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" ... Russia’s Fixar drone is designed for the sweet spot between quadcopters and fixed-wing aircraft. With rotors set at an angle and wings for efficiency, it can take off and land vertically, while still offering endurance over distance. Fixar went on sale in Russia this September, with a plan for foreign exports by the end of the year. ... "
" ... The showcase of technology at AUSA indicates that the energy requirements for the soldier will continue to increase. This trend is necessary, as enemy forces have access to a broad range of commercial electronics, and typically electronics are required to fight electronics. Take for example, in 2017, ISIS forces used commercial quadcopters to drop grenades on Coalition forces. The Army countered the ISIS drones with a “cyber rifle” which sends a signal to the quadcopter that causes it to lose its command link. Though useful, this technology would result in soldiers having to carry even more batteries. ... "
" ... There are many misconceptions surrounding quadcopters and multirotors. The single main reason that they are popular for small drones is mechanical simplicity. It's worth pointing out that a quadcopter is LESS stable than an equivalent regular helicopter (and I'll explain why in a sec), and is also LESS efficient than an equivalent regular helicopter. I will cover the advantage of more mechanical simplicity and the disadvantages of lower efficiency and stability of quadcopters versus conventional helicopters. ... "
" ... “Everyone makes quadcopters because they’re easy to manufacture and easy to design. They’re also easy for a computer to control. You’re just modulating the RPM of four props.” ... "