User manual

Piper PA-31T Cheyenne X
Aerosoft GmbH 2007
100 101
100 101
Cruise
When cruise level is reached, apply recommended cruise power set-
tings, as indicated on the performance tables. For example, a typical
cruise in the Cheyenne I at FL240 means 833 ft-lb torque at 2000
RPM, which will result in around 230 kts TAS cruising speed. Some
Cheyenne models also differentiate between Maximum Cruise Power
(basically the maximum speed you can achieve) and Economy Cruise
Power, which offers the best trade between flight time and range.
Descent
During descent, a 3° descent angle is desired. To calculate the correct
top of descend, use this simple formula: Difference in flight level
divided by 10 and multiplied by 3 gives you the distance needed to
establish a 3° descend angle. The descent rate is calculated by ground
speed (GS) * 5.
Example: You want to descent from FL260 to FL120, and your ground
speed (GS) is 250 kts. According to our formula we need 42nm for the
descent (260 – 120 = 140. 140 / 10 x 3 = 42nm) with a sink rate of
1250 fpm (250 x 5 = 1250fpm).
In clean air you may want to accelerate your airspeed just below
the red line indicator which depicts the maximum allowed airspeed.
Reduce power settings as needed for the descent. When descend
is established, select the airfield elevation +500 feet on the cabin
altitude controller, and monitor the pressurization gauges for the cabin
altitude to drop. As torque increases during descent, reduce power
further to stay within limits. No-smoking and seatbelt signs may be set
as desired. Also, turn ON the landing lights just before entering the
approach phase.