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AVionics Aircraft
How can an aircraft detect windshear and microbursts ?
Iv always wondered how can an aircraft do that , and input the signal to the EGPWS to get it to alert for windshear , i checked my school notes but nothing is mentioned about it in my notes alas .
Im an aircrafts maintanance engineering apprentice ( avionics ) by the way so i'd like to get a fully explained technical answer to satisify my question .
Thanks in advance
Essentially, there are two ways to detect windshear/microbursts using on-board systems.
PREDICTIVE: This is a part of the weather radar system that uses doppler to detect disturbed air. It is operational, even with the radar selected off, whenever the airplane is in the air below 2350 feet, when the radar is selected on, or on the ground with the power set to TO.
REACTIVE: This is part of the EGPWS which uses inputs from the Angle of Attack system, the ADIRUs, and the and Air Data Modules to detect uncommanded acceleration, and report windshear. This system uses different thresholds depending on the radio altitude, flap position, and phase of flight (approach or landing).
These are for the B756 and are similar, as I recall, for the B737, but may differ for other manufacturers and models. My airline installs both, but I have been led to believe that some airlines opt for one or the other.
Wiki gives a pretty good explanation.
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Used Aircraft Parts- Why Buy Used Aircraft Parts Instead Of New Parts
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About the Author
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