Piper Seminole Systems

Question 1

Engines

Answer 1

Lycoming
360 cubic inches
180 horsepower
4-cylinder
Horizontally Opposed
Air Cooled
Normally Aspirated
Direct Drive

Question 2

Carburetor icing

Answer 2

-5° to 20° C (20° to 70° F)
High moisture
Engine roughness and drop in manifold pressure

Question 3

Propeller

Answer 3

Hartzell two-bladed
Controllable pitch
Constant Speed
Full feathering metal propellers

Question 4

Controllable Pitch

Answer 4

Controls RPM by varying pitch of propeller blades
Propeller controller forward:
Oil pressure increased by propeller governor, drives piston to move propeller to low pitch- high RPM/unfeathered
Propeller controller aft:
Oil pressure decreased by propeller governor. Nitrogen-charged cylinder, spring, and centrifugal counter weights to drive blades to a high pitch- low RPM/feathered

Question 5

Constant Speed

Answer 5

Once RPM selected (blue handles), propeller governor automatically varies oil pressure in the propeller hub to adjust propeller pitch as necessary to maintain constant RPM
So changes in manifold pressure and flight attitude will not change RPM