Jump to content
Please support this forum by joining the SH Patreon ×
Sturgeon's House

United States Military Vehicle General: Guns, G*vins, and Gas Turbines


Recommended Posts

  • 2 weeks later...
  • 3 weeks later...
  • 2 weeks later...

M551 question.

So the gunner has 2 sight options, either the M127 or M127A1 telescopic sight or the M44 passive infrared periscope M44. But neither sight has a sight picture or increments for a specific round used. How did the gunner knew how to adjust the aim point when using different type of rounds(M409A1 HEAT, M657A2 HE or the canister round)?


Link to comment
Share on other sites

We've all seen this one, but, hey - kudos to that gunner for punching above his weight:


Bradley doing Bradley things, as originally intended:

Hi-lo concept reappears:




I know this belongs in the Brit thread, but - oh well: AGS' low-profile turret slapped on top of a Centurion Mk.V




Link to comment
Share on other sites

On 1/22/2024 at 7:40 PM, Cleb said:

An oddity. SEPv3 hull, weird turret. Unsure if it's a mockup, photoshop, or whatever have you.

Image was posted by the "E-4 Mafia Official" on Facebook. 




Fairly confident this is a photoshop, the person who made it does not appear to be aware of the offset mantlet an Abrams has.

Link to comment
Share on other sites

  • 2 weeks later...
  • 2 weeks later...
  • 3 weeks later...



"This Sources Sought is to assess available and viable Company Level Small Uncrewed Aircraft System candidates for a follow-on demonstration in support of the United States Army Maneuver Elements. Additionally, these UASs may fulfill a Directed Requirement initiative or future Urgent Capability Acquisition. The UAS must be 2020 NDAA Sec 848 and 2023 NDAA Sec 817 compliant or demonstrate a path to compliance."

Link to comment
Share on other sites

*sigh* And another one bites the dust...





The U.S. Army is changing its approach to acquiring a long-range artillery capability and scrapping its 58-caliber Extended Range Cannon Artillery prototyping effort, according to the service’s acquisition chief.

“We concluded the prototyping activity last fall,” Doug Bush told reporters at a March 8 briefing on the fiscal 2025 budget request. “Unfortunately, [it was] not successful enough to go straight into production.”

The new plan — following an “exhaustive” tactical fires study meant to revalidate elements of the extended-range cannon requirement led by Army Futures Command — is to evaluate existing options from industry this summer “to get a sense of the maturity of those systems.”

Of the 24 new Army systems slated to make it into the hands of soldiers by the end of 2023, only the Extended Range Cannon Artillery program missed that goal. The ERCA system uses a service-developed, 58-caliber gun tube mounted on the chassis of a BAE Systems-made Paladin Integrated Management howitzer.

The Army was building 20 prototypes of the ERCA system: two for destructive testing and the remaining 18 for a battalion.

The operational evaluation of ERCA revealed “engineering challenges,” Bush said a year ago. Observations in early testing of prototypes showed excessive wear on the gun tube after firing a relatively low number of rounds.

Army Futures Command leader Gen. James Rainey told Defense News last summer the service was working on a new conventional fires strategy expected by the end of the calendar year. The strategy would determine both capability and capacity of what exists and what the Army may need, Rainey said.

The strategy considered new technology to enhance conventional fires on the battlefield, such as advances in propellant that make it possible for midrange cannons to shoot as far as longer-range systems.

Depending on the artillery strategy’s conclusions, there are a variety of options the service could consider in order to fulfill the Army’s requirement for an extended-range cannon, Bush said.

The Army was able to conduct a variety of successful tests with ERCA prototypes, including hitting a target on the nose 70 kilometers (43 miles) away at Yuma Proving Ground, Arizona, in December 2020 using an Excalibur extended-range guided artillery shell.

The problems with the cannon were mostly related to the length of the gun tube and its ability to withstand a large number of projectiles without excessive wear to the gun tube.

The Army is racing to extend artillery ranges on the battlefield to take away advantages of high-end adversaries like Russia and China. The ERCA weapon was intended to be able to fire at and destroy targets from a position out of the range of enemy systems.

That requirement remains, Bush stressed last week.

The hope now is to find systems that currently exist and are capable. The Army would then choose one for production if it proves promising, Bush said.

“There [are] things people say, and then we need to actually do testing to make sure it’s true,” he explained.

“It’s a shift from developing something new to working with what is available both domestically and internationally to get the range,” he added, “because the fires study validated the range and volume are still needed, so we want to find a different way to get there.”

The Army is asking for $55 million in its FY25 budget to pursue the new effort to find an extended-range cannon capability.

The service also plans to continue developing new munitions it was already working on as part of the ERCA program, Bush noted.


BAE and Rheinmetall are probably dancing in the aisles now...

Link to comment
Share on other sites

  • 2 weeks later...


The one next to the M256 is definitely a XM360.


Note that wire/cable running alongside and over the breech and the three pistons (for, IIRC, a two-stage recoil) on top.


However, the two guns in the group pictures are most likely M35s for the M10. There are bore evacuators (the M35 should also have an internal evacuator fan to resolve that toxic fumes issue the M10 suffered from during trials) and there are barrel shroud clamp assemblies (I assume they're clamps) right behind the muzzles. The XM360 features a pepperpot muzzle brake (even on the AbramsX, which should've been using a XM360E1 since most of the technical legwork for its installation should've already been done, but they still went with the original XM360), but the Booker's M35 doesn't.

Link to comment
Share on other sites

Also, in the picture with the M256 there are two unicorns hiding at the very top behind the GBU-28 Paveway (which, as we know, was partially built out of decommissioned 203mm howitzer barrels from the now-retired M110A2 - hence its presence in the room) and the orange scissor lift:


- Either the 58-caliber XM282 or the 39-caliber XM283 (based on the M198's M199) that were trialed in 1985 for the Howitzer Improvement Program (HIP); there were three guns proposed as part of the Advanced Armament System (AAS): the XM282, the XM283 (both 282 and 283 were fitted onto five M109A3E3 testbeds) and the XM284 (fitted onto four M109A3E2 testbeds). They eventually selected the XM284 for what ultimately became the M109A5. The howitzer gun on this picture looks like the XM283, but with the barrel length, it's more like a L58 XM282 (which had a chamber volume of 27.8L/1,700 cubic inches and could lob M549A1 HERA projectiles up to 45km with the XM224 propellant charge). Also note that they also cut a XM282's barrel down to 52 calibers to test liquid propellants; that L52 could also be the one seen here.


- Right next to it is the L56 XM297 (chamber volume of 1,400 cubic inches) that was installed on the Crusader (which also, at one point, dabbled with liquid props before switching back to solid MACS propellant charges). Easily recognizable with its pepperpot muzzle brake.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...