Multifunctional utility/logistics and equipment vehicle

Lore & Background

The MULE originated from a $5.5 million, 18-month contract awarded in July 2002, when the Department of Defense selected Boeing Integrated Defense Systems to prototype a six-wheeled vehicle then called 'Stinger'. Boeing's partner, Carnegie Mellon University's National Robotics Engineering Consortium, anticipated the armed vehicle could be fielded by 2008. The vehicle later became known as the Multifunctional Utility/Logistics and Equipment Vehicle, with Lockheed Martin as the developer.

The MULE's centerpiece was the Common Mobility Platform (CMP) chassis, which provided mobility through an advanced propulsion and articulated suspension system. Its unique 6x6 independent articulated suspension, coupled with in-hub motors powering each wheel, allowed it to negotiate complex terrain, obstacles, and gaps that a dismounted squad would encounter. It could climb at least a 1-meter step, traverse side slopes greater than 40 percent, ford water to depths over 0.5 meters, and overpass obstacles as high as 0.5 meters, while compensating for varying payload weights and center of gravity locations.

Three variants were planned: the XM1217 transport (canceled in December 2009), the XM1218 countermine (canceled in December 2009), and the XM1219 ARV-assault-light (canceled in July 2011). The ARV-A-L would have featured an integrated weapons and reconnaissance, surveillance, and target acquisition package, supporting both anti-tank and anti-personnel weapons platforms remotely operated by network-linked soldiers.

Reader's Guide

The MULE program represents a significant chapter in the development of autonomous unmanned ground combat vehicles for the United States Army. Its cancellation in stages—first the transport and countermine variants in December 2009, then the armed reconnaissance variant in July 2011—marked the end of a major effort within the Future Combat Systems and BCT modernization programs. The vehicle's advanced 6x6 independent articulated suspension and in-hub motors demonstrated extreme mobility in complex terrain, far exceeding conventional suspension systems. The MULE was designed to support dismounted infantry by hauling equipment, detecting and neutralizing mines, or providing reconnaissance and fire support. Although none of the variants entered service, the technologies developed—particularly the Common Mobility Platform chassis and the suspension system—informed subsequent unmanned ground vehicle research. The program's timeline, from the initial 2002 contract to the final cancellation in 2011, reflects the shifting priorities and budget constraints that affected the Army's modernization efforts during that period.

Did You Know?

• The XM1217 transport variant would have hauled 860 to 1090 kg of equipment.
• The XM1218 countermine variant would have used the ground standoff mine detection system (GSTAMIDS).