angle of incidence

[helpCX]

I cant remember if the angle on incidence is the same as angle of attack or what the difference is. help

[Fish]

Angle of incidence is a permanent angle built into the plane; the chord line of the wing to the horizontal datum line of the aircraft. Angle of attak is the angle at which the wing meets the air (relative airflow).

[DEFPOTEC]

Aof I is the angle between the chord of the wing and the horizontal plane. A of A is the angle between the chord of the wing and the relative airflow. essentially A of I is how the wing is bolted on and A of A is the angle you creaTE while flying.

[DEFPOTEC]

fish, we seem to be in sync.

[Fish]

No, I don't care for N'SYNC.

[Louis]

Another thing to add is that the answer to your question, while reading French language documents depends on where the text was written/translated.

And now, the long drawn out answer:
French texts from Europe tend to use "angle d'incidence" as the angle between chord and airflow, while French texts from Quebec use "angle d'attaque" for the same. (You might also see the Greek letter alpha)

Depending on which term is used for the angle between chord and flow, I've seen "angle d'incidence" to refer to the angle between horizontal plane and chord, or, "angle de calage", also used while explaining prop pitch.

Goodbye,

Louis

[Fish]

Uh, yeah, I'm pretty sure the question was in english.

[tripleseven]

I think in "Handling the Big Jets", angle of incidence refers to angle of attack. I can't seem to find my copy, so if I do, I'll post a reference.

[tripleseven]

From page 4 of the 3rd edition:

Incidence The angle between the wing chord line and the free air stream. (Also referred to as 'angle of attack').

Leave it to the British to do everything backwards.