obstacle clearance is attained. After the obstacle has been cleared, accelerate to 79 KIAS and then slowly
retract the flaps.
A short field takeoff with no obstacle is accomplished with no flaps and applying full power before
brake release, lift off at 50 KIAS and accelerate to best rate of climb speed, 79 KIAS.
Takeoff from a soft field with an obstacle clearance requires the use of 25° flaps. Accelerate the
airplane and lift the nose gear off as soon as possible and lift off at the lowest possible airspeed. Accelerate
just above the ground to 52 KIAS to climb past obstacle clearance height. Continue climbing while-
accelerating to the best rate of climb speed, 79 KIAS and slowly retract the flaps.
For a soft field takeoff without an obstacle to clear, extend the flaps 25°, accelerate the airplane and
lift the nose gear off as soon as possible. Lift off at the lowest possible airspeed. Accelerate just above the
ground to the best rate of climb speed, 79 KIAS and retract the flaps while climbing out.
4.25 CLIMB
The best rate of climb at gross weight will be obtained at 79 KIAS. The best angle of climb may be
obtained at 63 KIAS. At lighter than gross weight these speeds are reduced somewhat. For climbing en
route, a speed of 87 KIAS is recommended. This will produce better forward speed and increased visibility
over the nose during the climb.
When reaching the desired altitude, the electric fuel pump may be turned off.
4.27 CRUISING
The cruising speed is determined by many factors, including power setting, altitude, temperature,
loading and equipment installed in the airplane.
The normal maximum cruising power is 75% of the rated horsepower of the engine. Airspeeds which
may be obtained at various altitudes and power settings can be determined from the performance graphs
provided by Section 5.
Use of the mixture control in cruising flight reduces fuel consumption significantly, especially at
higher altitudes, and reduces lead deposits when the alternate fuels are used. During letdown and low power
flight operations, it may be necessary to lean because of excessively rich mixture. The mixture should be
leaned during cruising operation when 75% power or less is being used. If any doubt exists as to the amount
of power being used, the mixture should be in the FULL RICH position for all operations. Always enrich the
mixture before increasing power settings.
To lean the mixture, disengage the friction adjustment lever and pull the mixture control until the
engine becomes rough, indicating that the lean mixture limit has been reached in the leaner cylinders. Then
enrich the mixture by pushing the control towards the instrument panel until engine operation becomes
smooth. When leaning, carefully observe the temperature instruments.
Always remember that the electric fuel pump should be turned “ON” before switching tanks, and
should be left on for a short period thereafter. In order to keep the airplane in best lateral trim during
cruising flight, the fuel should be used alternately from each tank. It is recommended that one tank be used
for one hour after takeoff, then the other tank be used for two hours; then return to the first tank, which
ISSUED: DECEMBER 16, 1976
REPORT: VB-880
REVISED: APRIL 25, 2005
4-13
PIPER AIRCRAFT CORPORATION
SECTION 4
PA-28-161, CHEROKEE WARRIOR II
NORMAL PROCEDURES
Содержание CHEROKEE WARRIOR II
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