Refinement and analysis of concept

Powerplant Location
• Acoustic considerations
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– The further aft on an aircraft the engine is located the less is the
noise impact upon the occupants, but this is not usually a major
consideration.
– Some engine positions, for example those above the wing or
fuselage, reduce the noise as perceived at the ground but at the
expense of powerplant efficiency.
– Acoustic fatigue damage to airframe components located near the
exhaust is likely to be a more important consideration.
– It is especially significant for engines which employ reheat when the
exhaust outlets should be behind all major airframe components.
Aircraft Conceptual Design