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Pilot's Handling Notes for I-ASTI a Savoia Marchetti S.73
with Wright Cyclone F52 engines
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The three Wright Cyclone F52 engines have automated
mixture controls, and manually applied carb heat controls. They are
supercharged to give rated power up to 1750 metres.
CAUTION - Each engine can briefly deliver 875hp for take
off, or go around, below 1200 metres, provided military grade leaded 87 Octane
AVGAS has been loaded within the applicable TOGA tank for each engine.
CAUTION - In the event that a take off or go around must
be conducted using 76 octane airline grade fuel, power applied must not exceed
Rated power.
RESTRAIN - RPM < 2000 at all times
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 4480lbs of AVGAS
to allow operation over the real route flown by this aircraft. YOU must choose
which grade of AVGAS to simulate during each take off.
Crew and passengers have oxygen masks permitting design
cruise at 4000 metres. At low weights cruising at 5000 metres will be more
appropriate.
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
IF leaded 87 Octane AVGAS loaded
THROTTLES = FULL
ELSE IF unleaded 76 Octane AVGAS loaded
THROTTLES = 1.2 Ata MAX
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 = 1.2
190 KmIAS
Above all obstacles
Call for Climb power
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Climb power:
Plan 1000 PPH
Ata = 1.1
200 KmIAS
On reaching 4000 metres
Call for cruise power
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Max Cruise:
Ata = 0.95
Plan 850 PPH
Note: Yields 186 KTAS at FL99 (3Km)
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Fast (Design) Cruise:
Ata = 0.875
Plan 750 PPH
Note: Yields 181 KTAS at FL131 (4Km)
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Econ Cruise:
Ata = 0.8
Plan 650 PPH
Note: Yields 170 KTAS at FL131 (4Km)
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Descent:
AVOID - shock cooling
Reduce MAP 0.1 Ata per minute MAX
RESTRAIN RPM < 2200
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
Final
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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