ALTM1 Static test 2
Static test #2 fire of the Aluminium Test Motor 1 is another failure.
Suspected causes: Blocked grain or blocked nozzle due to a failed igniter
still stuck in the grain.
Rear bulkhead shear bolt shears nicely, and the motor itself becomes a projectile.
The "ping" sound towards the end of the video segment is the motor casing coming back down to ground.