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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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