The Pacer Edge program underway by the U.S. Air Force (USAF) and General Electric (GE) is making steady progress, most recently demonstrated by the opening of a second Reverse Engineering and Critical Tooling (REACT-II) laboratory. The REACT-II lab established by US Air Force Life Cycle Management Center’s (AFLCMC) Propulsion Directorate and Oklahoma City Air Logistics Complex (OC-ALC) will boast two GE Concept Laser metal 3D printers to drive forward the Pacer Edge program.
Pacer Edge and 3D Printing Aircraft Parts
Pacer Edge is a pathfinder program meant to apply additive manufacturing (AM) technology to the operation and maintenance of aircraft, typically in finding ways to produce parts that would otherwise be cast and have a long lead time. This resulted in the 3D printing of a sump cover for the F110 engine used to powder F-15 and F-16 fighter jets, making it the first jet engine part fabricated with metal 3D printing to be qualified by any Department of Defense body. Digital twinning, maintenance-based predictive analysis, and lifecycle management of the sump cover were also explored.
By demonstrating that such a component could be made, the program moved onto items with increased complexity and scale. This included obsolete parts such as a bellcrank, gearbox seat, anti-icing valve body, and a cross shaft arm. In addition to maintaining aircraft with obsolete parts, the Pacer Edge program is able to cut production time by 80 percent.
3D Printing Jet Engine Parts
Now, the work has led to the creation of a second REACT lab at Tinker Air Force Base, with two metal 3D printers from the Pacer Edge program. In particular, the USAF hopes to support engine components.
“The printer will be used for the production of propulsion items such as tooling and engine parts,” said Jason McCurry, Reverse Engineering, and Critical Tooling flight chief. “The biggest impact is the ability to produce parts that are no longer manufactured.”
“The propulsion directorate embraced additive manufacturing because of one big strategic reason and that is to improve propulsion readiness for the warfighter,” said John Sneden, director of Air Force Life Cycle Management Center’s Propulsion Directorate. “Additive manufacturing puts us in the driver’s seat so we can source those low volume hard to get parts at the speed of need.”
At this point, the Pacer Edge program is more or less established and successful, meaning that, when the USAF needs a replacement part, it shouldn’t be too difficult to implement the workflows established thus far. The next step would be continue scaling up facilities, something that GE Aerospace certainly knows a good deal about, given its own massive AM operations for production parts. Meanwhile, other areas of the U.S. military are adopting the technology in a similar manner but based around their own specific needs. This includes the U.S. Navy, which has had a somewhat more delayed foray into 3D printing, but is now exploring the technology in earnest.
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