Dismounted infantry on foot patrols often are confronted with threats from pressure-plate explosives buried along their intended routes. To counter such threats, a Fredericksburg, Va., company has developed a robot with a mini-flail attachment that can clear a safe walking path for soldiers.
The Protector, made by HDT Robotics, clears a trail at a 3 mph speed. It is powered by diesel, or JP-8, can run for three days on internal fuel. The flail head weighs 212 pounds and clears a 22-inch wide path.
The prime mover in the Protector is 36 inches wide, 30 inches high and 60 inches long, weighs 470 pounds, and can carry a 1,000 pound payload at a maximum speed of 10 mph. It has the ability to climb 40-degree slopes, is operated by a hand-held controller, and can function up to 1,300 feet away from the operator.
Tom Van Doren, chief operating officer of HDT Robotics division, calls trail-clearing a difficult operation and says that robotic technology is the best application for the job “so you have reasonable standoff during an explosive event.”
However, he notes, existing robotic technology has been insufficient for the job in terms of endurance, range, and capability, which led HDT Robotics to develop the Protector mini-flail application.
“Existing Pakbots or Talons that have been deployed have a couple of hours of endurance and don’t have a lot of terrain handling capabilities,” Van Doren says. “They aren’t sufficient platforms to interrupt IEDs. The military needs something that can go down the trail with dismounted troops and disrupt devices.”
The technology HDT Robotics developed was a hammer flail, a proven technology already in use by the U.S. Army.
“The Army already procures the M160 [Anti-personnel Mine Clearing System],” Van Doren observes, “It’s 6-feet wide, weighs more than 10,000 pounds, and can clear a small minefield, but you can’t take it down a path.”
Van Doren says the first operational prototype of the Protector has proven capable in testing and that HDT Robotics was close to entering an agreement with a U.S. governmental agency for further testing and operational assessment.
“Because it can carry 500 pounds on the robot and another 500 pounds on a tow trailer, we think it also has a role as a logistics robot,” Van Doren says. “It’s built to be modular, with the flail as one module and the hydraulic power takeoff as another. The chassis, engine, fuel, and electronics modules all come apart and were designed for mobility so if the troops encounter an obstacle they can’t get across, they can break down the Protector and make it man portable.”
About the author: Alan M. Petrillo is a Tucson, Ariz., freelance writer who works in a wide variety of fields, writing for national and regional magazines and newspapers. He’s also the author of the mystery novel, Full Moon, and several books on historical military small arms.