Question

NACA stands for _____

(a) National Advisory Committee for Aeronautics

(b) National Authorized Committee for Aeronautics

(c) National Advisory Committee for Aero models

(d) National Advisory Committee for Arithmetic

This question was posed to me in a national level competition.

This interesting question is from Airfoil Selection-2 topic in chapter Airfoil and Geometry Selection of Aircraft Design

Answer 1

Right answer is (a) National Advisory Committee for Aeronautics

To explain I would say: NACA is a National Advisory Committee for Aeronautics. NACA airfoils are simple to adopt. NACA series is used to identify the airfoil.