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a320 Reactive Winshear activation question

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a320 Reactive Winshear activation question

Old 13th Mar 2018, 02:01
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a320 Reactive Winshear activation question

Hi everyone,

As per Fcom, the Reactive Winshear systems activates 3 sec after liftoff.

However, in the Mems items for W/S, it states that after V1, thrust toga, wait until Vr to rotate.

How can the FAC gives warning from V1 to Vr, when it only works 3 sec after lift off?

Thanks

Last edited by nj314; 13th Mar 2018 at 02:25.
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Old 13th Mar 2018, 02:14
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Reactive and predictive windshear alerting supplements our own judgment of windshear encounters.
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Old 13th Mar 2018, 02:24
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Originally Posted by RUMBEAR
Reactive and predictive windshear alerting supplements our own judgment of windshear encounters.
Pred WS is inhibited after 100kts.
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Old 13th Mar 2018, 04:37
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The FAC will not give a warning any warnings from 100kt till 50 ft

- Below 100kt: warning active
- Above 100 Kt: no warnings (pilot awareness)
- Below V1: reject the TO if large speed variations (pilot awareness)
- After V1 up to 50 Ft: no warnings (pilot awareness)

- Above 50 ft: warning active
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Old 13th Mar 2018, 08:40
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You don't need any warning on take off run. Just look at your speed trend arrow. The arrow head which usually disappears in the forward end of the speed tape will make it's appearance again and start playing tricks. That's when either reject or TOGA.
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Old 14th Mar 2018, 00:53
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thanks for your inputs. That confirms that there is no warining after 100kts, and it’s pilot decision to recognize windshear
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