Certified Flyers II
Duchess Multi-Engine Study Guide
LOAD FACTORS (3900 lbs)
Positive maneuvering load factors:
Negative Maneuvering load factor:
KINDS OF OPERATION
1. VFR day and night
2. IFR day and night
3. FAR part 91 operations when all pertinent limitations and performance considerations
are complied with
Warning: Flight into known icing conditions prohibited.
ENGINES
Two Avco Lycoming Engines are installed; one O-360-A1G6D (clockwise rotating) located on
the left wing and one LO-360-A1G6D (counterclockwise rotating) located on the right wing. The
engines are four-cylinder, direct drive, horizontally opposed, and each rated at 180 horsepower at
2700 rpm. The engines use a wet sump pressure type oil system with a maximum of 8 qts and a
minimum of 5 qts.
The engine is equipped with a carburetor heat system which allows heated unfiltered air to enter
the induction system to alleviate the possibility of induction ice. Cowl flaps are controlled by
levers inside the cockpit; they allow the amount of engine cooling air to be controlled to maintain
a desired cylinder head temperature. Engine ignition is provided through a dual engine driven
magneto system which is independent of the electric system (if electrical power is lost, engine
will continue to run).
Each engine is equipped with a fuel pressure gauge, oil pressure, oil temperature, cylinder head
temperature, manifold pressure, rpm, and exhaust gas temperature.
Take-off and Maximum
Continuous Power
Maximum Cylinder Head Temp
Minimum Oil Pressure (idle)
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