Assertion: turbine's compressor | /r/CapableOf | achieve sufficient rotational speed
Facets:
value: for successful ignition
type: PURPOSE
Source sentences:
text: Depending on where in the relight envelope the restart is attempted (that is depending on the aircraft's airspeed and altitude), the procedure may simply rely on the airflow (windmill restart) or require the use of the starter (starter-assisted restart) in order for the compressor to achieve sufficient rotational speed for successful ignition.