Cirrus Design
Section 7
SR22T
Systems Description
P/N 13772-005
7-39
P/N 13772-005
7-39
Propeller
The airplane is equipped with a composite, three-blade, constant
speed, governor-regulated propeller.
The propeller governor automatically adjusts propeller pitch to
regulate propeller and engine RPM by controlling the flow of engine oil
- boosted to high pressure by the governing pump - to or from a piston
in the propeller hub. Oil pressure acting on the piston twists the blades
toward high pitch (low RPM). When oil pressure to the piston in the
propeller hub is relieved, centrifugal force, assisted by an internal
spring, twists the blades toward low pitch (high RPM). Any change in
airspeed or load on the propeller results in a change in propeller pitch
During climb and cruise, the governor automatically adjusts propeller
pitch in order to maintain a 2500 RPM setting
Original Issue
