140mm smoothbore gun

Rickshaw

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In the late 1980s, research started on the new next-generation tank gun. It was quickly determined that it needed to be 140mm calibre. Initially it was to fire the same projectiles as the 120mm gun but at a higher velocity from a similar smoothbore barrel.

My question - what was the British plan? Were they intending to adopt the 140mm smoothbore gun?
 

Kat Tsun

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Yes. ATAC was United States/France/Germany/United Kingdom up until at least the collapse of the Soviet Union.
 

SpudmanWP

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Just so you have an idea of how BIG that 140mm ETC round was. Here it is and yes, it's a 2-part round and yes, that's a 120mm round next to it :eek:

2DuylXF.png
 

Colonial-Marine

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I don't think it was an ETC gun, at least from what I've read.

Did the guns that were built vary from nation to nation (just sharing a NATO standard caliber) or was it a standardized design? Were the Swiss part of ATAC development? I know they tested a 140mm gun on an upgraded Leopard 2.

I know the US XM291 was designed to be easily converted to fire 120mm ammunition. Had a greater barrel length than the M256, shame that never went anywhere.
 

SpudmanWP

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Yes, it was ETC.

No clue if it was an international standard or a US only gun.

https://soapbox.manywords.press/2017/12/12/on-the-140mm-tank-gun/
https://soapbox.manywords.press/2017/12/19/m1-cattb/
 

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