M1299 howitzer explained

M1299
Origin:	United States
Type:	Self-propelled howitzer
Design Date:	2019-2024
Manufacturer:	BAE Systems
Is Vehicle:	yes
Is Ranged:	yes
Is Artillery:	yes
Rate:	3 rpm (10 with autoloader)
Range:	(rocket-assisted round) (XM1155 round)
Traverse:	360°
Suspension:	torsion bar
Primary Armament:	155 mm L/58 XM907 gun
Engine:	Cummins diesel
Crew:	4 (driver, loader, gunner, commander)
Engine Power:	600hp

The M1299 Howitzer was an American prototype 155 mm self-propelled howitzer developed by BAE Systems beginning in 2019 under the Extended Range Cannon Artillery (ERCA) program. It was based on the M109A7 howitzer and was primarily designed for the purpose of improving the M109's effective range. The program was canceled in 2024.

History

The Extended Range Cannon Artillery program was designed to produce a self-propelled howitzer system with an improved range and rate of fire compared to the existing M109A7 Howitzer, in response to developments of Russian and Chinese artillery systems, which had become capable of outranging American systems.^[1]

During tests conducted in 2018, the M777 howitzer was able to double its range through the use of higher energy propellant and rocket-assisted projectiles, hitting targets over 37mile away. Using the same principles, the Extended Range Cannon Artillery was developed.^[2] BAE Systems was given a $45 million contract in 2019 to incorporate the ERCA's cannon into a M109 chassis,^[3] which was unveiled at that year's Association for the United States Army.^[4]

Increased range and accuracy was accomplished by having a longer barrel, at 58 calibers long, and by using the XM1113 rocket-assisted artillery shell. In 2020, the ERCA successfully hit a target 43miles away, which is over twice the range typically achieved by an M777 using the same round.^{[5] [6] [7] [8]}

According to the United States Army, the howitzer was to be completed in 2021 and undergo operational assessment in 2023.^[9] Due to issues with excessive wear on its barrel, the project was canceled in 2024.^{[10] [11]}

Design

Gun system

The M1299 was armed with a new 155 mm L/58 caliber long, 9.1 m gun tube, XM907 gun, designed by Benét Laboratories to fire the XM1113 rocket-assisted round. This would give a range of over 70km (40miles) – much greater than the 38km (24miles) of the M109A7 Paladin. An autoloader was planned to allow rates of fire of up to 10 rounds per minute.^[12] Originally the autoloader was planned to carry 31 rounds and be in service by 2024. As designed, it was too large for the vehicle, so it was reduced to a 23-round capacity for better weight, center of gravity, and "onboard kills".^{[13] [14]}

In December 2022, the XM907E2 cannon fired an XM1155 sub-caliber projectile out to . The shell was intended to hit long-range targets that previously would require the use of more expensive missiles.^{[15] [16]}

See also

• XM2001 Crusader, a U.S. Army self-propelled howitzer canceled in 2002
• XM1203 Non-Line-of-Sight Cannon, a U.S. Army self-propelled howitzer of the Future Combat Systems Manned Ground Vehicles program canceled in 2009
• Panzerhaubitze 2000, the self-propelled howitzer of the German army
• K9 Thunder, the self-propelled howitzer of the Korean Armed Forces
• Next Generation Combat Vehicle, an on-going U.S. Army combat vehicle acquisition program
• AHS Krab, self-propelled howitzer designed in Poland
• T-155 Fırtına self-propelled howitzer designed in Turkey
• AS-90 self-propelled howitzer designed in UK
• 2S35 Koalitsiya-SV self-propelled howitzer designed in Russia
• PLZ-05 self-propelled howitzer designed in China
• SSPH Primus self-propelled howitzer designed in Singapore
• Type 99 155 mm self-propelled howitzer self-propelled howitzer designed in Japan

