Over-the-wing Engine Mount Configuration of Honda Jet

Engine location was the major design decision in the development of the HondaJet configuration. Conventional wisdom suggests that locating the engine nacelles over the wing creates unfavorable aerodynamic interference, inducing a strong shock wave that increases drag.

However, through experimentation and extensive testing, Honda engineers discovered an optimal position for the nacelle over the wing that minimizes the shock wave and achieves lower drag than the conventional rear-fuselage engine mount configuration. And, since the engine support structure does not go through the fuselage, fuselage internal volume is maximized.

this info from : http://world.honda.com

Over-the-wing Engine Mount Configuration of Honda Jet