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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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