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Pilot's Handling Notes for a Savoia Marchetti S.73 with
Alfa Romeo 126/RC10 engines
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The three Alfa Romeo 126 (late model Bristol Pegasus)
engines have automated mixture controls, and manually applied carb heat
controls. Weak superchargers deliver 800hp below 1000 metres. Each engine can
briefly deliver 850hp for take off or go around at sea level.
RESTRAIN RPM < 2300 at all times - These are military
engines running on airline grade fuel.
WARNING Allowing > 2300 RPM with airline grade fuel
may result in engine failure.
AUTOMIXTURE - This engine has Automixture in real life.
Turn automixture ON in the FS9 realism
screen before flight.
This aircraft is loaded by default with 4,480lbs of AVGAS
to allow the longest routes flown in real life to be flown in FS9.
Design cruise altitude is 3000 metres but operation at
4000 metres is permitted for up to 30 minutes per flight to avoid weather or
mountains.
AVOID - Vno = 310 KmIAS
CAUTION - This aircraft has fragile flaps.
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Take Off:
AUTOMIXTURE = ON (in FS9 realism options)
FLAP = STAGE 1
CARB HEAT = COLD
TRIM = SLIGHT POSITIVE
LINE UP
BRAKES = ON
THROTTLES = FULL
BRAKES = OFF
YOKE = FULL FORWARD to raise tail
TAIL UP - ROTATE FIRMLY
RESTRICT CLIMB <= 3 m/s VSI
ACCELERATE = 150 KmIAS
FLAP = UP
ACCELERATE = 190 KmIAS
WAIT FOR > 3 m/s VSI
Call for Rated power
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Rated power:
Plan 1200 PPH
Ata = 1.4
190 KmIAS
ABOVE all obstacles
Call for Climb power
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Climb power:
Plan 1000 PPH
Ata = 1.2
200 KmIAS
On reaching 3000 metres
Call for flight plan cruise power
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Max Cruise:
MAX 310 KmIAS
Ata = 1.1
Plan 840 PPH
Note: Yields 178 KTAS at FL66 (2Km)
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Design Cruise:
Ata = 1.0
Plan 720 PPH
Note: Yields 174 KTAS at FL98 (3Km)
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Econ Cruise:
Ata = 0.9
Plan 630 PPH
Note: Yields 166 KTAS at FL131 (4Km)
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Descent:
AVOID - shock cooling
RPM < 2300
Reduce MAP 0.1 Ata per minute MAX
MAX 310 KmIAS
OAT <= 5C CARB HEAT = HOT
Plan 500 PPH
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Approach Circuit and Landing:
Before Downwind leg
OAT <= 5C CARB HEAT = HOT
REDUCE < 200 KmIAS
FLAP = STAGE 1
Downwind
REDUCE < 175 KmIAS
FLAP = STAGE 2
LANDING LIGHTS - DEPLOY
In time to achieve Vref
REDUCE < 150 KmIAS
FLAP = STAGE 3
CARB HEAT = COLD
Vref = Cross airfield boundary @ 110 KmIAS
THROTTLES = RETARD (IF REQUIRED)
(FLARE) ALWAYS LAND ON MAINWHEELS only
WHEN TAIL SETTLES - YOKE FULL AFT
FLAP = UP
BRAKES - as required
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