Operations in the Horizontal Integration Facility (HIF) at NASA’s Wallops Flight Facility where Orbital ATK assembles and tests its Antares medium-class rocket are in full force as the team preps the upgraded vehicle for its upcoming “hot fire” test in early 2016. The hot fire test will utilize an Antares first stage with its new RD-181 engines to verify the vehicle’s performance and its compatibility with the launch pad, and will certify the system for flight. During the test, Antares will fire its engines at 100% thrust. Following a successful hot fire test, Antares launches are slated to resume next year for Orbital ATK’s Commercial Resupply Services (CRS) missions to deliver cargo and supplies to the International Space Station (ISS) for NASA.

All major components of the Antares hot fire test vehicle are at Wallops, including the two all-new RD-181 engines that will power the launch vehicle.  The RD-181 engines completed certification and acceptance testing prior to arriving at the HIF, and now the team is busy assembling the test vehicle and verifying its systems. 

“We have the engines and other major subsystems installed and are preparing to begin integrated testing of the first stage,” said Mike Pinkston, Orbital ATK Vice President and Antares General Manager. “We have seen incredible dedication by our team to hit our milestones, enabling us to remain on schedule to support our mission of delivering vital supplies to the crews aboard the space station.”

In order to accommodate the RD-181 engines, several modifications were made to the Antares vehicle design.  Upgrades completed and installed over the summer include a newly-developed and qualified thrust adapter structure, modifications to the first stage core propellant tanks, modified engine control avionics and new propellant feedlines.

In addition to the work being conducted for the hot fire test, the team is also receiving hardware for the full Antares rocket that will be used for its return to flight in the spring of 2016.  The crew will be assembling that vehicle in parallel with the hot fire test vehicle.  The next set of Antares engines recently completed acceptance testing and is scheduled to arrive at Wallops in December.

“These new engines are robust, flight-heritage powerhouses that provide Antares with extra performance to lift more cargo to the ISS for NASA,” said Pinkston. “It is great to be in full integration operations, performing pad testing and working towards our next launch.”

The Virginia Spaceflight Authority completed repairs to Pad 0A at the Mid-Atlantic Regional Spaceport (MARS) at the end of September and is finishing performance testing of the new systems that were installed to support the upgraded Antares. Testing and certification of the launch pad is set to be completed this month.

Orbital ATK Antares engineers and technicians are in full operations at the Horizontal Integration Facility (HIF) at Wallops Flight Facility preparing the vehicle for testing and resumption of flight operations. Photo Credit: Mike Brainard/Orbital ATK


All major components of Antares are in place and undergoing launch vehicle integration at Orbital ATK’s Horizontal Integration Facility at NASA’s Wallops Flight Facility. Photo credit Patrick Black/NASA



The new RD-181 engines are installed on the Antares vehicle ready to support a full power hot fire test at the pad in first quarter 2016. Photo credit Patrick Black/NASA


Virginia Space has completed the repairs of the MARS Launch Pad-0A, located on NASA’s Wallops Flight Facility and is currently completing performance testing. Photo Credit: Orbital ATK