The defense stock experienced a surge in orders that significantly increased its backlog.AeroVironment's (AVAV 2.04%) stock soared 30.5% in September, according to data provided by S&P Global Market Intelligence. The defense robotics and autonomous systems company delivered a strong quarterly earnings report, raised its earnings guidance, and signaled a strong trend in its growth trajectory. AeroVironment had an eventful SeptemberAeroVironment reported its first-quarter results (quarter-end Aug. 2) in early ...