Tag: windmilling

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Smartprop

Aerodynamically Smart Blades

Smartness of a blade equals its ability to adopt to changing flight conditions. Different values of the axial speed are the main factors effecting flight conditions.

Today’s variable pitch propellers too have a degree of smartness. That means these propellers are capable to adopt to the new regime, when flight conditions (mainly axial speed) change – but only within a narrow margin.

stallfreepropellers.com
Categories
Smartprop

Blade Sophistication Improves Propeller Efficiency

Conventional prop working at design speed. Excellent alignment of the angle of the resulting airspeed and blade pitch, along the whole working radius.
Axial speed – deviates from design value. Discrepancies appear between the direction of the resulting airspeed and blade pitch, along the radius. Propeller efficiency drops.

Simultaneous Stall and Windmilling on The Same Blade – Happens Frequently, Undiscovered

Stallfree propellers have sophisticated blades. Both stall and windmilling regimes can be avoided – along the whole working radius, in a very wide range of axial speed.

stallfreepropellers.com