UAVs or drones are used in a number of applications worldwide. For the Silent Flyer we focus on applications where a silent and non-obtrusive device is proven to be needed. These are in the fields of government law enforcement and surveillance by government and private companies, military use, and wildlife photography & research.
Drones (Unmanned air vehicles (UAVs)) are evolving into important tools, not only for military covert operations, but also policing (citizen survey and safety) and wildlife conservation/surveillance. Nevertheless, their widespread implementation is restrained by the noise and obtrusive appearance limitations of commercialized technologies in either flight range or usability.
Unmanned air vehicles (UAVs), colloquially called drones, are defined as “an unmanned aircraft or ship that can navigate autonomously, without human control or beyond the line of sight” . UAVs are nowadays evolving into important tools in different fields. However, their widespread implementation is restrained by the noise and obtrusive appearance limitations of commercialized technologies. They tend to live up to their names in that they emit a constant buzzing noise when in operation, created by several rotors and electric parts as well as conventional motors, with both fixed wing and rotorcraft UAVs. UAVs use propellers at a high rate of revolution, which are inherently noisy, highly annoying for the citizens (as confirmed my recent NASA studies) and harmful . For this reason, new EU regulations are proposing noise caps on UAV . They are also quite obtrusive and their operation in the sky is obvious to bystanders. The UAVs has been successfully applied for:
For successful embracing of UAVs as military, surveillance and research operations by a variety of private and government institutions, a rotor-less operation combined with maneuverability and durability in challenging environments is needed. This will also cause minimum chances of personal injury from elimination of open rotors and propellers. It should also provide ease of launch and imbibing vertical take-off and landing (VTOL) ability. In addition, a truly unobtrusive appearance such as that of a flying bird can ensure operation at lower altitudes without standing out as an obtrusive element in the sky, which will not interfere with natural habitats of wildlife (during wildlife photography/surveillance) or get detected prematurely during police or military operations. In addition, such bio-form UAVs should have no or very little humming noise area. Any continuous “humming noise” > 85 dB is known to cause permanent hearing disability while <70 dB is equivalent to the noise of an air conditioner or shower.