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Normal Procedures SR20
Climb
Normal climbs are performed flaps UP (0%) and full power at speeds 5
to 10 knots higher than best rate-of-climb speeds. These higher
speeds give the best combination of performance, visibility and engine
cooling.
For maximum rate of climb, use the best rate-of-climb speeds shown
in the rate-of-climb chart in Section 5. If an obstruction dictates the use
of a steep climb angle, the best angle-of-climb speed should be used.
Climbs at speeds lower than the best rate-of-climb speed should be of
short duration to avoid engine-cooling problems.
• Note •
The engine is equipped with an altitude compensating fuel
pump that automatically provides the proper full rich mixture
for climb. The mixture for climb should be left full rich.
1. Climb Power .............................................................................SET
2. Flaps ................................................................................Verify UP
3. Mixture ......................................................................... FULL RICH
4. Engine Parameters ............................................................ CHECK
5. Fuel Pump................................................................................OFF
• Note •
Fuel BOOST should be left ON during takeoff and for climb as
required for vapor suppression with hot or warm fuel.
March 2010
Information Manual 4-19
Cirrus Design Section 4
SR20 Normal Procedures
Cruise
Normal cruising is performed between 55% and 75% power. The
engine power setting and corresponding fuel consumption for various
altitudes and temperatures can be determined by using the cruise data
in Section 5.
The selection of cruise altitude is made on the basis of the most
favorable wind conditions and the use of low power settings. These
significant factors should be considered on every trip to reduce fuel
consumption.
• Note •
For engine break-in, cruise at a minimum of 75% power until
the engine has been operated for at least 25 hours or until oil
consumption has stabilized. Operation at this higher power will
ensure proper seating of the rings, is applicable to new
engines, and engines in service following cylinder
replacement or top overhaul of one or more cylinders.
1. Fuel Pump ...............................................................................OFF
• Note •
The Fuel Pump may be used for vapor suppression during
cruise.
2. Cruise Power............................................................................ SET
3. Mixture ................................................................LEAN as required
4. Engine Parameters ........................................................MONITOR
• Note •
Fuel BOOST must be used for switching from one tank to
another. Failures to activate the Fuel Pump before transfer
could result in delayed restart if the engine should quit due to
fuel starvation.
5. Fuel Flow and Balance ..................................................MONITOR
March 2010
4-20 Information Manual
Section 4 Cirrus Design
Normal Procedures SR20
Cruise Leaning
The engine is equipped with an altitude compensating fuel pump that
automatically provides the proper full rich mixture. Because of this, the
mixture should be set to full rich to allow the aneroid to provide auto
leaning for the engine during all flight conditions. If additional cruise
leaning beyond that provided by the aneroid is desired, be advised that
there may not be a 75° temperature rise from full rich to peak. This is
acceptable provided the airplane is at 75% power or less and engine
temperatures are within limits.
• Caution •
If moving the mixture control from the full rich position only
decreases the EGT from the full rich value, place the mixture
control back in the full forward position and have the fuel
system serviced.
• Note •
Serials 1337 thru 1581 with SRV standard configuration: The
airplane is not equipped with an EGT/CHT gage. To lean the
engine for cruise, pull the mixture lever towards CUTOFF until
engine runs rough and then push the mixture lever towards
FULL RICH until engine operation smooths out.
Exhaust gas temperature (EGT) may be used as an aid for mixture
leaning in cruise flight. For “Best Power” use 75% power or less.
For “Best Economy” use 65% power or less. To adjust the mixture,
lean to establish the peak EGT as a reference point and then adjust
the mixture by the desired increment based on the following table:
　
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