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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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