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Enter in takeoff chart with wind and OAT.
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Read that MTOW on a DRY runway is 245 900 kg.
Step 2:
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Refer to the FCOM corrections, SPECIAL OPERATIONS chapter.
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5 mm of slush, use 6.3 mm (1/4 inch) slush data.
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Enter with airport runway length and configuration.
Step 3:
. Interpolate for the runway length, (read from the takeoff chart header that runway length is 3200 M), read the weight penalty: 24 800 kg.
Step 4:
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Apply the penalty on the MTOW DRY, get the corrected weight.
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Corrected weight equals 245 900 kg minus 24 800 kg, i.e. 221 100 kg.
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Step 5:
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Refer to the CONF 2 table.
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Read that MTOW SLUSH is equal to the corrected weight.
Step 6:
. Read the associated speeds. (Refer to the next higher weight, i.e. 230 t)
ANSWER METHOD 1:
MTOW SLUSH is 221 100 kg
V1 = 136, VR = 147 and V2 = 151.
Example of method 2: Takeoff chart dry + chart corrections
Step 1:
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Refer to the takeoff chart DRY.
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Enter in takeoff chart with wind and OAT.
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Read that MTOW on a DRY runway is 245 900 kg and associated speeds are 159/62/67
Step 2:
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Refer to the chart corrections.
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Read 23 200 kg and -16/-12/-12
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ANSWER METHOD 2:
MTOW SLUSH is 245 900 kg - 23 200 kg equals 222 700 kg. V1 = 159 - 16 = 141 kt VR = 162 - 12 = 150 kt V2 = 167 - 12 = 155 kt
Example of method 3: Takeoff chart contaminated
Step 1 AND ANSWER METHOD 3:
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Refer to the takeoff chart SLUSH 1/4’’.
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Enter in takeoff chart with wind and OAT.
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Read that MTOW on a SLUSHY runway is 225 000 kg, and speeds are V1 = 142, VR = 152 and V2 = 155
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Example of method 4: Less Paper in the Cockpit
1 - Select Airport and runway. 2 - Select the conditions.
4- Read the MTOW and speeds
For the sake of simplicity the previous example does not cover:
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Takeoff speed determination,
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Flap setting optimization,
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Derate level optimization, and
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QNH, bleeds, MEL corrections.
The LPC program enables a very easy and quick determination of these parameters. The following example illustrates this:
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INPUT SCREEN
OUTPUT SCREEN
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Performance determination summary
Precision scale
More conservative More accurate
Difficulty of use
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本文链接地址：getting to grips with COLD WEATHER OPERATIONS 寒冷天气运行(61)
