An intermediate section of {TAIL ~ the rotor} has {HEAD ~ shear webs} bonded above and below spaced apart spar caps, providing a stiff box beam cross section 
An intermediate section of { TAIL ~ the rotor } has { HEAD ~ shear webs } bonded above and below spaced apart spar caps , providing a stiff box beam cross section
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH