NACA Series

NACA Series

1. In a NACA 4 digit series, what does the first number represent?

Maximum thickness as percentage of chord
Minimum camber as percentage of chord
Maximum camber as percentage of chord
Minimum thickness as percentage of chord

2. Default maximum thickness of a 4 digit NACA series aerofoil is?

30% of the chord from leading edge
45% of chord from leading edge
15% of chord from leading edge
25% of chord from leading edge

3. What is the maximum camber location of a NACA 2412 aerofoil from leading edge?

0.8
0.2
0.12
0.4

4. What is the theoretical optimum lift coefficient of a NACA 23112 aerofoil at ideal angle of attack?

0.2
0.15
0.3
0.45

5. What does the third digit in a NACA 5 series aerofoil represent?

Camber is simple or reflex
Maximum Lift coefficient
15% of chord from leading edge
Maximum thickness of aerofoil