Blade element theory (BET) is a mathematical process originally designed by William Froude (1878), David W. Taylor (1893) and Stefan Drzewiecki to determine the behavior of propellers. It involves breaking an airfoil down into several small parts then determining the forces on them. These forces are then converted into accelerations, which can be integrated into velocities and positions.

ee also

*Computational fluid dynamics
*Momentum theory
*Circulation Theory
*Strip theory for fixed wing aerodynamics
*Conway non linear momentum theory

* [http://aerodyn.org/Rotors/models.html Computational Models for Rotor Aerodynamics]
* [http://www.aeromech.usyd.edu.au/aero/propeller/index.html Blade Element Analysis for Propellers]
* [http://www.aerospaceweb.org/design/helicopter/element.shtml Helicopter Theory - Blade Element Theory in Forward Flight] from [http://www.aerospaceweb.org/ Aerospaceweb.org]
* [http://invention.psychology.msstate.edu/inventors/i/Wrights/library/Chanute_Wright_correspond/1903/Jul2-1903.html Stefan Drzewiecki 1903]

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