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Windshear Avoidance Flying - Honeywell IntuVue RDR-4000 Pilot's Manual

3-d automatic weather radar system with forward looking windshear detection for airbus sa/lr aircraft
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IntuVue RDR-4000 Weather Radar Pilot's Guide

WINDSHEAR AVOIDANCE FLYING

The air shaft of a microburst creates problems for aircraft for two
reasons. The first problem is due to the downward air movement.
Since the aircraft is flying within the air mass, as the air mass plummets
earthward, so does the aircraft. Second, the lift that is generated by the
wing is related to the relative velocity of air traveling over the wing. If
the air velocity suddenly changes, so does the lift. When the lift is
reduced, the aircraft descends. As an aircraft enters a microburst,
depending on the point of entry, it will experience at least one of these
conditions and most probably both.
The key to surviving a microburst is to enter it at a high enough aircraft
energy state (high altitude and fast airspeed). The RDR-4000 system
provides a warning prior to encountering the windshear, significantly
improving the chances of surviving the encounter.
MICROBURST ENCOUNTER EXAMPLE
D201002000008
Principles of Weather Radar Use
Rev 1, December 2014
49

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