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A tank is an armored fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armor, and good battlefield mobility provided by tracks and a powerful engine; usually their main armament is mounted in a turret. They are a mainstay of modern 20th and 21st century ground forces and a key part of combined arms combat.
Modern tanks are versatile mobile land weapons platforms whose main armament is a large-caliber tank gun mounted in a rotating gun turret, supplemented by machine guns or other ranged weapons such as anti-tank guided missiles or rocket launchers. They have heavy vehicle armor which provides protection for the crew, the vehicle's munition storage, fuel tank and propulsion systems. The use of tracks rather than wheels provides improved operational mobility which allows the tank to overcome rugged terrain and adverse conditions such as mud and ice/snow better than wheeled vehicles, and thus be more flexibly positioned at advantageous locations on the battlefield. These features enable the tank to perform well in a variety of intense combat situations, simultaneously both offensively (with direct fire from their powerful main gun) and defensively (as fire support and defilade for friendly troops due to the near invulnerability to common infantry small arms and good resistance against most heavier weapons), all while maintaining the mobility needed to exploit changing tactical situations. Fully integrating tanks into modern military forces spawned a new era of combat: armored warfare.

Until the arrival of the main battle tank, tanks were typically categorized either by weight class (light, medium, heavy or superheavy tanks) or doctrinal purpose (breakthrough-, cavalry-, infantry-, cruiser-, or reconnaissance tanks). Some being larger and very heavily armored and with large guns, while others are smaller, lightly armored, and equipped with a smaller caliber and lighter gun. These smaller tanks move over terrain with speed and agility and can perform a reconnaissance role in addition to engaging enemy targets. The smaller, faster tank would not normally engage in battle with a larger, heavily armored tank, except during a surprise flanking manoeuvre.

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  1. Zig168

    Leak in Airing Cupboard Tank

    The pipework around the hot water tank in the airing cupboard has developed several leaks after a chemical flush. It's an open vented system. Any ideas on controlling or fixing the leak? Should I turn off the red valve (pic 1) that has a leak next to it and rundown the hot water? Pic 2 a...
  2. T

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  3. T

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    Hi, (Not a pro, just DIY) One of these worked OK for 18 years, but seemed to have gone faulty. Replaced it with same, twice in last 2years. Running on HW only in summer, the domestic water is either scalding or lukewarm. Tried temp settings over 50 & 60. I was thinking that the microswitch...
  4. J

    Recommended temperature on hot water tank

    Hi All I hope you are doing well. I have this water tank for hot water heated by a Baxi boiler or electrical heater. What is the recommended temperature on it? I see Danfoss ATC written near the knob. Is it what the end-user wants or there is a reason behind 50 or 60 Centigrade? I think it was...
  5. dilligaf

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    Is it okay to use the boiler to heat the storage tank only whilst the central heating radiators are drained on with a conventional system?
  6. K

    Fungus/growth floating on top of feed & expansion tank?

    I’ve recently cleaned my central heating system with Sentinel X400 cleaner, flushed it out clear, refilled & added Sentinel X100 inhibitor. After a couple of months, I went to the loft to check the feed & expansion tank, open the lid, there’s some kind of white/yellowish fungus/growth floating...
  7. T

    Is there water in the tank?

    Hi, we have an old water tank in our roof that's not used anymore. We have a contractor for something else wanting to cut a pipe from it. I'm worried that there might be water in the tank that will come out if the pipe is cut. How do I tell if there's water in the tank? Do old tanks normally...
  8. B

    Part of Immersion Heater Element Fell into Tank

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  9. C

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  10. J

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  11. C

    DAB Esybox and break tank

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  12. J

    Hot water leaking at overflow

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  13. H

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    Hiya, we had a new pressurised hot water cylinder fitted a few weeks ago even though its double the size of our last one we are finding we aren't getting any more hot water. So once the tank is full and the immersion has turned off and i touch the tank only the top half feels warm and the bottom...
  14. C

    Flats bathrooms fed by tank?

    Hi guys I did a job today in a block of flats, fairly old place, plumbing was all a bit ropey in this particular flat. The job was to change an electric shower over, I changed it, didn't work.. noticed the water pressure was a bit pants.. I could stop it with my finger on the basin.. thought...
  15. B

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    Hi everyone, I have a query which I hope I can get advice on. I live on a top floor flat in a block of 6 the water is mains fed in the kitchen and bathroom but the attic has common water tanks which I believe feed the hot water and are cleaned annually. My kitchen has a gas combi boiler...
  16. S

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  17. B

    Removal of cold water tank for bathroom taps?

    I live in an apartment and have a cold water tank in it. The cold water tank feeds the cold water tap in the sink and the bath. Recently, I refurbished my bathroom and, according to the plumber that fitted the new taps, high-pressure taps were fitted. Consequently, the water that comes out of...
  18. N

    Scrap copper tank clean up??

    On to the scraping side now! Is it worth bothering to remove insulation from old water tank and weigh in clean, or just take it down to the scrapper as it is?? ? Mnhjffhjbn
  19. J

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    Moved into an old house that has a vented gravity fed system (cold water tank and feed + expansion tank in the attic). I need to replace all ceased gate valves which is all of them... The feed pipe from the F+E tank to the oil boiler/radiators has a gate valve in the open position at the...
  20. S

    Unvented Tank Advice Please

    Hi. I have looked at similar posts but not seen exactly what I'm after ... unvented Gledhill 200l fitted a few months ago. A few weeks after and since most times when we turn on hot water tap in the morning there is a long groaning sound (I have a recording if it helps). Have contacted...
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