Notes and References

1. Web site: Pickrell . Ryan . 9 October 2018 . Army Futures Command Chief: Russia and China Are Eating Our Long-Range Lunch . live . https://web.archive.org/web/20230929000745/https://taskandpurpose.com/news/army-long-range-weapons-russia-china/ . 29 September 2023 . Task and Purpose.
2. Web site: Judson . Jen . 6 June 2020 . US Army takes 40-mile shots from extended-range cannon in demo . live . https://archive.today/20200405165212/https://www.defensenews.com/land/2020/03/06/army-takes-40-mile-shots-from-extended-range-cannon-in-demo/ . 5 April 2020 . Defense News.
3. Web site: Keller . Jared . 10 March 2020 . Watch the Army's new supergun hit a target from 40 miles away . live . https://web.archive.org/web/20230501084416/https://www.businessinsider.com/watch-army-extended-range-cannon-artillery-hit-40-miles-away-2020-3?r=US&IR=T . 1 May 2023 . Business Insider.
4. Web site: 16 October 2019 . Video: Check out BAE's giant ERCA cannon . Defense News.
5. Web site: Wozniak . Jakub . 24 December 2020 . New Army Extended Range Cannon Hits Target 43 Miles Away . live . https://web.archive.org/web/20230429155314/https://www.overtdefense.com/2020/12/24/new-army-extended-range-cannon-hits-target-43-miles-away/ . 29 April 2023 . Overt Defense.
6. News: Evans . Michael . 24 December 2020 . US army supergun breaks record with direct hit on target 70 km away . subscription . The Times.
7. Web site: Osborn . Kris . 23 July 2020 . The U.S. Army's New Artillery Can Kill from 40 Miles Away . live . https://web.archive.org/web/20230930202927/https://nationalinterest.org/blog/buzz/us-armys-new-artillery-can-kill-40-miles-away-165390 . 30 September 2023 . National Interest.
8. Web site: Osborn . Kris . 2021-10-03 . The Army Wants Artillery Rounds That Can Change Direction Mid-Flight . live . https://web.archive.org/web/20230927125556/https://nationalinterest.org/blog/reboot/army-wants-artillery-rounds-can-change-direction-mid-flight-194626 . 27 September 2023 . 2023-07-26 . National Interest.
9. Web site: Vandiver . John . 23 December 2020 . New Army cannon hits target 43 miles away in test . live . https://web.archive.org/web/20231020214140/https://www.stripes.com/theaters/us/new-army-cannon-hits-target-43-miles-away-in-test-1.656176 . 20 October 2023 . Stars & Stripes.
10. Web site: Judson . Jen . 2024-03-11 . US Army scraps Extended Range Cannon Artillery prototype effort . 2024-03-12 . Defense News . en.
11. Sébastien . Roblin . 2024-03-21 . The Army's Long-Range Howitzer Has Met Its Achilles Heel . 2024-03-21 . Popular Mechanics . en-US.
12. Web site: Freedberg Jr . Sydney J. . 2020-03-06 . New Army Cannon Doubles Range; Ramjet Ammo May Be Next . live . https://web.archive.org/web/20221226024357/https://breakingdefense.com/2020/03/new-army-cannon-doubles-range/ . 2022-12-26 . 2020-03-25 . Breaking Defense . en-US.
13. Web site: Roque. Ashley. 23 April 2021. US Army opting for 23-round autoloader for ERCA. 27 April 2021. Jane's Information Group. https://web.archive.org/web/20210428022321/https://www.janes.com/defence-news/news-detail/us-army-opting-for-23-round-autoloader-for-erca. 28 April 2021. live.
14. Web site: Freedberg Jr . Sydney J. . 16 April 2021 . ERCA: Army Contracts To Help New Cannon ‘Fire Faster’ . live . https://web.archive.org/web/20231005155001/https://breakingdefense.com/2021/04/erca-army-contracts-to-help-new-cannon-fire-faster/ . 5 October 2023 . Breaking Defense.
15. Web site: Skove . Sam . 29 March 2023 . New Artillery Round Shoots Farther Than Some Missiles, Can Hit Moving Targets . live . https://web.archive.org/web/20231010012055/https://www.defenseone.com/business/2023/03/new-artillery-round-shoots-farther-some-missiles-can-hit-moving-targets/384601/ . 10 October 2023 . Defense One.
16. Web site: Szondy . David . 29 March 2023 . BAE Systems successfully tests artillery shell with double the range . live . https://web.archive.org/web/20230608063521/https://newatlas.com/military/bae-systems-successfully-tests-artillery-shell-range/ . 8 June 2023 . New Atlas.