Falcon 9 Rocket

SpaceX Replaced Faulty Engine Valve on Private Rocket

SpaceX engineers have replaced a faulty engine valve on a private rocket carrying the

first commercial spacex capsule bound for the International Space Station following the last-second abort during an attempted liftoff on May 19 (Saturday). The valve replacement came after SpaceX ‘s Falcon 9 rocket, which will loft the firm’s unmanned Dragon capsule toward the station, aborted its launch attempt a half-second before liftoff from a pad here at Cape Canaveral Air Force Station. Technicians investigating the glitch discovered a faulty check valve was to blame for the high engine pressure that forced the booster’s engines to unexpectedly shut down. SpaceX engineers replaced the balky valve late Saturday, and are now inspecting the Falcon 9 rocket in preparation for a possible second launch attempt early on May 22 (Tuesday). Dragon is set to become the first non-governmental spaceship to rendezvous and berth at the space station during a mission sponsored by NASA’s COTS program (Commercial Orbital Transportation Services) aimed at procuring commercial U.S. vehicles capable of filling the gap left by the retired space shuttles. The robotic Dragon capsule is due to deliver food, clothes, science equipment and other supplies to the space station when it arrives. The mission is the final test flight scheduled for SpaceX before it can begin running regular delivery missions to the outpost. The company is contracted to fly at least 12 of these for NASA at a total price tag of $1.6 billion.
source:www.space.com