Aerojet Rocketdyne to Develop Advanced Propulsion System for U.S. Navy’s MK 54 MOD 2 Advanced Lightweight Torpedo

Aerojet Rocketdyne has been awarded a $63.2 million Other Transaction Authority (OTA) contract by the U.S. Navy to develop an advanced propulsion system for the MK 54 MOD 2 Advanced Lightweight Torpedo (ALWT).

“We have developed mission-critical propulsion and power systems for the U.S. Navy for more than 60 years,” said Eileen Drake, Aerojet Rocketdyne CEO and president. “Aerojet Rocketdyne is a world-class developer of high-performance propulsion systems and we look forward to applying our expertise to support the development of the Advanced Lightweight Torpedo.”

For the Authority, Aerojet Rocketdyne will develop a prototype Stored Chemical Energy Propulsion System (SCEPS) power plant and afterbody/tailcone which would ultimately be integrated into the ALWT. The SCEPS improves the capabilities of the MK 54 torpedo.

The Mark 54 Lightweight Torpedo (formerly known as Lightweight Hybrid Torpedo, or LHT) is a standard 12.75 inch (324 mm) anti-submarine warfare (ASW) torpedo used by the U.S. Navy. The torpedo can be launched by surface ships, fixed-wing aircraft, and helicopters.

The MK 54 Mod 2 will have a new propulsion system and warhead. The MK 54 Mod 2 will not compatible with the current VLA (vertical launched) or HAAWC (High Altitude ASW Weapon Capability) systems. HAAWC provides an adapter wing-kit that allows aircrews to drop an MK 54 from a P-8A Multi-mission Maritime Aircraft from higher than traditional altitudes. The wing-kit glides the MK 54 to a water entry point directed by the P-8A combat system.

The MK 54 Mod 2 is expected to deliver in FY26.

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