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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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