A latest Chinese developed land-air dual-mode drone weighing about the same as an apple has shown promising potential in ...

It has dual contra-rotating main rotors, and no tail blades, known as a coaxial rotor system. This provides several advantages, including greater life, better survivability and increased agility.

With its 360-degree strong motor rotor, precise adjustment is a breeze ... Yes, it is possible to combine two outdoor antennas using a coaxial splitter or a combiner. This technique, known as antenna ...