Home Air Taxi, UAM/AAM USAF Aims To Accelerate eVTOL Maturity USAF Aims To Accelerate eVTOL Maturity 10 Jan 2020 | Air Taxi, UAM/AAMeVTOLMilitaryUAM/AAM USAF Aims To Accelerate eVTOL Maturity | Aviation Week Network U.S. Air Force is seeking information on commercial eVTOL vehicles that could be fielded within three years.