Sunday, March 10, 2013

How does an airplane, boat and ship propeller work?


Spinning of a Twisted Airfoil-Shaped Blade

Blade sections near the center have Lower Speed

Blade sections near the Tip have Higher Speed

Movement of Blade Draws Fluid (Air, Water, Liquid, Gas)

Speed is Inversely Proportional to Pressure (Bernoulli's principle)

Fluid near blade center have Lower Speed but Higher Pressure

Fluid near blade tip have Higher Speed but Lower Pressure
  

Drawing of Airfoil (Aerofoil) shape of Propeller Blade. 

  

Fluid flows from Higher Pressure to Lower Pressure

Every action has an equal and opposite reaction (Newton’s Third Law of Motion)

Propeller exerts force to the Water --> Water pushes the Ship, Boat forward

Propeller exerts force to the Air ------> Air pushes the Airplane, Aircraft forward

Pressure Differential creates Forward Force called Thrust --> Ship, Boat, Airplane

Pressure Differential produces Upward Force called Lift ----> Airplane, Aircraft


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