Which of the following is a new NACA airfoil? – McqOptions

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1.	Which of the following is a new NACA airfoil?
A.	NACA 2212
B.	NACA LS (1)-0407
C.	NACA 0021
D.	Both NACA LS (1)-0407 and NACA 2412
Answer» C. NACA 0021

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