Thrust Line

[ekimneirbo]

What can anyone tell me on the specifics of raising or lowering a thrust line in an aircraft? If you look at some of the seaplanes with their engines mounted high and to the rear...they seem to fly just fine. Other than weight and balance considerations, are there other measures taken when an engine
is positioned in the rear? Are there compensations that can/must be made when raising or lowering a tractor pull engine thrustline?

 

[orion]

 

[ekimneirbo]

 

[Norman]