Quantcast Enroute Descent - P-340_wch40084

 

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CHAPTER THREE CHG 2
T-34C INSTRUMENTS
h.
Common Errors (Applicable to straight and level also.)
i.
Over controlling the nose­the tendency is to note a climb (or descent) on the
altimeter and VSI and slowly displace the stick until the pressure instrument
reacts in the opposite direction. Equate the rate of on the VSI to amount of stick
movement; move the stick a specific amount and then have the patience to allow
the instruments to react.
ii.
Not referencing the turn needle during nose corrections.
iii.
Not anticipating the "lag" in the turn needle.
4.
Enroute Descent
a.
The partial panel enroute descent is a cruise descent using 500 ft­lbs while
maintaining constant airspeed and wings level. The attitude control instruments are
turn needle and balance ball for the wing, and the airspeed for the nose.
b.
Remember that the absence of the basic attitude instrument (gyro) makes it
considerably more difficult to determine the attitude corrections necessary.
Extremely light, smooth control pressures must be exerted and perfect trim is
required. You will have to "feel" the amount of nose attitude change.
c.
Again, we will use the "feel" developed in full panel. For a descent, perform P.A.T.,
reduce power to 500 ft­lbs torque and lower the nose by releasing back pressure on
the control stick. Reduce control pressures with trim tabs as necessary to maintain
150 knots, wings level. While performing P.A.T., scan the turn needle to confirm that
the wings remain level during the transition.
d.
Add power to approximately 650­700 ft­lbs torque when 100 feet above level off
altitude and smoothly raise the nose by applying slight back pressure on the stick.
Reduce control pressures with trim tabs as necessary to maintain normal cruise.
e.
Scan
Wing Attitude
­­­­­­­­­­
Turn needle/ball
Nose Attitude
­­­­­­­­­­
Airspeed
Performance
­­­­­­­­­­
Altimeter/VSI
Additional
­­­­­­­­­­
Torque
f
Common Errors
i.
Improper P.A.T. principle usage.
ii.
Not "moving" the stick to a position and stopping it, but instead moving the
controls until the instruments react.
3-42 BASIC INSTRUMENTS FLIGHT PROCEDURES


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