Question: why don't more tanks have secondary weapon systems?

>>33082283
Because it takes up space and adds weight to a platform where those two thing are already at a premium.

Seems like you can just fire 120mm HEAT rounds if there's something the 50 won't deal with.

Mostly I think to improve crew comfort, packing a 20mm into an already cramped turret degrades performance with little practical gain. It's also another potential fail point in the armor. Like machine gun ports in the hull armor.

>>33082305
/Thread

It's expensive.
It takes up space that can be used for other subsystems or ammunition. And you have less ammunition overall if you opt to remove the coaxial MG + ammo for the cannon + ammo.
You already have a cannon big enough to fuck anything up. The margin of stuff that's "not worth" a 120mm shell and the stuff that's too far/heavily armored for a .50 is relatively small.

Worth separating the Merkava's mortar in the discussion, since it's more for the utility of flares and smoke than the fragmentation.

>>33082283
Because HEAT/HE is more than capable of killing vehicles.

>>33082283
You'd be surprised how many things a cannon will kill.

Just need some low velocity airbursting rounds to be developed

>>33082283
In Americas case the secondary weapon system to the Abrams is air superiority

>>33082929
>spend 200+ billion a year just to save some room on a tank

sounds bout right

File: BMP-3cut.jpg (57KB, 600x267px) Image search: [Google]

57KB, 600x267px

>>33082283
just look at how packed a BMP 3 is and its only a 100mm gun

>>33083254
Except autocannon ammo is much larger and heavier than .50 BMG ammo, much less 7.62 NATO. So you can carry a couple hundred rounds instead of a few thousand, which means more frequent rearming, which in the long run means more main gun rounds being expended on soft targets after you run out of autocannon.

File: Chrysler early XM1.png (145KB, 527x266px) Image search: [Google]

145KB, 527x266px

An autocannon will be always more effective against infantry and light armored vehicles than a mere heavy machine gun, therefore avoiding use expensive main gun rounds for nothing.

>>33082310
Good point about the MG ports, and why secondary weapons have been shifted outside the armor. I could see a remotely operated mk 19 station, but it would clutter up the turret.

>>33083105
Anon, the bmp-3 packs a 30 mm coaxial autocannon...

File: AMX-40 cutaway.jpg (99KB, 736x532px) Image search: [Google]

99KB, 736x532px

>>33083291

The AMX-40 carried 578 twenty-millimeter rounds, almost twice the amount of .50 rounds carried by the Russian T-90.

File: kxUyuga.jpg (167KB, 1124x750px) Image search: [Google]

167KB, 1124x750px

>>33083373

It's cute too. Sort of a 'take your daughter to work day' barrel arrangement.

Doesn't really benefit the role of a Main Battle Tank to have a secondary weapon that doesn't assist much at high movement speed.

>>33083373
>30 mm coaxial autocannon
the BMP-3 armament consist of a 100mm gun and a 30 mm autocanon also a secondary PKT mg

>>33083426
>>33083483
Also that is a BMD 3 which is the airborne version

>>33083488
Was wondering where the hull mg's went... The BMP-3 is really orky.

File: 140208402311.jpg (858KB, 1350x900px) Image search: [Google]

858KB, 1350x900px

>>33083500
Meet its cousin, the BMPT.

File: 1425401845748.jpg (72KB, 367x339px) Image search: [Google]

72KB, 367x339px

>>33083881
01001001 00100000 01101000 01100001 01110110 01100101 00100000 01101110 01101111 00100000 01100100 01101001 01100011 01101011 00101100 00100000 01100001 01101110 01100100 00100000 01001001 00100000 01101101 01110101 01110011 01110100 00100000 01100011 01110101 01101101 00100000 01100010 01110101 01100011 01101011 01100101 01110100 01110011 00101110

>>33083967
01010100011011110111000000100000011010110110010101101011

Question, as long as we're on this subject. Did the Type-74 ever actually mount 40mm grenade launchers, or is that something Wargame made up?

The autocannons and ATGM's are there. They are just mounted on the IFVs and helicopter gunships.

Only a retard packs everything onto one platform in the age of combined arms.