In certain example embodiments, the velocity of the air/wind may be increased within the channel by {TAIL ~ virtue} of features including, for example, retractable and directional vanes and side wall elements that help create {HEAD ~ constricting locations}  
In certain example embodiments , the velocity of the air / wind may be increased within the channel by { TAIL ~ virtue } of features including , for example , retractable and directional vanes and side wall elements that help create { HEAD ~ constricting locations }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH