ering ; ▁t ether ▁re eling ▁spe eds ▁and ▁directions ▁can ▁be ▁adjust ed ▁in ▁response ▁to ▁t ether ▁t ensions ▁and ▁needs ▁of ▁the ▁system ▁during ▁a ▁power - gener ating ▁phase ▁or ▁return - non - power - gener ating ▁phase . ▁K ite ▁control ▁parts ▁vary ▁widely . ▁ ▁Method s ▁of ▁converting ▁the ▁energy ▁ ▁The ▁mechanical ▁energy ▁of ▁the ▁device ▁may ▁be ▁converted ▁to ▁heat , ▁sound , ▁electric ity , ▁light , ▁t ension , ▁push es , ▁pull s , ▁las er , ▁mic row ave , ▁chemical ▁changes , ▁or ▁compression ▁of ▁g ases . ▁Tra ction ▁is ▁a ▁big ▁direct ▁use ▁of ▁the ▁mechanical ▁energy ▁as ▁in ▁t ug ging ▁cargo ▁ships ▁and ▁k ite board ers . ▁ ▁There ▁are ▁several ▁methods ▁of ▁getting ▁the ▁mechanical ▁energy ▁from ▁the ▁wind ' s ▁kin etic ▁energy . ▁ ▁L ighter - than - air ▁( LT A ) ▁mo ored ▁aer ost ats ▁are ▁employed ▁as ▁lif ters ▁of ▁tur b ines . ▁ ▁He avier - than - air ▁( HT A ) ▁t ether ed ▁air fo ils ▁are ▁being ▁used ▁as ▁lif ters ▁or ▁tur b ines ▁themselves . ▁Com bin ations ▁of ▁L TA ▁and ▁HT A ▁devices ▁in ▁one ▁system ▁are ▁being ▁built ▁and ▁flow n ▁to ▁capture ▁H A WP . ▁Even ▁a ▁family ▁of ▁free - fl ight ▁air bor ne ▁devices ▁are ▁represented ▁in ▁the ▁literature ▁that ▁capture ▁the ▁kin etic ▁energy ▁of ▁high - alt