soviet designers to initiate production of designers based on specifications derived from doctrinal considerations, or the “client” approach to AFV design.
The doctrinal considerations however played a role in tank designs outside of USSR. German doctrine has always been defensive, even if aggressively so, while that of Soviet Union has always been offensive even if ostensively ‘defensive’ for political reasons. The ‘celebration’ of blitzkrieg tends to ignore this, but the reality is that analysis of tank fleets, as the most offensive part of the army, shows that Soviet Tank fleet was by far the larger (in recognition of larger casualties incurred by attacker), and included types which were explicitly made for offensive operations, i.e. the BT series. Impact of doctrine on design elsewhere produced tanks in France and the UK which emphasized infantry support, or were underpowered for true offensives.
Design in Germany was also influenced by the wartime lack of raw materials used in tank manufacture, and most importantly those for hardened steel. Inability to increase steel hardening without increasing volume of metal (face hardened steel initially used) forced German designers to use heavier plates, and consequently increased overall tank size due to need for a larger power-pack. Russians were able to retain their steel manufacturing technology, thus maintaining lower overall weight. Wartime Allied measurement in Brinnel Hardness shows that early war armour was around 200-300 BHN. However Soviet manufacturers were able to raise this to 400-450 BHN after 1943. Germany was never able to raise the hardness to above 375 BHN. This caused the Panther, intended to be a counterpart to the T-34 to effectively assume a heavy tank role with 45ton of combat weight compared to the 32ton T-34-85. It needs to be remembered that the T-34 was not developed to counter German tank types, but to replace T-26 and BT series tanks to fulfil specific doctrinal role.
In US after the war this ‘T-34’ role was recognized in the US Army.
“During 1946 the Tank Destroyer Command, the Armored Command and the Cavalry were merged as the Armored Cavalry because it was felt that tactical methods and objectives during World War II had been common to all three. The objectives insofar as vehicle design was concerned were to develop components which would make possible the replacement of the World War II M-24 Light Tank, the MA-A3-E8 Medium Tank and the M-26 Heavy Tank. In each class, emphasis was to be placed on lightness of weight consistent with the most powerful armament possible; parts standardization; reliability in extremes of temperature; simplicity of field maintenance in those extremes; and conservation of materials.”
http://www.pattonhq.com/m47files.html
To summarise, the offensive doctrine, need for retaining large fleet reserves and ability to implement manufacturing and production change, all contributed to greater flexibility in use of tank forces as part of general Soviet strategy in WW2, and defined the T-34 as a superior design.
While Western Allied M4 design was also developed with same philosophy, the far more limited deployment of troops, and far less serious opposition they faced, as well as heavier reliance on air support, prevented development of a robust doctrine for what later became NATO tank forces, and led to later acceptance of German experience as doctrine model, and tank design guide within the context of market economies of the West.
After WW2 the Western Allies adopted a philosophy that relied on nuclear retaliation coupled with (mistaken) reliance on strategic bombing in an era which until late 50s can generally be called the ‘Air Force era’.
However own experience with German heavy tanks, and German experiences on the Eastern Front with Soviet heavy tanks (from 1941), convinced US and Britain to design heavy ‘main’ tanks because effects of radiation on troops were not yet understood, and because German impressions of Soviet use of tanks was downplayed, and vehicle survival emphasized. This was because of low availability of replacements to Wehrmacht, and because of significant reduction of tank building budgets in the peacetime West.
In US the M26 Pershing was redesignated as Medium tank (originally Heavy), and there begun a program to enhance the wartime design with medium designs abandoned (though light tanks continued). Eventually this culminated in the M46 which was essentially an M26 in basic design. In total 1160 M26s were rebuilt: 800 to the M46, 360 to the M46A1 standard (from a total of 2212 built). From there the M47/M48/60 designs represent redesign of the basic M26 rather then significant new design development due to change in doctrine or manufacturing change.
The M46/47 design suffered from the ‘German engineering affliction’ in that
The M-46 hull was better ballistically, at least in front. The T-42 turret was put into production. The M-46 hull and chassis was modified and the two were married. Thus this tank was considered an emergency vehicle created out of existing components, but even with the short cuts taken, the vehicle never became available for use in Korea.
It was a design which was put together without test and as could be expected, many "bugs" developed. Ordnance refused to accept them until the tanks could be classed as serviceable and considerable time elapsed until the necessary testing which should have been done first was done after production and the necessary corrections were made by the two producers, the Detroit Tank Arsenal and the American Locomotive Company.
http://www.pattonhq.com/m47files.html
For the US tank production declined steadily through the Cold War
A total of 8,576 [8,676?] M47 were produced (including exports)
Some 11,703 M48s were built between 1952 and 1959 (including about 2,300 exports)
Over 15,000 M60s were built by Chrysler between 1961 and 1980 (including about 3,200? exports)
Initial Defense Department budget was for 7,058 M1s at a cost of roughly $19 billion (before exports)
This design thinking was still based on the nuclear strategy, but recognized that US and NATO troops may be used in ‘limited war’ scenarios where nuclear weapons would not be used. The philosophy was to increase crew survivability by enhancing tank systems. This philosophy was seen as substantiated by the Israeli experience.
The thinking was largely a continuation of the German philosophy of the heavy sophisticated tank due to absence of NATO operational doctrine outside of ‘flexible defence’ unlike that of Soviet breakthrough/exploitation developed during WW2.
In fact the M1 design owes its beginnings to the US/German co-design project begun in the late 70s for a heavy tank to (in German view) coexist with the Leopard 1 just entering service at the time (probably seen as the modern Panther role). The project ended with US and Germany abandoning cooperation due to differences of opinion reputedly on gun and engine to be used, as well as US looking for a Main Battle Tank (i.e. a tank purchasable in significant quantities like the M48/60) rather then a heavy tank following the M103 experience.
In Soviet Union there was a realization that the heavy Western tanks required a larger weapon to defeat their armour (just like the Tiger experience of WW2), but offensive doctrine still demanded medium tanks able to maintain rates of advance. This, coupled with the realization of the true effects of radiation on troops in early 50s led Soviet designers to produce the T-54/55 series with the 100mm weapon. This design was not judged able to defeat the next generation of heavy tanks being designed in the West, and the T-62 with 115mm gun was later put into production for limited deployment in selected areas of probable use.
However it was realized that guided weapon development increased range of engagement, and required heavier volume of tank fire, so designs to replace the T-55 were begun, and culminated with the T-64 and the T-72 from two separate design bureaus. These designs conformed to the development of offensive doctrine in USSR since 1936, but also included the ability to use guided weapons against targets at extreme ranges. These types, and their derivatives and modifications became the Soviet Main Battle Tanks while retaining the medium tank’s offensive doctrinal fit.
Germany meanwhile used car market marketing to capture the European market in tank fleets by offering the ‘locals’ Leopard II as a replacement for their Leopard Is (with exception of France and UK) which emphasized reliability and service