The Federal Aviation Administration is investigating after a Velocity V-Twin crashed shortly after departing Nashua Airport and came to rest upside down in a snow bank in the Cannongate Condominiums parking lot at about 2:10 p.m.The lone pilot, who was conscious and spoke to officers before being taken to hospital, struck trees and a condominium roof before the aircraft was substantially damaged, and Chris Lynch of the Nashua Airport Authority and John Cinelli of the Nashua Police said no one on the ground was hurt.