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8. Engine and aircraft integration
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8.1 Aerodynamic interference
Propeller performance is often determined when the propeller is isolated (mounted on a shaft of infinite length, no cowling, no nacelle, no engine or wing air intake in its vicinity). When the propeller is installed on the aircraft, aerodynamic interactions occur (with the wing, the engine nacelle, the propeller spinner, etc.) which, in most cases, modify performance (up to ± 10% of propeller efficiency). Powerful numerical tools, still under development, are needed to correctly anticipate the consequences of these phenomena.
In addition, the propeller wake can sometimes have undesired effects on aircraft behavior...
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Engine and aircraft integration
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References
Certification
The regulations governing propeller certification are mainly laid down by the American (FAR PART 35) and European (JAR-P) authorities.
Research center
Office National d'Etudes et de Recherche Aéronautique (ONERA)
Main helicarists
Ratier-Figeac, France
Hamilton Standard, United States
Dowty Rotol, United Kingdom
Hartzell Propeller Inc, United States
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