1.India did not even have a armour tech or suspension when it started Arjun.
Is it logical that you would import if you dont have the tech in house? India did not have everything given on a golden plate.
The "famed foreign" components have the luxury to fail,while DRDO delivers low quality stuff if it's components have some issues?
No, there is another question. No one blame Arjun more or less when specifically Indian component fail. But they blame Arjun if ANYTHING fails - regardless of country of origin. Because it is job of Arjun's developers - to find suitable foreign supplier, to integrate the supplied product right, to control the quality.
2."Design Specification"? So you saying MTU did not know that engines won't work above 60C? It has been couple of decades and they still have to come up with a engine which works at 69C? And that is DRDO's fault? if it was as easy as you gave the example,it would not taken that long to fix the engine issue.
MTU Very WELL know the engine MIGHT not work above 60C. And i'm 100% sure it is written somewhere in supplied manual. But i have strong suspect what Arjun developers didnt managed to ensure that 60C limit for MTU engine.
Did you happen to see the brochures of these "cutting edge" products? If they work as claimed, it would have worked in Indian conditions as well. Atleast that is expected out of "market leaders" isn't it?
Because technic is a bit more complex than it is written in 2-page brochures. There are many "if's" , "but's" , complex interdependent limitations, etc - and it is job of Arjun system integrators (sometimes together with component manufactures) to provide flawless integration and working condition for separate Arjun components.
This is also reason why it is not so simply to just bastle best foreign components in one basket and become 1A working product.
3.How would you know something is reliable if you haven't tried it out and spend huge efforts testing it out? DRDO does not have a magic wand which picks the right systems in blink of a eye.Care to tell me which other 1400 hp engine DRDO could have picked up instead of MTU?
May be they could test MTU before buying it? And even if not - who cares? It is still fail of Arjun as project - together with MTU, admittedly. Of course IF, and only IF the failure of MTU is caused by original MTU bug, and not wrong integration.
From Indian Army point of view it is not so important WHY Arjun dont work.
4. The money spend on Arjun dev(from day one till date) is 90 million dollars. How many "excellent tank" could have India bought? 20, 40? You complain that India spend too much money on Arjun and at the same time say DRDO should pick up perfect systems irrespective of it's cost.
You can't have it both ways can you?
Well, it is bit close to 220-250 mils as i know. As i said, excellent RESEARCH outcome for the money. Just dont sell this tank to Indian army please.