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The Heartbeat of Innovation
by Bryan Warren for NGC News
Washington DC (SPX) Jul 24, 2020

Northrop Grumman manufactures an OmegA rocket composite fairing using its one-of-a-kind Dockable Gantry System. Photo credit: Northrop Grumman

New innovative products breed new innovative production processes. Nowhere is that more prevalent than at Northrop Grumman. Designing, developing and manufacturing unique aircraft is in the company's DNA. Therefore, it was only natural for Northrop Grumman to apply its innovative manufacturing genes to its new intermediate/heavy-class rocket, OmegATM.

Northrop Grumman is developing OmegA to support National Security Space Launch for the U.S. Space Force. For large, complex OmegA parts, the company looked to a facility with a long heritage of using innovative manufacturing techniques to produce large-scale composite rocket structures - the Northrop Grumman Large Structures Center of Excellence in Iuka, Mississippi.

"The Iuka facility has a rich 20-year history of manufacturing composite rocket structures for Northrop Grumman's Antares and Pegasus rockets, as well as United Launch Alliance's Delta IV and Atlas V launch vehicles," said Wendy Williams, vice president, aerospace structures, Northrop Grumman. Iuka employees have manufactured more than 684 structures, including 438 that have successfully flown to space.

Large rocket parts built in Iuka are very complex. They include nose cones, interstages (connecting sections between the rocket stages that measure up to eighteen feet in diameter) and other large composite structures. For nearly two decades, the team in Iuka has been building large complex launch structures on an in-house designed and built Automated Fiber Placement (AFP) machine. Designated FPM6, this machine has been building large rocket parts since the early 2000s.

The team in Iuka recently upgraded FPM6 to make it more capable for manufacturing OmegA parts like the Payload Adapter Fitting, which is a complex OmegA composite part; the 2/3 Interstage, which at approximately 25 feet long and 17 0.5 feet in diameter will be the largest single-piece composite part built for OmegA; and the 1/2 Interstage.

True to the company's heartbeat and heritage, Northrop Grumman recently developed another industry-first innovation, the Dockable Gantry System (DGS). The task of building the largest, most complex composite rocket parts in the world, required the design and development of this one-of-a-kind machine.

The DGS combines the strengths of AFP machines, which have low scrap rates and the ability to make parts with complex contours due to the steering of individual tows, with those of automated tape laying machines, which experience less downtime due to simpler mechanisms and controls. The DGS manufactures the OmegA five-meter fairing.

All the large composite OmegA structures made in Iuka will join parts from other states for OmegA final assembly at the launch site, NASA's Kennedy Space Center in Florida.

Northrop Grumman's Chandler, Arizona, facility manufactures the rocket's thermal protection, flight systems and avionics. The first and second stage motors are built at Northrop Grumman's Promontory, Utah facility, and the strap on boosters in Magna, Utah.

Cryostage manufacturing is taking place at NASA's Michoud Assembly Facility in Louisiana, and Aerojet Rocketdyne's facility in West Palm, Florida, supplies the upper-stage RL-10 engine.

Pathfinder activities begin in Florida this fall, and then the OmegA team will begin integrating the first flight vehicle. The rocket's first mission remains on track for launch in the spring of 2021.

Related Links
Northrop Grumman
Rocket Science News at Space-Travel.Com

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