Chapter 6: Introduction to Lift Flashcards
1
Q
Lift and Drag direction
A
Lift perpendicular to RAF
Drag parallel to RAF
2
Q
Stall
A
Cl_max
Stall / critical AoA
3
Q
Coefficient of Lift Dependence (3)
A
AoA
Camber
Thickness
4
Q
Thickness effect
A
Thick wing:
higher Cl_max, higher AoA_stall
Commercial Aircraft doesn’t need high Cl_max
5
Q
Cambered+ effect
A
Offset in Cl axis:
Higher Cl_max
6
Q
Trailing Edge Flap Effect
A
Higher Cl_max
Lower AoA_stall
7
Q
High vs. Low Speed Wing
A
High: sharp, thin
lower Cl at AoA = 0, lower Cl_max, lower AoA_stall
Low: rounder, more camber
higher Cl at AoA = 0, higher Cl_max, higher AoA_stall
8
Q
Load Factor and Stall
A
n = L / W Vs = Vs1g * sqrt (n)
