1 9 8 6 ▁Bry an ▁Roberts ' ▁A WE ▁H A WP ▁rot or ▁generates ▁electric ity ▁and ▁lif ts ▁itself ▁in ▁t ether ed ▁flight . ▁▁ 1 9 9 2 ▁Free ▁Rot or ▁ ▁W O / 1 9 9 2 0 2 0 9 1 7 ▁Free ▁Rot or ▁by ▁J ACK , ▁Col in , ▁Hum ph ry , ▁Bruce ▁( one ▁man ). ▁Col in ▁Jack . ▁Col in ▁Bruce . ▁Multi - rot ors ▁are ▁treated . ▁Fa ired ▁t eth ers ▁are ▁recognized . ▁ 1 9 9 2 . ▁ ▁See ▁also ▁▁ ▁Air bor ne ▁Wind ▁Energy ▁Indust ry ▁Association ▁ ▁Air bor ne ▁wind ▁tur bine ▁ ▁Alt itude ▁ ▁Bet z ' ▁law ▁ ▁Cross wind ▁k ite ▁power ▁ ▁K ite ▁applications ▁ ▁K ite ▁types ▁ ▁Lad der mill ▁ ▁List ▁of ▁air bor ne ▁wind ▁energy ▁organizations ▁ ▁T ether ▁ ▁Tur bine ▁ ▁Wind ▁ ▁Wind ▁farm ▁ ▁Wind ▁power ▁ ▁Wind ▁profile ▁power ▁law ▁ ▁Wind ▁resource ▁assess ment ▁ ▁Wind ▁tur bine ▁ ▁References ▁ ▁External ▁links ▁ ▁Air bor ne ▁Wind ▁Energy ▁Part icip ants ▁List ▁ ▁T U ▁Del ft ▁k ite ▁power ▁research ▁group ▁ ▁Energy ▁K ite ▁Systems ▁a ▁gl oss ary ▁of ▁terms ▁and ▁links ▁to ▁H A WP ▁systems ▁ ▁A W ES ystem s . info ▁list ▁of ▁organizations ▁ ▁Ass ess ing ▁the ▁Vi ability ▁of ▁High ▁Alt itude ▁Wind ▁Resources ▁in ▁Ireland , ▁Col m ▁O