Editing Pusher configuration (section)

====Aerodynamic considerations====
[[Image:Supermarine Walrus.jpg|thumb|The [[Supermarine Walrus]] pusher flying boat is a typical flying boat, with the engine mounted high to avoid spray; however, throttle changes then induce pitch changes.]]
Due to the generally-high thrust line to ensure ground clearance, a low-wing pusher layout may suffer power-change-induced pitch changes, also known as  pitch/power coupling. Pusher seaplanes with especially high thrust lines and tailwheels may find the vertical tail masked from the airflow, severely reducing control at low speeds, such as when taxiing. The absence of prop-wash over the wing reduces the lift and increases takeoff roll length.<ref>{{cite book|first1= Sighard F.|last1= Hoerner|first2=Dr. -Ing|last2= Habul|first3= Henry V.|last3= Borst|date= 1985|title= Fluid Dynamic Lift: Practical Information on Aerodynamic and Hydrodynamic Lift|edition= 2nd|chapter= XII: Propulsion Lift and Stability, 2. Influence of Propeller Slipstream on Wings|page= 12{{hyphen}}8|url= http://docshare02.docshare.tips/files/3609/36093604.pdf|url-status= live|archive-url= https://web.archive.org/web/20210508132615/http://docshare02.docshare.tips/files/3609/36093604.pdf|archive-date= 8 May 2021}}</ref> Pusher engines mounted on the wing may obstruct sections of the wing [[trailing edge]], reducing the total width available for control surfaces such as flaps and ailerons. When a propeller is mounted in front of the tail, changes in engine power alter the airflow over the tail and can give strong pitch or yaw changes.