Formula: {ISR_Speed_xi == Minimum_Speed_Butterfly}

~ the speed of Xi while it is doing intelligence, surveillance and reconnaissance

~ Xi records videos and shoots still photos flying slowly
~ this is the speed when Xi can concentrate to acquire data using it's cameras and sensors
~ at the same time Xi has to navigate and avoid obstacles
~ building structure of energy facilities such as oil & gas refineries, nuclear power plant sets challenges
~ Xi may have to accelarate and to rapidly change it's altitude
~ cameras, sensors, hardware and software are tuned specially ISR flights

catch ~ISR_Speed_XCopter ~Xi!