Chapter 28 - High speed flight Flashcards
1
Q
How to work out the LSS
A
39 x square root of Temp in Kelvin = knots
2
Q
How to work out Mach Number
A
LSS
3
Q
Stall speed does what at high altitude and why
A
increases
compressibility
4
Q
Mfs is
A
Mach free stream
5
Q
Ml is
A
Mach local number
6
Q
What is Mcrit
A
Somewhere on the a/c Ml has reached mach 1
7
Q
x3 types of flow
A
Subsonic = less than mach 1 Sonic = exactly mach 1 supersonic = over mach 1
8
Q
What is the slow subsonic region up to
A
0.4 mach
9
Q
what is the transonic region
A
Mcrit to Mdet (depends on aircraft type for figures)
10
Q
What is the region for supersonic
A
everything is above Mdet
11
Q
A normal shockwave is what to the airflow and how big
A
perpendicular to the flow
0.0025 mm
