71956 ⎘
Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft; Blades; Constructional features Solid blades
ROTOR BLADE
#2Fiber sheet stacked rotor design
#3Folding propeller, power component and unmanned aerial vehicle
#4Fiber sheet stacked rotor design
#5Propeller blade with carbon foam spar core