4 ▁cad ets , ▁with ▁several ▁training ▁squad rons ▁and ▁a ▁Head quarters ▁and ▁Head quarters ▁Company ▁( H HC ). ▁ ▁Between ▁June ▁and ▁late ▁November ▁ 1 9 1 7 , ▁manufact ur ers ▁met ▁the ▁immediate ▁demand ▁for ▁primary ▁train ers ▁with ▁the ▁delivery ▁of ▁ 6 0 0 ▁new ▁Curt iss ▁J N - 4 A ▁Jenn ies , ▁as ▁the ▁air plane ▁became ▁known . ▁The ▁famous ▁Jen ny ▁remained ▁the ▁u bi quit ous ▁primary ▁tra iner ▁throughout ▁the ▁war . ▁ ▁Depending ▁upon ▁the ▁v ag aries ▁of ▁weather , ▁equipment , ▁and ▁individual ▁ability , ▁the ▁asp iring ▁pilot ▁needed ▁six ▁to ▁eight ▁weeks , ▁including ▁forty ▁to ▁fifty ▁hours ▁of ▁flying ▁time , ▁to ▁ear n ▁his ▁wings . ▁ ▁Advanced ▁Training ▁Over ▁ 1 1 , 0 0 0 ▁flying ▁cad ets ▁received ▁their ▁wings ▁and ▁were ▁commission ed ▁before ▁entering ▁four ▁weeks ▁of ▁advanced ▁training . ▁ ▁Advanced ▁training ▁in ▁the ▁United ▁States ▁adopted ▁the ▁scheme ▁used ▁by ▁tact ical ▁squad rons ▁in ▁France ▁of ▁class ifying ▁flying ▁personnel ▁( p il ots ▁or ▁obser vers , ▁the ▁latter ▁including ▁all ▁non - p il ots ) ▁according ▁to ▁mission . ▁ ▁P urs uit ▁instruction ▁took ▁place ▁at ▁Rock well ▁Field , ▁Carl st rom ▁Field , ▁and ▁Dor r ▁Field ▁ ▁The ▁purs uit ▁pilot , ▁flying ▁a ▁single - se at ▁aircraft , ▁usually ▁at ▁high ▁alt itude , ▁was ▁the ▁f ighter . ▁ ▁The ▁approximately ▁nine -