UAV-1003946-001, AV-30-C
Pilot’s Guide
45
Revision D
Page
airspeed and vertical speed) is also 10 degrees upward, the equivalent
AoA is 0 degrees. If, however, the pitch angle is 10 degrees upward, and
the aircrafts flight path through the air is only 5 degrees, this corresponds
to a positive 5-degree AoA.
A second example is where the pitch is 0 degrees, but the aircraft is
descending. The AoA is then equivalent to the descent angle, which will be
a negative AoA.
11.2 Configured Limits
As each aircraft make and model has different flight characteristics and
post-production modifications such as altered wing tips, performance kits
and other related modifications may change the flight dynamics of the
aircraft, each aircraft has unique configuration limits that must be set for
proper AoA operation.
An upper and lower configuration limit is pilot adjustable and provides the
scaling mechanism for individual aircraft flight characteristics as it relates
to the corresponding AoA display.
The setting of these configuration limits is implemented with a
pilot-lockout feature that prevents inadvertent modification.
The upper near-stall configuration limit is set when the aircraft is in the
“base-to-final” configuration with flaps and gear set to their normal
positions for this maneuver. This provides the best protection when the
aircraft is low-and-slow, and the pilot may inadvertently stall based on
over-corrections.
•
The upper limit is configured to coincide with the aircrafts existing stall
warning system and is typically on the order of 10 to 15 degrees. This
visually correlates to the first red bar on the AoA display with the
second (upper most) red bar providing indication for operation between
the aircrafts stall warning and actual stall point.
•
A lower limit is configured to coincide with the AoA at which the aircraft
flies under normal cruise conditions. This is typically on the order of 3
to 4 degrees. This visually correlates to the lowest one or two green
bars on the AoA display.
