So what’s the deal with these angles? The angle of incidence affects the amount of lift being produced. Let’s take a look at a helicopter rotor blade: Similarly, inputting right or left foot pedal will pitch the tail rotor blades and change their AOI.Īny airfoil has an angle of incidence: wings, elevators, fins, you name it - as long as it creates lift. When we move the collective up and down, the pitch of the main rotor blades changes, thus changing the AOI. We also have an AOI for our tail rotor blades. This angle is often called the blade pitch angle, so don’t be confused.
In the case of our helicopter, the major AOI is the angle between the pitch of the main rotor blades and the mast. The angle of incidence (AOI) measures the angle between the chord line of an airfoil and the point to which it is fixed. Let’s throw a hook and knock this post out. Both measure an angle of an airfoil but in separate ways. Angle of attack and angle of incidence are two aerodynamic factors that don’t really work against each other. The truth is, this is a pretty poor analogy and I apologize. For these reasons, I’ll put my money on Angle of Attack. Furthermore, people are far more likely to recognize Angle of Attack due to the fact that Angle of Incidence had an identity crisis at a young age and sometimes goes by “Blade Pitch Angle.” It became confusing and only true luchador followers know that Angle of Incidence and Blade Pitch Angle are one and the same. While adaptable, Angle of Incidence is too easy to read and manipulate. Surely, Angle of Attack would be much more dynamic, quick, and difficult to calculate. If I had to put money down on a backyard dirt-pit fight between luchadores named Angle of Incidence and Angle of Attack, I would choose the latter every time.
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