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		 i get what you are saying.  
i mean if you think about it, the aircrafts mass would be pulled towards earth, therefore making it sort of a parabolic/curvilinear motion question. you'd have to also factor in normal air drag (even if its still) 
 
this oculd be over complicated to high level calculus/dynamics, however, for the sake of making it damn near impossible to solve, i guess we assume a "point particle" as the plane (as in, having in infintesimally small mass, which can then be neglected, etc) 
 
 
typos are cuz im drunk and just got home from clubbin lol 
		
		
		
		
		
		
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