Mack Defense has partnered with BAE Systems to provide an electric drive system for testing on the US Army’s CTT programme. Credit: Mack Defense

US-based Mack Defense is teaming with BAE Systems to deliver “alternative propulsion solution” – effectively an electric drive system – for the CTT prototype vehicles to the US Army for testing.

The move is intended to reduce fuel demand among US Army vehicles, with the US Army instructing industry to “provide solutions to maximise operational efficiency” of the CTT in areas such as fuel demand reduction, ahead of the determination of the programme’s final requirements, stated David Hartzell, president of Mack Defense in a 12 December release.

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To this end, BAE Systems supplied its Gen3 propulsion and accessories power management systems to Mack Defense for integration on the CTT truck variants. The Gen3 includes an electric motor/generator and power electronics to create an alternative power method for military vehicles.

BAE Systems has fielded similar systems to other Volvo Group companies, and Mack Defense has been able to leverage this experience and apply it to the CTT programme, the company stated.

The prototypes will be tested to determine the final requirements for the next generation of trucks to begin modernisation and replacement of the US Army’s fleet of approximately 35,000 heavy tactical trucks, which perform a wide range of combat logistics, support, and service support missions.

Mack Defense received a prototype contract for the first phase in the US Army’s CTT programme in January 2023, along with a Rheinmetall-GM Defense team, Oshkosh Defense, and Navistar Defense, who will all compete for the selection of the service’s next logistics truck.

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The final decision is expected by fiscal year 2026.