SAE AIR4065 Rev A

Current Revision
Propeller/Propfan In-Flight Thrust Determination

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Propeller/Propfan In-Flight Thrust Determination

PUBLISH DATE 2012
PAGES 216

AIR 4065, "Propeller/Propfan In-Flight Thrust Determination" addresses steady state propeller thrust as applied to aircraft which are usually powered by gas turbine engines.

It includes theory, examples and methods which have been used.

Specifically two methods are discussed:

  • the "J" or traditional J, Cp, Ct, η method including the SBAC variation
  • a new method we call the "Theta" method which is dependent on knowing blade angle, power/torque and flight Mach number

Implementation guidelines are offered as well as overall approaches to flight testing.

Appendices include expansions on theory and testing as well as examples.

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