The APU also produces a low level of thrust, enough to settle floating propellant in the upper-stage tanks before each ignition of the Vinci engine or to make fine adjustments to the rocket's ...

An Auxiliary Propulsion Unit (APU)—essentially a miniature second engine—on the upper stage shut down in the latter portion of the inaugural Ariane 6 flight, after the rocket reached orbit and ...

The rocket performed a flawless launch from Europe ... its altitude due to the failure of an Auxiliary Propulsion Unit (APU), which is used to repressurize the tanks and allow the engine to ...

The rocket's first stage is powered by a single ... This was due to a failure with the auxiliary power unit (APU), a device that pressurizes upper-stage fuel tanks during flight and provides ...

as the Vinci engine in the rocket’s upper stage failed to reignite for a final burn to deorbit the stage. The stage’s auxiliary propulsion unit (APU) did not start up during a long coast phase ...

The rocket’s pair of solid boosters separated ... stream later reported an issue with the Auxiliary Power Unit (APU) which allows the upper stage Vinci engine to reignite*.

The rocket will then deploy eight satellites and ... "The Auxiliary Propulsion Unit (APU) helps here, providing a small but steady amount of thrust to cause fuel in the Vinci tanks to settle ...