34
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 “
▲
”.
60
55
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
FU
EL
L
BS
.
LITE
RS.
O
IL
L
B
S
.
IM
P
G
A
L
.
GA
L.
U
S.
55
50
NAUT.
45
40
35
30
25
20
15
10
90
8
0
70
11
14
16
17
18
19
21
22
23
24
STA
T.
K
M
.
1:10
1:
20
1:3
0
1:
40
1:50
2:
00
2:30
3:00
3:30
4:00
4:
30
5:00
6:0
0
7:00
8:00
9:00
