Comments on: 4Scight is better than hindsight: A decade of autonomous electric VTOL UAV development and commercialization http://sustainableaviation.org/sas2016/session/4scight-better-hindsight-decade-autonomous-electric-vtol-uav-development-commercialization/ Sustainable Aviation Symposium Sun, 25 Feb 2018 08:00:46 +0000 hourly 1 https://wordpress.org/?v=4.8.1