JAXA reveals cause of Epsilon rocket failure
Japan’s space agency JAXA yesterday announced the results of its investigation into the launch failure of its Epsilon rocket on October 12, 2022, pinpointing the cause to the attitude control system in the solid-fueled second stage.
After the launch of the three-stage solid-propellant rocket, the first-stage rocket engine worked normally and was detached as scheduled. The second-stage engine showed no combustion problem, but an abnormal attitude was confirmed immediately after the engine used up its fuel, JAXA told a science ministry meeting.
The attitude was off to the lower right by some 21 degrees more than planned, according to JAXA. The space agency judged that the rocket could not enter Earth orbit and sent a self-destruction signal to the rocket 6 minutes and 28 seconds after liftoff.
Analyses of flight and other data showed that one function of a reaction control system, which uses thrusters to control attitude and other factors, did not work after the combustion of the second-stage engine, according to JAXA.
Epsilon is Japan’s attempt to produce a low cost rocket, though it has only launched a handful of times since its first launch in 2013, suggesting it has not been attracting many customers.
Japan’s space agency JAXA yesterday announced the results of its investigation into the launch failure of its Epsilon rocket on October 12, 2022, pinpointing the cause to the attitude control system in the solid-fueled second stage.
After the launch of the three-stage solid-propellant rocket, the first-stage rocket engine worked normally and was detached as scheduled. The second-stage engine showed no combustion problem, but an abnormal attitude was confirmed immediately after the engine used up its fuel, JAXA told a science ministry meeting.
The attitude was off to the lower right by some 21 degrees more than planned, according to JAXA. The space agency judged that the rocket could not enter Earth orbit and sent a self-destruction signal to the rocket 6 minutes and 28 seconds after liftoff.
Analyses of flight and other data showed that one function of a reaction control system, which uses thrusters to control attitude and other factors, did not work after the combustion of the second-stage engine, according to JAXA.
Epsilon is Japan’s attempt to produce a low cost rocket, though it has only launched a handful of times since its first launch in 2013, suggesting it has not been attracting many customers.