 Remarkably for a newly developed system, all of the first four launches attempted launched were partly successful, the only failure occurring on the second launch when the payload was inserted into a lower orbit than planned.It possessed a first stage of 10 m, 1.4 metres in diameter, and a weight of 14.7 metric tons.Their engines of the type LRBA Vexin supplied a thrust of 269 kN for 93 seconds.