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 Pilot's Handling Notes for OO-AGL a Savoia Marchetti S.73 with GR9Kfr Mistral engines

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The three Gnome Rhone 9Kfr Mistral engines have automatic mixture controls, and are carburetted with manually applied carb heat controls. They are supercharged to give rated power up to 2300 metres.

 

ENSURE - AUTOMIXTURE = ON in the FS9 realism screen before operating Mistral engines.

 

Each engine can briefly deliver 770hp for take off, or go around, below 750 metres.

 

RESTRAIN - RPM < 2410 at all times

 

OXYGEN - This aircraft is designed to cruise at 3000 metres, but may cruise at 4000 metres as both crew and passengers have oxygen masks.

 

CAUTION - This aircraft has fragile flaps.

 

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Take Off:

 

FLAP = STAGE 1

 

CARB HEAT = COLD

 

TRIM = NEUTRAL

 

LINE UP

 

BRAKES = ON

 

THROTTLE slowly FULL

 

BRAKES OFF

 

YOKE - FULL FORWARD to raise tail

 

WHEN TAIL UP - ROTATE FIRMLY

 

Establish positive rate of climb

 

RESTRAIN CLIMB <= 3 m/s VSI

 

ACCELERATE = 150 KmIAS

 

FLAP = UP

 

ACCELERATE = 190 KmIAS

 

> 3 m/s VSI

 

Call for Rated power

 

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Rated power:

 

Ata = 1.0

 

190 KmIAS

 

Plan 975 PPH

 

Above all obstacles

 

Call for Climb power

 

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Climb power:

 

Ata = 0.9

 

200 KmIAS

 

Plan 800 PPH

 

On reaching 4000 metres

 

Call for pcruise power

 

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Max Cruise (3 x 420hp):

 

Ata = 0.7

 

Plan 700 PPH

 

Note: Yields 171 KTAS at FL131 (4Km)

 

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Design and Econ Cruise (3 x 360hp):

 

Ata = 0.633

 

Plan 600 PPH

 

Note: Yields 159 KTAS at FL131 (4Km)

 

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Descent:

 

MAX 310 KmIAS

 

RPM < 2410

 

AVOID - shock cooling

 

Reduce MAP 0.1 Ata per minute MAX

 

OAT <= 5C CARB HEAT = HOT

 

Plan 500 PPH

 

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Circuit, Approach and Landing:

 

 

(Before) Downwind leg

 

OAT <= 5C CARB HEAT = HOT

 

REDUCE < 200 KmIAS

 

FLAP = STAGE 1

 

 

Late Downwind

 

REDUCE < 175 KmIAS

 

FLAP = STAGE 2

 

LANDING LIGHTS - DEPLOY

 

 

Base Leg or Final

 

CARB HEAT = COLD

 

REDUCE < 150 KmIAS

 

FLAP = STAGE 3

 

 

Cross airfield boundary @ 110 KmIAS

 

THROTTLES = RETARD (IF REQUIRED)

 

(FLARE) ALWAYS LAND ON MAINWHEELS

 

WHEN TAIL SETTLES - YOKE FULL AFT

 

FLAP = UP

 

BRAKES - as required

 

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