On March 13, 2010, the first stage engines successfully underwent a 3.5 second static test firing, having failed a previous attempt the day before.

Among other things, the efficiency of the stage 4 engine will be improved in this version.

The first engine completed was Zefiro 9, the third stage engine.

After the first stage engine failed, and the rocket began to fall back to earth, it was destroyed by range safety.

The rest of the launch vehicle continues flight with its core or upper stage engines.

The first stage engines shut off 228 seconds after lift-off.

Initial indications are that the rocket's first stage engine was intentionally shut down after the vehicle went out of control.

The launch was lost after the first stage engine shut down prematurely.

The buildings also held extra stage engines and the interstages.

The aim of this programme is to develop new more powerful first stage engine.