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Pilot's
Handling Notes for a Savoia Marchetti S.M.81 with Piaggio X/RC15 engines
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The three
700hp Piaggio P.X/RC15 engines have automated mixture controls, and manually
applied carb heat controls. Superchargers deliver rated power up to 1500
metres. This engine and airscrew combination require a rated rpm technique.
LEVEL or
DIVING WAR EMERGENCY ONLY = MAX 2475 RPM
LEVEL or
DIVING COMBAT RATING = MAX 2350 RPM
CLIMBING
and MAX for TRANSPORT, FERRY and TRAINING FLIGHTS = 2100 RPM
AUTOMIXTURE
- This engine has Automixture in real life. Turn automixture ON in the FS9
realism screen before flight.
Design
cruise altitude is 4000 metres.
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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
Climb power
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Climb
power:
Plan 750
PPH
C2 = max
0.95
RPM =
max 2100
200
KmIAS
On
reaching 4000 metres
Call for
design cruise power
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Design
and Econ Cruise:
RPM =
2100
Plan 570
PPH
Note:
Yields 146 KTAS at FL131 (4Km)
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Patrol:
RPM =
1900
Plan 540
PPH
Note:
Yields 133 KTAS at FL49 (1.5Km)
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Descent:
RPM -
RESTRAIN < 2350
MAX 310
KmIAS
OAT
<= 5C CARB HEAT = HOT
Plan 400
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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