Airfoil Questions
An airfoil is a cross-sectional shape used on wings and other streamlined surfaces. The questions answered below
discuss the different types of airfoils, how they are designed and analyzed, and their various applications.
I have constructed an aerofoil and wind tunnel and researched the equation
for lift for a physics class experiment. I will be testing which angles of attack produce the most lift.
However, I am unsure how to actually calculate the lift coefficient. Can you help me?
How would you compute the lift of an experimental airfoil?
I need to know the lift and drag of a symmetric airfoil as a function of
the angle of attack from 0 degrees to 90 degrees. I have seen tables for 0° < alpha < 15°,
but I need it up to 90 degrees. Where can I find these tables?
Please send me information on the NACA 4, 5 and 6 digit airfoils. I would like to
know some general information, their applications, advantages, disadvantages, and the formulas used to
calculate the coordinates. What are the mathematical definitions of NACA profiles such as
0003.46-64.069...I've found 4- and 5-digit NACA airfoil generators, but they don't seem to do the job. Can
you provide any help?
I was searching for airfoil geometry, and came across equations for NACA
4-Digit airfoils...Can you please explain how these equations are derived or where they come from?
...We have been testing NACA 4 digit profiles in a wind tunnel and have been
looking for other test results and/or theoretical solutions of the lift and drag coefficients...
I am interested in defining the airfoils for the A-4 Skyhawk and S-3
Viking. The section designations are of the form NACA 0008-1.1-25 and 0016.3-1.03 32.7/1.00. I have read
your previous explanations on modified four and five digit aifoils and still have a hard time defining it.
Can you help me out?
I am doing my utmost to build a 100% scale radio-controlled flying model of
the FB-111A. The airfoil sections listed for this aircraft are the NACA 64A210.68 and 64A209.80. Can you
explain what these names mean and how to compute the airfoil coordinates?
I found experimental data for the NACA 0012 airfoil at a Reynolds number
of 179,000. According to this data, stall occurred at an angle of attack of 10° and the lift coefficient
at this angle was 0.7065. ... Can you provide a plot of lift coefficient versus alpha for this airfoil at
that Reynolds number?
I want to know about the airfoil sections 622 and 625 and the equations used
to calculate these three-digit configurations. Do you have references about these airfoil sections? How
do you construct their shapes? Do you also have graphs showing the lift and drag versus angle of attack
for these shapes?
What is a supercritical airfoil?
I'm learning how to use a CFD program and I would like to test a
supercritical airfoil to compare with classic airfoils. The problem is that I can't find the coordinates
of a supercritical shape. Could you please help me?
I need the name and an illustration of the Boeing 757-200 wing airfoil
section.
What is the "aft-loaded" wing found on the Boeing 767 and Boeing 777? How
does it differ from and how is it more efficent than a conventional wing?
What type of airfoil is used on the F-22 Raptor? What is its name?
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