Formulas Flashcards
1
Q
Taper Ratio
A
tip chord / root chord
2
Q
Load factor
A
η = Lift / Weight
η = 1 / cosθ
3
Q
Wing area
A
Span • Average Chord ( S=b•c)
4
Q
Average chord
A
C=Root chord + Tip chord / 2
5
Q
Aspect Ratio
A
AR = Span / Chord (AR=b/c)
AR= Span^2 / Wing Area (Span^2/S)
6
Q
Wing Loading
A
Aircraft weight / wing area [N/m^2]
7
Q
Stall speed Vs new, at a new weight
A
Vs new = Vs old • √ (Weight new / weight old)
8
Q
Angle of climb
A
sin γ = T-D / W
9
Q
Forces in a steady climb
A
L = W cos γ
and
T= D + W sin γ
10
Q
Glide range
A
Glide range = height • L/D ratio
11
Q
Angle of descent
A
Sin γ = D-T / W
12
Q
Forces in a descent
A
Lift = W Cos y (perpendicular to flight path)
T = D - W sin y (parallel to flight path)
D = W sin y (glide descent; parallel to flight path)
13
Q
Circumference
A
2πr
14
Q
Centripetal force
A
Fc = m•V^2/r
15
Q
Radius of turn
A
r =V^2 / g tan φ
