737 Operations Manual
Performance Inflight -
Text
737-400/CFM56-3_23.5K
Copyright © The Boeing Company. See title page for details.
PI.26.2 D6-27370-400E-TBCE
V1(MCG), set V1 equal to V1(MCG). If VR is less than V1(MCG), set VR
equal to V1(MCG), and determine a new V2 by adding the difference
between the normal VR and V1(MCG) to the normal V2.
If it is necssary to increase V1 to V1(MCG), then provided the actual field
length exceeds the minimum field length of 4500ft no takeoff weight
adjustment is necessary.
Clearway and Stopway V1 Adjustments
Takeoff speed corrections are to be applied to V1 speed when using takeoff
weights based on the use of clearway and stopway.
Adjust V1 speed by the amount shown in the appropriate column. The
adjusted V1 speed must not exceed VR. If the adjusted V1 speed is greater
than VR, reduce V1 to equal VR.
Maximum allowable clearway limits are provided for guidance when more
precise data is not available.
Assumed Temperature Takeoff
For reduced thrust takeoffs based on assumed temperature, determine V1,
VR, V2 from the appropriate column for airport pressure altitude and
assumed temperature. Adjust V1 for slope, wind, clearway and stopway as
required. Compare adjusted V1 with V1(MCG) from table using airport
altitude and actual temperature. This is a regulatory requirement to cover
the case where the pilot elects to advance thrust levers to maximum takeoff
thrust following the engine failure. If adjusted V1 is less than V1(MCG)
set V1 equal to V1(MCG).
Stab Trim
To find takeoff stabilizer trim setting, enter the appropriate Stab Trim
Setting table with center of gravity (C.G. % MAC) and read required
stabilizer trim units. For weights that meet the conditions listed, apply the
adjustments shown below the table.
VREF
The Reference Speed table contains flaps 40, 30, and 15 landing speeds for
a given weight. Apply wind correction shown as required.
Flap Maneuver Speeds
This table provides the flap speed schedule for recommended maneuvering
speed. The speed schedule is a function of weight and will provide
adequate maneuver margin above stall at all weights.
During flap retraction/extension, movement of the flap to the next position
should be initiated when reaching the maneuver speed for the existing flap.
December 06, 2002
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