- Blade element theory
**Blade element theory**(**BET**) is a mathematical process originally designed byWilliam Froude (1878),David W. Taylor (1893) andStefan Drzewiecki to determine the behavior ofpropeller s. It involves breaking anairfoil down into several small parts then determining the forces on them. These forces are then converted intoacceleration s, 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 **External links*** [

*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://www.dt.navy.mil/pao/excerpts%20pages/1998/proplect7.html Blade element theory*]

* [*http://invention.psychology.msstate.edu/inventors/i/Wrights/library/Chanute_Wright_correspond/1903/Jul2-1903.html Stefan Drzewiecki 1903*]

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