737 Flight Crew Operations Manual
Performance Inflight
All Engine
737-8/LEAP-1B27
FAA
CATB
MN-FLT-OH-201
PI.11.7
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File Highlight
Long Range Cruise Wind-Altitude Trade
The above wind factor table is for calculation of wind required to maintain present range capability at new
pressure altitude, i.e., break-even wind.
Method:
1. Read wind factors for present and new altitudes from table.
2. Determine difference (new altitude wind factor minus present altitude wind factor); this difference
may be negative or positive.
3. Break-even wind at new altitude is present altitude wind plus difference from step 2.
PRESSURE ALTITUDE
(1000 FT)
CRUISE WEIGHT (1000 KG)
85
80
75
70
65
60
55
50
45
40
41
13
1
0
3
14
30
39
25
8
0
0
3
13
27
44
37
16
4
0
0
4
13
26
41
59
35
9
1
0
0
5
14
26
40
56
72
33
0
0
1
7
16
27
40
54
69
85
31
0
3
10
18
29
40
53
67
82
97
29
6
13
21
31
42
54
67
80
93
107
27
16
25
34
44
55
67
79
91
104
116
25
29
38
47
58
68
79
91
102
113
124
23
41
51
60
70
80
90
101
111
121
131
October 26, 2021
