Orbital Scrubs Rocket Launch Minutes Before Liftoff

Orbital Sciences Corp. scrubbed the first attempted launch of its new Antares rocket minutes before liftoff after a hose prematurely detached from the booster.

The April 17 liftoff from Wallops Island, Virginia, was set for 5 p.m. local time. It was aborted with slightly more than 10 minutes left in the countdown due to a “premature separation of an umbilical connection,” according to a brief statement from the National Aeronautics and Space Administration. 

The two-stage, medium-lift rocket — the Dulles, Virginia-based company’s newest and biggest — is flying its maiden flight as part of a test mission for NASA.

After retiring its shuttle fleet in 2011, the agency has turned to the private sector and companies such as Orbital and Space Exploration Technologies Corp., known as SpaceX and headed by billionaire Elon Musk, to resupply the International Space Station. Orbital has a $1.9 billion contract with the agency for at least eight cargo missions to the orbital outpost.

The rocket may eventually be a contender for such military programs as the Air Force’s Orbital/Suborbital Program-3, known as OSP-3, and Evolved Expendable Launch Vehicle, known as EELV.

The rocket for its first stage uses two liquid-fuel AJ26 engines, made by Aerojet, part of California-based GenCorp Inc. They’re modified versions of the NK-33s built in Russia more than four decades ago for its moon program, which was later canceled. Aerojet bought about 40 NK-33 engines in the mid-1990s and, under a contract with Orbital, modified them specifically for Antares, according to Aerojet. The second-stage of the rocket uses a solid-fuel engine made by Arlington, Virginia-based Alliant Techsystems Inc.

The launch has been rescheduled for 5 p.m. April 20, at the earliest, according to NASA. A previously scheduled liftoff on April 19 was canceled due to the weather forecast. A back-up date is set for April 21.

About the Author

Brendan McGarry
Brendan McGarry is the managing editor of Military.com. He can be reached at brendan.mcgarry@military.com. Follow him on Twitter at @Brendan_McGarry.

    Hm. Could be worse. The hose could have gone during takeoff. Though all this talk about using an EELV leaves me with the question: What happened to Space X? Last I heard, they weren’t doing bad, in fact, they were having successes.

    • Ben

      For whatever reason, DT likes to ignore SpaceX. In short: they’re way ahead of the pack.

  • Ricardo

    Dolt, the hose is supposed to disconnect at the moment of liftoff. Several contractors are providing launch services to NASA, including Orbital and Space-X, it’s called a free market. Go home to your mommy.


      Nice language. Maybe you need to read the article again. That is, that a hose pump that didn’t need to come off at that moment did just that. Free market? Yes, yes it. But DT isn’t covering the leader of these free marketeers, that is, Space X.

      • oblatt1

        if captain kirk was as a hamster this what he would sound like

  • NavyGuy2007

    Orbital is just here to fill in a hole left when another company failed to meat design goals in the earlier stages of the COTS program. SpaceX/Falcon9 is already delevering cargo, AND doing it cheeper then the Orbital/Antares stack has been quoted.

  • Host Guy

    Whoops! Heh heh… forgot to screw that one on all the way! Sorry guys!