Complex sentence: The revolutionary turbine propulsion, in addition to giving the Wessex a larger load capacity, was quieter and generated less vibration, the latter quality was highly beneficial when treating casualties during flight; the Gazelle engine allowed for rapid starting and thus faster response times.
Split into simpler sentences: The revolutionary turbine propulsion, in addition to giving the Wessex a larger load capacity, was quieter and generated less vibration, the latter quality being highly beneficial when treating casualties during flight. The Gazelle engine allowed for rapid starting and thus faster response times.