Only one of many competitors: https://www.rolls-royce.com/media/press-releases/2019/06-11-19-rr-announces-new-hybrid-electric-flight-demonstrator-to-be-built-wi

Only one of many competitors: https://www.rolls-royce.com/media/press-releases/2019/06-11-19-rr-announces-new-hybrid-electric-flight-demonstrator-to-be-built-with-brandenburg-partners.aspx https://www.rolls-royce.com/media/press-releases/2019/06-11-...