ground force M1 CATTB

[Sanebynight7130@live 59]

From what ive been reading the photos of the CATTB with the gun that has the bore evac is acutally the 120mm barrel . 

I suppose the 140mm used a vaccum system ? Was the 140mm ever tested on the CATTB or was it planned ? We know the M1 Thumper has the 140mm as its clearly distinctive from the 120s .

The 140mm on the M1 Thumper and the KWS iii look indentical , neither have a bore evac . 

 

Really I would like to see both the Thumper and the CATTB 120 in the American tree .

[armando30 493]

4 hours ago, Futarrari@live said:

From what ive been reading the photos of the CATTB with the gun that has the bore evac is acutally the 120mm barrel . 

I suppose the 140mm used a vaccum system ? Was the 140mm ever tested on the CATTB or was it planned ? We know the M1 Thumper has the 140mm as its clearly distinctive from the 120s .

The 140mm on the M1 Thumper and the KWS iii look indentical , neither have a bore evac . 

 

Really I would like to see both the Thumper and the CATTB 120 in the American tree .

 

actually that is incorrect, the XM291 ATAC is a dual-caliber cannon, it was designed so that the same gun could fire both 140mm and 120mm ammo just by switching barrels

 

as for the Thumper it was actually the other way around, the Thumper was armed with the 120mm version

Quote

The last chapter of the CATTB history was written in the 1990s with the “Thumper” Abrams. The Thumper was effectively a stripped version of the CATTB built by Lockheed Martin. It lacked several advanced (but expensive) systems and was armed exclusively with the 120mm version of the XM291 gun – it was no longer viable to switch to the 140mm caliber. The tank was lighter than the CATTB, but its armor levels reached only those of the M1A2. The Thumper was tested for a while alongside the XM8 (the first one), but, unfortunately for it, shared its fate and would also get canceled. We are adding this information because the Thumper and the CATTB get often mixed up, although they are different vehicles.

 

[Sanebynight7130@live 59]

12 hours ago, armando30 said:

 

actually that is incorrect, the XM291 ATAC is a dual-caliber cannon, it was designed so that the same gun could fire both 140mm and 120mm ammo just by switching barrels

 

as for the Thumper it was actually the other way around, the Thumper was armed with the 120mm version

 

You missed what I said , the "barrel" in the photos is the 120mm I know it can swap barrels what im saying is I havnt seen any pictures of it with the 140mm barrel installed . 

 

You can clearly see the 140mm gun is identical to the one the Thumper mounts .

[Sanebynight7130@live 59]

From what I can find this is the 140mm cannon its idtentical to the cannon of the M1 Thumper .

 

 

[armando30 493]

18 hours ago, Futarrari@live said:

From what I can find this is the 140mm cannon its idtentical to the cannon of the M1 Thumper .

 

honestly the difference in caliber is not significative enough to notice unless you have both barrels side-by-side, additionally both barrels were about the same length with the 140mm L/47 barrel being 20mm shorter than the 120mm L/55 barrel (curiously the same difference in caliber)

 

we also cannot assume the one on the CATTB was not the 140mm just because that gun has a larger brore evacuator, you might not know but on the 120mm smoothbore that equips the Abrams the bore evacuator is a part that can be replaced and upgraded, and so it might simply be a case of trying different things or simply not installing one on the Thumper

 

also, the development of the XM291 140mm matches the CATTB (mid~late 80's) while the Thumper was built in the early 90's around the collapse of the Soviet Union, which gives strength to the text I quoted about the Thumper only being equiped with the 120mm barrel, afterall there was no more panic about Russia producing a monstruous MBT with a 152mm smoothbore cannon, furthermore they had plenty of 120mm ammo available that the new gun could also fire

 

lastly we cannot forget the other uses of the XM291 120, in 2003 they made a technology demonstrator based on the M8 AGS called the M8 Thunderbolt Demonstrator

Spoiler

 

and since 2006 that has been marketed as the M8 Thunderbolt or AGS 120

Spoiler

 

as you can see it does not have the bulgey bore evactuator just like on the Thumper, but then we also have this

Spoiler

 

which is a M1A1 with a modified turret to mount the XM291 and as you can see the bore evacuator seems to be similar to the one used by the "normal" 120mm Abrams and not the same the CATTB used, once again may simply mean they tested different configurations of both guns

 

in the end all I have to trust is in having read that the Thumper is to the CATTB like the XM803 is to the MBT-70, a independent program to make a cheaper alternative while leaving ut the most expensive tech used on the CATTB

[Sanebynight7130@live 59]

43 minutes ago, armando30 said:

 

honestly the difference in caliber is not significative enough to notice unless you have both barrels side-by-side, additionally both barrels were about the same length with the 140mm L/47 barrel being 20mm shorter than the 120mm L/55 barrel (curiously the same difference in caliber)

 

we also cannot assume the one on the CATTB was not the 140mm just because that gun has a larger brore evacuator, you might not know but on the 120mm smoothbore that equips the Abrams the bore evacuator is a part that can be replaced and upgraded, and so it might simply be a case of trying different things or simply not installing one on the Thumper

 

also, the development of the XM291 140mm matches the CATTB (mid~late 80's) while the Thumper was built in the early 90's around the collapse of the Soviet Union, which gives strength to the text I quoted about the Thumper only being equiped with the 120mm barrel, afterall there was no more panic about Russia producing a monstruous MBT with a 152mm smoothbore cannon, furthermore they had plenty of 120mm ammo available that the new gun could also fire

 

lastly we cannot forget the other uses of the XM291 120, in 2003 they made a technology demonstrator based on the M8 AGS called the M8 Thunderbolt Demonstrator

  Reveal hidden contents

 

and since 2006 that has been marketed as the M8 Thunderbolt or AGS 120

  Reveal hidden contents

 

as you can see it does not have the bulgey bore evactuator just like on the Thumper, but then we also have this

  Reveal hidden contents

 

which is a M1A1 with a modified turret to mount the XM291 and as you can see the bore evacuator seems to be similar to the one used by the "normal" 120mm Abrams and not the same the CATTB used, once again may simply mean they tested different configurations of both guns

 

in the end all I have to trust is in having read that the Thumper is to the CATTB like the XM803 is to the MBT-70, a independent program to make a cheaper alternative while leaving ut the most expensive tech used on the CATTB

https://apps.dtic.mil/dtic/tr/fulltext/u2/a228389.pdf

 

 

LockHeed Martin didnt build the Thumper 

[Sanebynight7130@live 59]

The 120 xm291 on the Thunderbolt the thermal sleeve while similair is still different than the 140 . Notice the forward section where the sleeve steps down on the Thumper is alot longer . 

Heres what im talking about this photo of the 140mm XM291 is the gun on the Thumper . 

 

[armando30 493]

until now I thought

«there's no way the CATTB, Thumper, TTB, T57, T77 and T58 will be added to War Thunder»

 

but now we have the Obj.279, there are no longer limits to anything and so I am now more optimistic regarding the CATTB and others being added

[CokeSpray 7,274]

Suggestion passed to the developers for consideration.