Refinement and analysis of concept

Powerplant Location
• Powerplant/airframe effciency
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– This often means a compromise between engine requirements
and those of the overall aerodynamics.
– For example:
• it may be desirable on a short take-off propeller driven aircraft to space the
engines across the wing to enhance slipstream effect upon low speed lift.
• Ground clearance may suggest that large diameter power units should be
mounted over the top of the wing but this can lead to a considerable loss of
efficiency of lift development.
• In the case of buried engines the intake arrangements may have a significant
effect upon powerplant efficiency and must be given careful consideration,
Aircraft Conceptual Design