What does the 4 digit numbers mean in NACA airfoil?

maximum camber
The NACA four-digit wing sections define the profile by: First digit describing maximum camber as percentage of the chord. Second digit describing the distance of maximum camber from the airfoil leading edge in tenths of the chord. Last two digits describing maximum thickness of the airfoil as percent of the chord.

What does the 4 digit numbers mean in NACA airfoil for instance what does it mean by 0012 in NACA 0012?

Nomenclature of NACA 4 digit Airfoil The four digits of NACA 4-digit airfoil indicates the following; For NACA 2412 airfoil, the maximum camber is 2% of the chord length. The second digit indicates the position of maximum camber from the airfoil leading edge in tenths of the chord.

What does every number of NACA 4412 airfoil mean?

The NACA 4412 is a four digit airfoil. The first digit expresses the camber in percent chord, the second digit gives the location of the maximum camber point in tenths of chord, and the last two digits gives the thickness in percent chord.

What does NACA 2412 airfoil mean?

The NACA airfoils are airfoil shapes for aircraft wings developed by the National Advisory Committee for Aeronautics (NACA). For example, the NACA 2412 airfoil has a maximum camber of 2% located 40% (0.4 chords) from the leading edge with a maximum thickness of 12% of the chord.

How do you read a 5 digit NACA?

NACA Five-Digit Series: The first digit, when multiplied by 3/2, yields the design lift coefficient (cl) in tenths. The next two digits, when divided by 2, give the position of the maximum camber (p) in tenths of chord. The final two digits again indicate the maximum thickness (t) in percentage of chord.

How do you calculate airfoil thickness?

Calculating the Thickness of a NACA 4-Digit (Modified)Airfoil

1. y = one half the maximum thickness when x/c = m, the specified location of maximum thickness (as fraction of chord).
2. The leading edge radius = 1.1019/36.0*((t/c)*leIndex))2 [ see p.

How do I choose a good airfoil?

The airfoil you choose is going to be a determined by the desired operating parameters of your design, each requirement you add will have input to your airfoil decision. For Example: Thin symmetrical airfoils are great for aerobatics but not for lift – see the Extra 300 vs a Zenith CH801.