Question: The Whitianga Festival of Speed (Whitianga FOS) was a motorsport festival held in the seaside town of Whitianga on the Coromandel Peninsula in New Zealand in 2009 and 2010, the festival hosted a multitude of events including which type of rotorcraft in which lift and thrust are supplied by rotors? 
Sentence (from "Whitianga Festival of Speed"): The event was free for spectators.
Relevant evidence: No