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Pilot's Handling Notes for a Fiat G.12LB with Bristol Pegasus 48
engines
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The three 720hp Bristol Pegasus 48 engines drive constant speed
airscrews. They have automated mixture controls and manually
applied carb heat controls. Superchargers sustain that rated
power up to 4400 metres. Each engine can deliver 1010hp for up to
five minutes for TOGA at sea level. The British engines and
screws turn CCW causing swing to the right. The virtual flight
engineer will operate the oil cooler shutters and select the
appropriate supercharger gear ratio throughout the flight
according to the engine RPM demanded, current altitude and the
weather. The engine cowl flaps are under pilot control in this
simulation.
AUTOMIXTURE - This engine has automixture in real life and in
MSFS.
The manifold pressure gauges of this aircraft are calibrated in
Kg/Cm^2 abbreviated C.
CARB HEAT - When C < 0.8 and OAT < +5C apply CARB HEAT for
30 seconds every few minutes to clear carb ice. Use of CARB HEAT
CAUSES significant LOSS OF POWER.
Maximum fuel load is 7,116lbs of 100/130 Octane AVGAS. This is
loaded by default in FS9 to allow the longest routes flown in
real life, but restricts payload to eleven passengers plus bags.
Post war design cruise altitude is 3000 metres. Operational
ceiling is always higher.
The landing gear is approved for use from unpaved (but not
unprepared) surfaces. This aircraft has full STOL capability.
Read 'How to fly the Fiat G.12' before flight.
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Take Off phase:
AUTOPILOT = OFF
FLAP = STAGE 1 (one light)
CARB HEAT = COLD
COWLS = 40%
ELEVATOR TRIM = 1 unit cabrata
RUDDER TRIM = sinistra
RPM = MAX
LINE UP
TAILWHEEL LOCK = ON
BRAKES = ON
THROTTLES = FULL
BRAKES = OFF
YOKE = FULL FORWARD to raise tail
TAIL UP - ROTATE FIRMLY
POSITIVE RATE OF CLIMB
GEAR = UP
ACCELERATE = 170 KmIAS
FLAP = UP
ACCELERATE = 210 KmIAS
Call for METO power
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Obstacle Cleranace phase - METO power:
C = 1.25
RPM = 2400
210 KmIAS
COWLS = 40%
Above all obstacles
Call for climb power
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Climb phase power:
VSI <= 3.5 m/s
RPM = 2250
C = 1.09
220 KmIAS
RESTRAIN C to achieve targets above
COWLS = 40%
On reaching 3000 metres
Call for Econ cruise power
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Econ cruise power:
C = 0.875
RPM = 2000
COWLS = CLOSED
Plan 660 PPH
Note: Yields 155 KTAS at 3000M (FL98)
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Max Cruise:
Use to battle headwinds
C = 1.03 (zero PSI boost)
RPM = 2250
COWLS = 20%
Plan 1000 PPH
Note: Yields 190 KTAS at 3000M (FL98)
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Descent phase:
*DO NOT EXCEED -3.5 m/s*
Retain CRUISE RPM
Target prior cruise IAS
DO NOT EXCEED 350 KmIAS
*AVOID SHOCK COOLING*
C reduce @ 0.1 per minute
C => 0.5 (*MIN*)
COWLS = CLOSED
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Holding phase:
FLAP = UP
RPM = 2000
C = as required to achieve
220 KmIAS
COWLS = as required
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Approach Circuit and Landing phase:
C => 0.5 until over boundary fence
*Before Glidepath or Circuit*:
C = 0.5
REDUCE = 170 KmIAS
COWLS = 40%
GEAR = DOWN
FLAP = STAGE 1 & 2 (two lights)
RPM = 2300
C as required to sustain
170 KmIAS
Downwind:
170 KmIAS
Base Leg:
C => 0.5 as required to
Turn final @ 160 KmIAS
Final:
CARB HEAT = COLD
In time to achieve Vref
FLAP = STAGE 3 (four lights)
Cross airfield boundary @ 140 KmIAS (all weights)
C < 0.5 allowed
FLARE
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After landing phase:
After mainwheel contact
CORRECT any drift
PULL TAILWHEEL GENTLY INTO CONTACT
YOKE FULL AFT
COWLS = FULL OPEN
FLAP = UP
BRAKES = as required
TAILWHEEL = UNLOCK before taxi
RPM = MAX before taxi
Nose engine = SHUT DOWN
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