itude . ▁ ▁To ▁successfully ▁execute ▁a ▁roll - off - the - top ▁turn , ▁the ▁pilot ▁acceler ates ▁to ▁sufficient ▁air speed ▁to ▁perform ▁a ▁loop ▁in ▁the ▁aircraft . ▁The ▁pilot ▁then ▁pull s ▁the ▁aircraft ▁into ▁a ▁clim b , ▁and ▁continues ▁to ▁pull ▁back ▁on ▁the ▁controls ▁as ▁the ▁aircraft ▁clim bs . ▁Rud der ▁and ▁a iler ons ▁must ▁be ▁used ▁to ▁keep ▁the ▁half - loop ▁straight ▁when ▁viewed ▁from ▁the ▁ground . ▁As ▁the ▁aircraft ▁passes ▁over ▁the ▁point ▁at ▁which ▁the ▁clim b ▁was ▁comm enced , ▁it ▁should ▁be ▁invert ed ▁and ▁a ▁half ▁loop ▁will ▁have ▁been ▁executed . ▁Su fficient ▁air speed ▁must ▁be ▁maintained ▁to ▁recover ▁without ▁losing ▁alt itude , ▁and ▁at ▁the ▁top ▁of ▁the ▁loop ▁the ▁pilot ▁then ▁executes ▁a ▁half - roll ▁to ▁reg ain ▁normal ▁u pr ight ▁aircraft ▁orientation . ▁As ▁a ▁result , ▁the ▁aircraft ▁is ▁now ▁at ▁a ▁higher ▁alt itude ▁and ▁has ▁changed ▁course ▁ 1 8 0 ▁degrees . ▁ ▁Not ▁all ▁aircraft ▁are ▁capable ▁of ▁( or ▁cert ified ▁for ) ▁this ▁man eu ver , ▁due ▁to ▁ins u fficient ▁engine ▁power , ▁or ▁engine ▁design ▁that ▁pre cludes ▁flying ▁invert ed . ▁( This ▁usually ▁applies ▁to ▁p ist on ▁engines ▁that ▁have ▁an ▁open ▁oil ▁pan . ▁However , ▁when ▁properly ▁flow n , ▁the ▁aircraft ▁will ▁maintain ▁positive ▁G ▁throughout ▁the ▁man eu ver , ▁elimin ating ▁the ▁requirement ▁for ▁an ▁invert ed ▁oil ▁system