Using multi-rotor unmanned helicopters for various purposes becomes a practice in the recent years, due to the increased efficiency of electrical motors and batteries and at the same time their lowering cost. Multi-rotors are applicable in a number of situations, from pollution monitoring and disaster management to scientific research.
Starting from tri-copters and quad-copters users are more and more demanding multi-rotors with larger number of propellers aiming at lower risk, higher efficiency, larger payloads, etc. Among those helicopters are machines with five, six, seven, eight or even a larger number of propellers.
The current paper presents a comparison between the standard sever-rotor unmanned helicopter in “star”-configuration and a new design again with sever rotors, but using the H-airframe paradigm. The proposed design has a number of benefits that are disclosed in this publication.
Unmanned multi-rotor helicopter, Multi-rotor helicopter airframe, Quad-rotor helicopter, Septa-rotor helicopter
