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T-34C INSTRUMENTS
CHAPTER THREE
NOTE
Transition from 150 KIAS to 120 KIAS by reducing power to 300 ft­lbs.
Retrim.
3.
Common Errors
a.
Not using a three­second lead.
b.
Not relying on the wing attitude instrument (turn needle) but trying to fly
performance instruments. The turn needle is one of the most accurate instruments in
the aircraft­believe it. Remember, the performance checks are only readable every
30º.
c.
Unbalanced flight.
d.
Overcorrecting AOB­never greater than 20º or less than 10º for a One­Half SRT,
never greater than 30º AOB or less than 15º AOB for a SRT.
e.
Improper nose attitude, losing altitude.
305.
CONSTANT AIRSPEED CLIMBS AND DESCENTS
1.
Nearly all climbs and descents are performed at a constant airspeed or at least some climb
schedule. These particular maneuvers are performed in Vertical Performance Speed (VPS)
during initial instruction and are used as a basis for rate climbs and descents. The purpose of
these maneuvers is to emphasize that nose attitude controls airspeed in climbs and descents.
These descents and climbs are continued for 1000 feet of altitude change, followed by a
transition to a level off and a constant heading is maintained throughout the maneuver.
Obviously, the nose attitude crosscheck instrument is the airspeed indicator. The climbs and
descents are started on any numbered heading and thus the RMI remains the wing attitude
crosscheck instrument. Altimeter and VSI show performance. Utilize the PAT principle for all
transitions to climbs and descents.
Enter VPS from normal cruise by reducing power to 300 ft­lbs. Trim right rudder, nose up as
the aircraft decelerates in order to maintain attitude and heading throughout the transition.
Approaching 130 KIAS, adjust power to maintain 130 KIAS, and retrim. The VPS power setting
is approximately 550 ft­lbs; the VPS level flight nose attitude is approximatelynose up.
2.
Climbs
a.
Increase power smoothly towards 850 ft­lbs as you add a corresponding amount of
right rudder. Use peripheral vision to set power.
b.
As the power is being added, raise the nose to the VPS climbing attitude of
approximatelynose up.
BASIC INSTRUMENTS FLIGHT PROCEDURES 3-15


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