TWIN COMANCHE C/R
CAUTION
Use controls promptly to counteract any rolling or yawing action
of the airplane during the approach to and recovery from the stall.
The stall warning system is inoperative if the master switch is off.
An increase in bank
angle increases the stalling speed.
SPINS
All spins are prohibited, however
in the event an unintentional spin is encountered recovery can be
NOTE
accomplished by immediately using the following procedures:
;:
Retard both throttles to the idle position.
Apply full rudder in the opposite direction to the spin.
C.
Push control wheel full forward. While it is not necessary for recovery, the use of ailerons against
the turn (i.e. right aileron if spin is to the left) will expedite recovery.
d. Maintain controls in these positions until the spin stops. Then neutralize rudder and ailerons.
e. Recover from dive with smooth back pressure on the control wheel. No abrupt control
movement should be used during recovery from the dive, as the maneuvering speed and positive limit
maneuvering load factor may be exceeded.
NOTE
Altitude loss in a spin may be in excess of 2000 feet. Avoid any
maneuver which might result in a spin at low altitude. The more
rapidly spin recovery is begun the more prompt the recovery will
be.
CRUISING
The cruise power concept now possible with Lycoming engines permits more efficient use of the
available horsepower. Simplified power management allows a more constant manifold pressure and
eliminates contmual reference to power charts.
Refer to Power and Performance charts for power settings. Do not exceed
-pressure below 2400 RPM.
28 inches of manifold
To INCREASE power, fust increase RPM; then increase manifold pressure.
To DECREASE power, frost decrease manifold pressure; then decrease RPM.
To obtain the desired cruise, set the manifold pressure and RPM according to
1 For information on leaning procedure see Avco-Lycoming Operator’s Manual and
-
the power setting table.
current Avco-Lycoming
I
Service Instructions. Also see “AvcoLycoming Leaning Procedures for Twin Comanche C/R Engine” on
Page 9.
During climbing operation the servo regulator wiIl sense the change in altitude and will automatically
lean the mixture. For better economy, manual leaning with the mixture control can be accomplished.
PAGE 8
OPERATING INSTRUCTIONS
ISSUED: June 1,197O
REVISED: March 17,197l
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