Japan’s IHI Aerospace is cooperating with the U.S. Air Force as it investigates the failure of its first Advanced Extremely High-Frequency (AEHF) satellite to reach orbit after an Aug. 14 launch, according to U.S. government sources. IHI made the satellite’s model BT-4 liquid apogee engine (LAE). The engine failed during two firing attempts to raise the spacecraft’s orbit shortly after launch. Air Force officials are now in the midst of a new effort to get the satellite into ...

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