This　work　analyses　the　complex　aerodynamic　issues　involved　in　HexC　(Hexarotor　with　canted　rotors)　when　a　complete　failure　of　one　propeller　occurs.　The　HexC　used　has　the　tilted　rotor　configuration,　which　gives　it　good　maneuverability　and　fault　tolerance.　The　effect　of　different　cant　angles　(　α　)　and　rotational　speed　(　Ω　)　on　the　aerodynamic　performance　of　the　HexC　was　evaluated.　Both　thrust　and　torque　for　each　propeller　are　obtained　from　a　test　bench.　Computational　fluid　dynamics　numerical　simulation　was　used　to　obtain　the　flow　field　characteristics　around　the　propellers,　and　its　validity　is　verified　by　comparing　it　with　the　experimental　data.　Experimental　results　show　that　when　one　propeller　fails,　the　performance　of　the　remaining　propellers　at　different　locations　will　differ.　The　heightened　sensitivity　of　face-to-face　configurations　stems　from　the　collapse　of　inflow　synergy　effects　following　single-propeller　failure,　where　the　interdependent　flow　acceleration　mechanism　between　paired　propellers　abruptly　terminates.　Conversely,　back-back　configurations　demonstrate　inherent　robustness　through　aerodynamic　independence　from　the　induced　flow　of　a　failed　propeller,　and　beneficial　release　of　mutual　wake　interference　that　normally　generates　parasitic　drag　during　nominal　operation.　©　2025　Author(s).