▁December ▁ 2 0 0 3 ▁and ▁it ▁has ▁been ▁in ▁service ▁with ▁Chinese ▁military ▁since . ▁ ▁Har rier ▁is ▁power ed ▁by ▁m eth an ol . ▁ ▁Ka - 5 0 ▁dr one ▁Nobel ▁Mor al ▁Ka - 5 0 ▁dr one ▁is ▁an ▁un mann ed ▁hel ic opter ▁developed ▁by ▁Nobel ▁Mor al ▁originally ▁for ▁air sh ows , ▁but ▁has ▁been ▁adopted ▁by ▁Chinese ▁military ▁for ▁training ▁of ▁the ▁air ▁defense ▁force . ▁ ▁The ▁dr one ▁is ▁mainly ▁used ▁to ▁provide ▁real istic ▁visual ▁identification ▁training ▁of ▁the ▁ground ▁force ▁and ▁air ▁cre ws . ▁Ka - 5 0 ▁dr one ▁has ▁entered ▁service ▁with ▁People ' s ▁Liber ation ▁Army ▁ant ia ircraft ▁art illery ▁forces ▁in ▁Jin z hou . ▁Spec ification : ▁L ength ▁( m ): ▁ 1 . 2 5 ▁Width ▁( m ): ▁ 0 . 9 3 ▁Height ▁( m ): ▁ 0 . 5 ▁ ▁Power ▁line ▁ins pection ▁U AV ▁ 2 6 0 ▁power ▁line ▁pat rol ▁U AV ▁is ▁an ▁un mann ed ▁hel ic opter ▁developed ▁by ▁Nobel ▁Mor al ▁specifically ▁for ▁aer ial ▁ins pection ▁of ▁overhead ▁power ▁lines . ▁ ▁Development ▁was ▁completed ▁in ▁March ▁ 2 0 0 3 ▁and ▁the ▁U AV ▁has ▁been ▁in ▁service ▁since , ▁and ▁has ▁been ▁deployed ▁in ▁Dal ian ▁in ▁power ▁line ▁infrastr ucture ▁construction . ▁Spec ification : ▁L ength ▁( m ): ▁ 2 ▁Width ▁( m ): ▁ 0 . 7