Engine Replacement Delays Antares ISS Mission

By Frank Morring, Jr.
Source: Aerospace Daily & Defense Report

Data analysis from the April 21 inaugural Antares flight found its propulsion, guidance/navigation, attitude control, other flight systems and ground control systems “all performed as designed,” Orbital reported Monday.

Instruments on the Cygnus mass simulator the rocket sent into orbit “confirmed Orbital’s engineering models that predicted a benign launch environment for Cygnus and other future satellite payloads in terms of accelerations, vibrations, acoustics, thermal and other measurements captured during the flight,” Orbital said.

The Antares uses twin AJ26s to power a kerosene-fueled first stage built by Yuzhnoye of the Ukraine, with an ATK Castor 30 as the solid-fuel upper stage. The Cygnus cargo capsule is built by Thales Alenia Space in Turin, Italy, while Orbital builds the Cygnus service module at its satellite manufacturing facility in Dulles.


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