A NACA 2412 airfoil with a 4.2 ft chord and 7.5 ft span, which has a rectangular planform, is being tested in a wind tunnel at a standard sea level conditions at test-section velocity 70 knots at an angle of attack of 10 deg. A) What is the airfoil’s maximum thickness, maximum camber, and its location? B) Does this airfoil have negative or positive camber? Why? C) Calculate the operating Reynolds number, Re? Determine whether the flow around the airfoil is laminar or turbulent? D) What are the values of ?? , ??, and ?? ?.?. at the above conditions? E) How much lift, drag, and pitching moment about the aerodynamics center are the airfoil generating?
A NACA 2412 airfoil with a 4.2 ft chord and 7.5 ft span, which has a rectangular planform, is being tested in a wind tunnel at a standard sea level conditions at test-section velocity 70 knots at an angle of attack of 10 deg. A) What is the airfoil’s maximum thickness, maximum camber, and its location? B) Does this airfoil have negative or positive camber? Why? C) Calculate the operating Reynolds number, Re? Determine whether the flow around the airfoil is laminar or turbulent? D) What are the values of ?? , ??, and ?? ?.?. at the above conditions? E) How much lift, drag, and pitching moment about the aerodynamics center are the airfoil generating?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A NACA 2412 airfoil with a 4.2 ft chord and 7.5 ft span, which has a rectangular planform, is
being tested in a wind tunnel at a standard sea level conditions at test-section velocity 70 knots
at an angle of attack of 10 deg.
A) What is the airfoil’s maximum thickness, maximum camber, and its location?
B) Does this airfoil have negative or positive camber? Why?
C) Calculate the operating Reynolds number, Re? Determine whether the flow around the airfoil
is laminar or turbulent?
D) What are the values of ??
, ??, and ?? ?.?. at the above conditions?
E) How much lift, drag, and pitching moment about the aerodynamics center are the airfoil
generating?
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