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Northrop Grumman builds US Navy very lightweight torpedoes

Northrop Grumman’s Very Lightweight Torpedo prototype being prepared next to its Acoustic Test Facility tank in Annapolis, Maryland (Source Northrop Grumman)

Northrop Grumman has successfully manufactured and tested the first industry-built Very Lightweight Torpedo (VLWT) for the US Navy. The prototype torpedo is based on the Pennsylvania State University Applied Research Laboratory’s (PSU-ARL) design that was distributed to defence industrial manufacturers in 2016.

Northrop Grumman has successfully manufactured and tested the first industry-built Very Lightweight Torpedo (VLWT) for the US Navy. The prototype torpedo is based on the Pennsylvania State University Applied Research Laboratory’s (PSU-ARL) design that was distributed to defence industrial manufacturers in 2016.

Northrop Grumman independently funded the research and development and will offer the design-for-affordability improvements to this VLWT as Northrop Grumman’s response for the Navy’s Compact Rapid Attack Weapon program.

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Northrop Grumman‘s torpedo design and production legacy reaches back over 80 years to World War II through its Westinghouse acquisition.

In 1943, Westinghouse won the Navy contract to reverse engineer a captured German electric torpedo and in 12 months began producing the MK18 electric torpedo, which turned the tide of the undersea warfare in the Pacific.

Northrop Grumman has been at the forefront of torpedo design and production ever since, to include the current MK48 Common Broadband Advanced Sonar System (CBASS) heavyweight torpedo and MK50 Lightweight Torpedo.

David Portner, lead torpedo program manager, undersea systems, Northrop Grumman, said, “The successful testing of the torpedo nose on the first try is a testament to Northrop Grumman’s design-for-affordability approach, which will significantly reduce cost without sacrificing operational performance.”

Applying its engineering and manufacturing expertise, Northrop Grumman improved upon the VLWT baseline design to replace high-cost components and drive overall affordability, reproducibility and reliability.

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Those altered sections were built and tested using PSU-ARL’s own test equipment for confidence.

Northrop Grumman assembled the prototype VLWT using a stored chemical energy propulsion system manufactured by teammate Barber-Nichols, Inc (BNI) of Denver, Colorado.

“The nation needs advanced undersea warfare capabilities now more than ever. We are ready to support fielding the VLWT, which will increase subsea lethality and enable innovative concepts of operations for multiple warfighting platforms,” said Alan Lytle, vice president, undersea systems, Northrop Grumman. 

Northrop Grumman’s manufacturing plan would span the country by building components in California, Utah, Minnesota, Colorado, West Virginia and Maryland.

Northrop Grumman builds US Navy very lightweight torpedoes
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