Hi,
I'm not quite sure this is related to this thread but it may fit in. Found a Chinese stealth UAV patent issued in March of 2018.
Patent number: CN207141406.
Title: Stealthy unmanned aerial vehicle driving system of all-wing aircraft overall arrangement
Applicant(s): XIAN UAVTOP AVIATION TECH CO LTD +
Inventor: 不公告发明人
Abstract:
The utility model relates to an unmanned air vehicle technique field, the utility model discloses an overcoming the not enough of current unmanned aerial vehicle driving system stealth effect difference, and providing a stealthy unmanned aerial vehicle driving system of all-wing aircraft overall arrangement, it includes intake duct, turbine jet engine and the jet pipe of following aircraft nose to tail and connecting gradually, the inlet set of above -mentioned intake duct is square at quick-witted back, its cross-section, the lower limb and the coincidence of unmanned aerial vehicle leading edge of above -mentioned air inlet, above -mentioned inlet set has the radar shielding net of being made by conducting material, and above -mentioned radar shielding netlist face and stealthy unmanned aerial vehicle surface keep camber continuous to lead to with stealthy unmanned aerial vehicle surface conductance.
A.