itude ▁wind s ▁( begin ning ▁with ▁a ▁description ▁in ▁ 1 9 6 7 ▁by ▁Richard ▁Miller ▁in ▁his ▁book ▁Without ▁Vis ible ▁Me ans ▁of ▁Support ) ▁and ▁a ▁contemporary ▁pat ent ▁application ▁by ▁D ale ▁C . ▁K ram er , ▁so aring ▁sail plane ▁compet itor , ▁invent or . ▁ ▁A ▁research ▁on ▁air bor ne ▁wind ▁tur bine ▁technology ▁innov ations ▁reve als ▁that ▁the ▁“ K ite ▁type ▁A WT s ” ▁technique , ▁the ▁most ▁ ▁common ▁ ▁type , ▁has ▁ ▁high ▁scope ▁ ▁of ▁ ▁growth ▁ ▁in ▁ ▁the ▁ ▁future ; ▁ ▁it ▁has ▁ ▁contributed ▁ ▁for ▁ ▁about ▁▁ 4 4 % ▁ ▁of ▁ ▁the ▁total ▁air bor ne ▁wind ▁energy ▁during ▁ 2 0 0 8 – 2 0 1 2 . ▁The ▁k ite ▁type ▁A WT s ▁extract ▁energy ▁through ▁wind ▁tur b ines ▁susp ended ▁ ▁at ▁ ▁high ▁ ▁alt itudes ▁ ▁using ▁ ▁k ites ▁ ▁such ▁ ▁as ▁ ▁multi - t ether ed ▁ ▁k ite , ▁ ▁k ite ▁ ▁and ▁ ▁dual ▁ ▁purpose ▁ ▁circular ▁ ▁fan , ▁rot ary ▁wing ▁k ites ▁etc . ▁ ▁Electric ▁generator ▁position ▁in ▁a ▁H A WP ▁system ▁Electric ity ▁generation ▁is ▁just ▁one ▁of ▁the ▁options ▁for ▁capt uring ▁mechanical ▁energy ; ▁however , ▁this ▁option ▁domin ates ▁the ▁focus ▁of ▁profession als ▁aim ing ▁to ▁supply ▁large ▁amounts ▁of ▁energy ▁to ▁commerce ▁and ▁util ities . ▁A ▁long