Quantcast Straight and Level Flight - P-340_wch40082

 

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CHAPTER THREE CHG 2
T-34C INSTRUMENTS
b.
Scan pattern summary:
Wing Attitude ­ There is considerable delay in the turn needle. Center the aileron
inputs and let the turn needle settle down" when determining wing attitude.
Nose Attitude ­ If a change in nose attitude instruments is evident, crosscheck the
performance instrument(s) and make appropriate attitude/power adjustments. Scan
additional instruments with peripheral vision as necessary.
2.
Straight and Level Flight
a.
The "attitude control" instruments for the nose are the VSI and altimeter. The
"attitude control" instruments for the wings are the turn needle and balance ball. The
airspeed indicator is the performance instrument. Use your peripheral vision to
simultaneously monitor the turn needle, VSI and altimeter for movements. The
magnetic compass is an additional instrument and will be used only during straight
and level, non­acceleration flight.
b.
Corrections for altitude will be made with the same smooth control movements made
in full panel flight. For example, when the need for a nose attitude change becomes
evident from VSI and altimeter, note the amount of change needed. The
descent/climb must first be stopped by exerting light (fingertip) control movements,
stabilizing the VSI to zero. Any attempt to correct without first stabilizing will result
in pilot­induced oscillations of increasing amplitude; causing an out­of­control
situation. The key to good partial panel flying is:
i.
Intelligent control movements based on observed rates indicated by the
instruments.
ii.
Patience in returning to altitude and airspeed (remember, pressure instruments
lag).
iii.
Use of the peripheral scanning techniques.
iv.
Proper trim.
When correcting for nose attitude, attention must still be given to the turn
needle/balance ball so as not to compound the errors.
c.
Corrections for the wing position will be made by exerting light, smooth pressure on
the stick to return the turn needle to the center. For example, while scanning the
instruments a slight turn is noticed by the turn needle moving away from center.
First, stop the movement by centering the turn needle. Remember, the turn needle
lags so control inputs must be smooth and light, not large and jerky. Once the turn
needle is centered, determine the number of degrees off heading from the magnetic
compass. Corrections to return to the desired heading for straight, constant heading
flight will be accomplished by using a timed turn.
3-40 BASIC INSTRUMENTS FLIGHT PROCEDURES


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