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Boeing and Nammo successfully test Ramjet 155 long-range artillery weapon

Boeing [BA] and Norwegian defense company Nammo announced a successful test of their Ramjet 155 projectile weapon, which the two companies developed for the Army’s program to find new long-range artillery solutions.

During the June 28 test at the Andøya test center in Norway, Boeing and Nammo said the Ramjet 155 weapon was fired from a cannon, with the ramjet successfully igniting and achieving flight stability “with a well-controlled engine combustion process”.

Boeing and Nammo’s Ramjet 155. Photo: Boeing.

“We have great confidence in the ramjet concept,” Nammo CEO Morten Brandtzæg said in a statement. “The test – with every aspect of the gun firing, to the projectile body, fins and trajectory working flawlessly – represents a true breakthrough in artillery technology and a major success for Boeing, Nammo and the U.S. military.”

The Army selected the team from Boeing and Nammo’s Phantom Works prototyping division to work on the development and maturation of their Ramjet 155 solution in July 2019 under the award-winning XM1155 program. follow-up last May for a second phase focused on other technologies. development.

“The Ramjet 155 uses an engine in which air drawn in for combustion is compressed solely by the forward motion of the projectile at supersonic speeds,” Boeing wrote in a statement. “Considered as a hybrid between guided artillery and missiles, the program aims for a common round design that can be used in the L39 and L58 guns.”

The XM1155 program aims to develop new ramjet ammunition for the army’s future ERCA (Extended Range Cannon Artillery) system.

The ERCA is the Army’s effort to deploy a new 30-foot 58-caliber gun tube on BAE systems‘ M109A7 self-propelled howitzer chassis in 2025, designed to hit targets up to 70 kilometers away at a rate of six to 10 rounds per minute.

Boeing and Nammo said the recent long-range flight test with the Ramjet 155 followed years of research and development to include more than 450 static or short-range tests.

“We believe the Boeing Ramjet 155, with continued technology maturation and testing, can help the U.S. military meet its long-range sniper modernization priorities,” said Steve Nordlund, vice president and director. general of Boeing Phantom Works, in a statement.

The two companies said work is continuing to develop and mature the Ramjet 155, with additional testing and demonstrations planned for the coming months.