737 Flight Crew Operations Manual
Performance Inflight
All Engine
737-800WSFP1/CFM56-7B26
FAA
Category C/N Brakes
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP PI.11.7
Long Range Cruise Wind-Altitude Trade
The above wind factor tables are 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 30 7 0 4 16 33
39 22 4 0 4 15 30 45
37 37 14 2 0 5 15 28 43 56
35 23 7 0 0 6 16 28 41 54 64
33 2 0 2 8 18 29 41 53 62 68
31 0 4 11 21 31 42 52 61 67 70
29 7 152434435361677070
27 19 27 36 45 54 61 66 70 70 68
25 31 40 48 55 62 67 70 70 69 64
September 15, 2016
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