![Explained: NACA 4-Digit GUI Part 4/10 [MATLAB] @JoshTheEngineer](https://i.ytimg.com/vi/x8ls10Euy-k/maxresdefault.jpg)
Uploaded May 2015 | Updated September 2026, 1 week ago
This is the fourth video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We code the airfoil type callback. This edit text box reads in the string of the airfoil that the user wants to compute and plot. After we read in the value of the airfoil, we check to make sure that it is only four digits. If more or less, it displays an error message and makes sure the airfoil can't be plotted.
IN THIS SERIES:
Part 1/10 : goo.gl/9UBgbo
Part 2/10 : goo.gl/jRRcYJ
Part 3/10 : goo.gl/rSVLHo
Part 4/10 : goo.gl/HwHB39
Part 5/10 : goo.gl/AlDne8
Part 6/10 : goo.gl/7n1QP7
Part 7/10 : goo.gl/nTGleR
Part 8/10 : goo.gl/ez247P
Part 9/10 : goo.gl/8mXYcc
Part 10/10: goo.gl/ovBlbW
This is the fourth video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We code the airfoil type callback. This edit text box reads in the string of the airfoil that the user wants to compute and plot. After we read in the value of the airfoil, we check to make sure that it is only four digits. If more or less, it displays an error message and makes sure the airfoil can't be plotted.
IN THIS SERIES:
Part 1/10 : goo.gl/9UBgbo
Part 2/10 : goo.gl/jRRcYJ
Part 3/10 : goo.gl/rSVLHo
Part 4/10 : goo.gl/HwHB39
Part 5/10 : goo.gl/AlDne8
Part 6/10 : goo.gl/7n1QP7
Part 7/10 : goo.gl/nTGleR
Part 8/10 : goo.gl/ez247P
Part 9/10 : goo.gl/8mXYcc
Part 10/10: goo.gl/ovBlbW
![Explained: NACA 4-Digit GUI Part 4/10 [MATLAB]](https://i.ytimg.com/vi/x8ls10Euy-k/mqdefault.jpg "Explained: NACA 4-Digit GUI Part 4/10 [MATLAB]
This is the fourth video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We code the airfoil type callback. This edit text box reads in the string of the airfoil that the user wants to compute and plot. After we read in the value of the airfoil, we check to make sure that it is only four digits. If more or less, it displays an error message and makes sure the airfoil cant be plotted.
IN THIS SERIES:
Part 1/10 : https://goo.gl/9UBgbo
Part 2/10 : https://goo.gl/jRRcYJ
Part 3/10 : https://goo.gl/rSVLHo
Part 4/10 : https://goo.gl/HwHB39
Part 5/10 : https://goo.gl/AlDne8
Part 6/10 : https://goo.gl/7n1QP7
Part 7/10 : https://goo.gl/nTGleR
Part 8/10 : https://goo.gl/ez247P
Part 9/10 : https://goo.gl/8mXYcc
Part 10/10: https://goo.gl/ovBlbW")
![Explained: Radio Button GUI [MATLAB]](https://i.ytimg.com/vi/xN2fMYZgEOw/mqdefault.jpg "Explained: Radio Button GUI [MATLAB]
A radio button can be used for selection and deselection of an option. This video shows how to get the value of a radio button in a MATLAB GUI.")
![Explained: NACA 4-Digit GUI Part 7/10 [MATLAB]](https://i.ytimg.com/vi/x_iOVeqJCLA/mqdefault.jpg "Explained: NACA 4-Digit GUI Part 7/10 [MATLAB]
This is the seventh video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We code the four popup menus that appear in the GUI: Grid Type, Trailing Edge, Plot As, and Save Style.
Popup Menu Video:
https://goo.gl/aY6DoQ
IN THIS SERIES:
Part 1/10 : https://goo.gl/9UBgbo
Part 2/10 : https://goo.gl/jRRcYJ
Part 3/10 : https://goo.gl/rSVLHo
Part 4/10 : https://goo.gl/HwHB39
Part 5/10 : https://goo.gl/AlDne8
Part 6/10 : https://goo.gl/7n1QP7
Part 7/10 : https://goo.gl/nTGleR
Part 8/10 : https://goo.gl/ez247P
Part 9/10 : https://goo.gl/8mXYcc
Part 10/10: https://goo.gl/ovBlbW")
![Explained: Flap Track Fairings/Whitcomb Area Rule [Airplanes]](https://i.ytimg.com/vi/y100a_nB984/mqdefault.jpg "Explained: Flap Track Fairings/Whitcomb Area Rule [Airplanes]
What are flap track fairings and what purpose do they serve on an airplane? These canoe-shaped pieces house linkages and mechanisms that connect the flaps to the wing. As an added bonus (if designed correctly), they can help decrease the wave drag by something known as area-ruling.
Reference(s):
http://www.aerospaceweb.org/question/aerodynamics/q0240.shtml")
![Explained: Selectively Delete Plots in GUI [MATLAB]](https://i.ytimg.com/vi/ysaj4K7PRHI/mqdefault.jpg "Explained: Selectively Delete Plots in GUI [MATLAB]
This video describes how to plot two lines on the same plot in a GUI axes object, and then selectively delete each of the lines using push buttons.")
![Explained: Constant Total Enthalpy [Taylor-Maccoll]](https://i.ytimg.com/vi/yy5HQ9syrrI/mqdefault.jpg "Explained: Constant Total Enthalpy [Taylor-Maccoll]
In order to use Croccos Theorem for the Taylor-Maccoll problem, it is necessary to show why the total enthalpy along a streamline is constant (within the given assumptions). We start with the energy equation couched in terms of the total enthalpy, and reduce the equation with our assumptions from a previous video in this series. The final result will be used in the derivation of Croccos Theorem.")
