▁chapter ▁K ite - Sh ip ▁well ▁describes ▁key ▁dynamics ▁of ▁H A WP ▁used ▁for ▁t ug ging ▁ships ▁by ▁k ites . ▁John ▁Gay ' s : ▁or ▁Work ▁for ▁Boys . ▁Chapter ▁XVIII ▁in ▁the ▁Summer ▁volume . ▁▁ 1 9 3 5 ▁Alo ys ▁van ▁G ries ▁stands ▁as ▁a ▁strong ▁early ▁pat ente e ▁of ▁high - alt itude ▁wind ▁power ; ▁he ▁taught ▁various ▁k ite ▁systems ▁for ▁use ▁in ▁generating ▁electric ity ▁in ▁his ▁DE ▁ 6 5 6 1 9 4 ▁C ▁pat ent : ▁Durch ▁Dra chen ▁get rag ene ▁Wind k raft mas ch ine ▁zur ▁N utz bar m ach ung ▁von ▁H oe hen w inden ▁ 1 9 4 3 ▁ ▁Stanley ▁B isz ak ▁instruct ed ▁using ▁potential ▁energy ▁in ▁free - fl ight ▁for ▁converting ▁ambient ▁wind s ▁impact ing ▁tur bine ▁to ▁drive ▁electric ▁generator ▁to ▁charge ▁batter ies . ▁▁ 1 9 6 7 ▁ ▁Richard ▁Miller , ▁former ▁editor ▁of ▁So aring ▁magazine , ▁published ▁book ▁Without ▁Vis ible ▁Me ans ▁of ▁Support ▁that ▁describes ▁the ▁feas ibility ▁of ▁free - fl ight ▁couple d ▁non - ground - mo ored ▁k ites ▁to ▁capture ▁differences ▁in ▁wind ▁str ata ▁to ▁travel ▁across ▁contin ents ; ▁such ▁H A WP ▁is ▁the ▁subject ▁of ▁D ale ▁C . ▁K ram er ' s ▁contemporary ▁pat ent ▁application . ▁▁ 1 9 7 3 ? ▁Hermann ▁Ober th ▁In ▁the ▁append ix ▁of ▁his ▁book ▁Pr