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Pilot's Handling Notes for a Savoia Marchetti S.M.81 with
Alfa Romeo 125/RC35 engines
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The three 650hp Alfa Romeo 125/RC35 (Bristol Pegasus)
engines have automated mixture controls, and manually applied carb heat
controls. Each engine can briefly deliver 680hp for TOGA and war emergency use
below 3500 metres.
This engine and airscrew combination require a rated rpm
technique.
LEVEL or DIVING WAR EMERGENCY ONLY = MAX 2300 RPM
LEVEL or DIVING COMBAT RATING = MAX 2200 RPM
CLIMBING and MAX for TRANSPORT, FERRY and TRAINING
FLIGHTS = 2090 RPM
AUTOMIXTURE - This engine has Automixture in real life.
Turn automixture ON in the FS9 realism screen before flight.
Design cruise altitude is 5000 metres.
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Take Off:
AUTOMIXTURE = ON (in FS9 realism options)
FLAP = STAGE 1
CARB HEAT = COLD
TRIM = 10% 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
RESTRICT - Rated Power
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Rated and Climb power:
Plan 900 PPH
THROTTLE = FULL
RPM <= 2090
190 KmIAS
On reaching 5000 metres
Call for cruise power
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Tactical Cruise:
C2 = MAX 0.9
RPM = MAX 2200
Plan 730 PPH
Note: Yields 164 KTAS at FL164 (5Km)
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Econ Cruise:
C2 = MAX 0.8
RPM = MAX 2090
Plan 600 PPH
Note: Yields 145 KTAS at FL164 (5Km)
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Descent:
MAX 310 KmIAS
RPM = MAX 2090
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
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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