If the intake & exhaust aren't in line with each other (parallel with longitudinal axis), you'll get a force couple tending to yaw the aircraft. Intake on a wing + centre exhaust = yaw towards live engine. Just imagine:
dead leg - live engine would be the new saying.
I think there are some twin jets - with engines mounted aft fuselage - that have deliberate toe-in to minimise yaw in the event of an EF on/after takeoff. Unfortunately the lateral component of thrust is totally wasted in the 99.9% of flight where both engines are running normally. For this reason the degree of toe-in is very small. It saves having a long exhaust pipe though.
But hey - VMC can be 1 knot lower, so Captain Bloggs can take off on a runway 23m shorter, so Chief Executive Smith buys an extra 3 aeroplanes, so shareholders Aaron through Zachary make an extra $3.20 each. Cool eh?
O8
