Defense

March 24, 2014

Benet Labs’ mortar redesign to help infantrymen become more lethal, safer

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John B. Snyder
Watervliet Arsenal, N.Y.

Apache Troop mortarmen fire the first round of the day for their mortar live-fire exercise at Combat Outpost Khilaguy, Afghanistan, Nov. 9, 2013. To properly emplace their system, two Soldiers must stand on the baseplate to help it set firmly in the ground.

The United States infantry has some of the finest mortar systems in the world. They are lightweight, have great range, and provide a significant amount of lethal and destructive fire to close-range combat. And so, why would anyone think about tweaking something that has already been proven very capable in training and in combat?

“It is all about our troops maintaining the competitive edge over potential adversaries,” said Wayland Barber, chief of the Mortars and Recoilless Rifle Branch at BenÈt Laboratories. “Even without funding for new weapons research, Army scientists and engineers are always seeking opportunities to improve weapons systems that are in the field.”

“No sooner than we field a new mortar system, our customers demand that we make it better in regards to extended range, increased lethality or capability, and reduced weight,” said Barber. “This triggers the entire Army research community, from those who improve the lethality of ammunition to those who design the delivery system, to work on parallel and converging fields of science to achieve a common goal.”

Barber supervises a team of 14 Department of the Army civilian engineers and technicians who not only design and build prototypes of future mortar and recoilless systems, they also design product improvements of what has already been fielded. Given today’s fiscal challenges due to sequestration, and the lack of any major orders for new weapon systems, improving what the U.S. military currently has fielded drives Barber and his team’s near-term focus.

Some of the latest work at BenÈt Labs transcends all fielded mortar systems in the U.S. inventory, from 60-mm to 81-mm to 120-mm mortars.

Bob Cooley, a Benét Labs Integrated Process Team leader, adjusting the newly redesigned 120-mm mortar bipod in the product development laboratory at Watervliet Arsenal, N.Y.

“The current 120-mm mortar system has good range, is reliable, and the troops like it,” said Bob Cooley, a BenÈt Labs Integrated Process Team leader. “But as good as that system is, we have several product improvements that we are currently working that may improve Soldiers’ safety, increase range by up to 25 percent, and reduce the system’s weight by nearly 16 percent.”

“One of the major upgrades to the 120-mm system is with its bipod,” Cooley said. “Our bipod redesign will improve the accuracy of the system because it moves the fire control system from the tube to the bipod.”

According to Cooley, the fire control system, or FCS, is currently attached to the tube, which in turn places a significant amount of stress and movement on the FCS during a fire mission. By moving the FCS to the bipod, there will be less force exerted on the system, which in turn will improve accuracy.

Another design improvement for the 120-mm mortar system includes a new baseplate that will not only provide more stability for extended range munitions, it will save U.S. taxpayers money. If and when the redesigned baseplate goes into full production, the cost of the baseplate will be reduced by nearly 50 percent over the current legacy system. The qualification test was recently completed with the firing of 3,000 rounds without incident.

The final piece to the redesigned 120-mm mortar system is an improved cannon tube. When extended range ammunition is developed, the tube must also be modified to withstand higher tube pressure, heat, and muzzle velocity.

BenÈt Labs plans to conduct a full-quality testing of the redesigned 120-mm mortar system in fiscal year 2015, and Barber’s team is also doing research and design work on the 60-mm and the 81-mm mortar systems. News of those potential product improvements will be released in a future story.

Some at BenÈt pride themselves in that they made it (weapon system design), just before they made it better. In essence, this team is never satisfied having met the prescribed technical data standards for product development, because they know that there is an American serviceman or woman whose life will depend on their product. If there is any chance to make our troops more lethal or safer, BenÈt research will discover it.

BenÈt Labs has a rich history of designing and fielding new weapon systems. Although BenÈt officially opened its doors as the Army’s large caliber research and design facility in 1962, its weapons research at the Watervliet Arsenal dates back to the 1840s. Therefore, seeking to improve previously tested and fielded weapon systems is not just a task that the BenÈt’s workforce does when work for new weapon systems dries up, doing continuous product improvement is in their DNA.




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