Orbital Sciences Corp. plans to reengine its Antares launch vehicle and use one or two alternate launch vehicles initially to meet its International Space Station resupply commitments to NASA after last week’s launch failure with an Antares powered by two Aerojet Rocketdyne AJ-26 engines. David Thompson, Orbital chairman and CEO, told analysts Wednesday the surplus Russian-built engines have a “fundamental reliability issue” and probably were responsible for the Oct. 28 ...

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