Un hélicoptère à motorisation hybride chez Airbus en 2020 https://www.flyer.co.uk/airbus-to-develop-hybrid-power-helicopter/ The project, co-financed by the French Ministry for Transport (DGAC), will develop an electric backup system to power the…
Solarstratos http://psk.blog.24heures.ch/archive/2017/05/05/premier-vol-d-essai-pour-solarstratos-863583.html https://www.solarstratos.com/…