, ▁a ▁surface ▁( e . g . ▁wing ) ▁may ▁be ▁made ▁up ▁of ▁many ▁sections ▁( 1 ▁to ▁ 4 ▁is ▁typical ), ▁and ▁each ▁section ▁is ▁further ▁divided ▁into ▁as ▁many ▁as ▁ 1 0 ▁separate ▁sub sections . ▁ ▁After ▁that , ▁the ▁lift ▁and ▁drag ▁of ▁each ▁section ▁are ▁calculated , ▁and ▁the ▁resulting ▁effect ▁is ▁applied ▁to ▁the ▁whole ▁aircraft . ▁When ▁this ▁process ▁is ▁applied ▁to ▁each ▁component , ▁the ▁sim ulated ▁aircraft ▁will ▁fly ▁similar ▁to ▁its ▁real - life ▁counter part . ▁This ▁approach ▁allows ▁users ▁to ▁design ▁aircraft ▁quickly ▁and ▁easily , ▁as ▁the ▁sim ulator ▁engine ▁immediately ▁illustr ates ▁how ▁an ▁aircraft ▁with ▁a ▁given ▁design ▁might ▁perform ▁in ▁the ▁real ▁world . ▁X - Pl ane ▁can ▁model ▁fairly ▁complex ▁aircraft ▁designs , ▁including ▁hel ic op ters , ▁rock ets , ▁rot or craft , ▁and ▁t ilt - rot or ▁craft . ▁ ▁Ext ens ibility ▁ ▁Users ▁are ▁encourag ed ▁to ▁design ▁their ▁own ▁aircraft , ▁and ▁design ▁software ▁titled ▁Pl ane ▁M aker ▁and ▁Air fo il ▁M aker ▁are ▁included ▁with ▁the ▁program . ▁This ▁has ▁created ▁an ▁active ▁community ▁of ▁users ▁who ▁use ▁the ▁sim ulator ▁for ▁a ▁variety ▁of ▁purposes . ▁Since ▁design ing ▁an ▁aircraft ▁is ▁relatively ▁simple ▁and ▁the ▁flight ▁model ▁can ▁help ▁predict ▁performance ▁of ▁real - world ▁aircraft , ▁several ▁aircraft ▁companies ▁use ▁X - Pl ane ▁in ▁their ▁design ▁process . ▁The ▁Carter C opter ▁uses ▁X - Pl