Each panel has markings on {HEAD ~ its side} to indicate the wind speed required to effectuate {TAIL ~ its unfurling} 
Each panel has markings on { HEAD ~ its side } to indicate the wind speed required to effectuate { TAIL ~ its unfurling }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL