Citizen Radio Controlled BY0120-54E - Page 60

58
Speed (ground speed)
Question
What is the speed
(ground speed) of an
airplane when it takes
1 hour and 20 minutes
to fly a distance of 240
nautical miles?
Answer
Align “24” on the scale
to “1:20 (80)”. The
answer “18” (180 kt) on
the scale corresponds
to “
▲
”.
6
0
5
5
50
45
40
35
30
25
20
15
10
11
12
13
14
16
17
18
19
21
22
23
2
4
90
80
70
F
U
E
L
L
B
S
.
L
I
T
E
R
S
.
O
I
L
L
B
S
.
I
M
P
G
A
L
.
G
A
L
.
U
S
.
55
50
N
A
U
T
.
45
40
35
30
25
20
15
10
90
8
0
70
11
14
16
1
7
1
8
1
9
2
1
2
2
23
24
S
T
A
T
.
K
M
.
1
:10
1:
20
1
:
3
0
1:4
0
1:50
2:
00
2:30
3:00
3:
30
4
:00
4:
3
0
5:00
6:00
7:00
8:00
9
:00