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Convair CV-240 with R-2800-CA18 engines - Handling Notes  4/2009
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NOTE:  This file is to be used only if the plane's aircraft.cfg file has been altered to activate working Supercharger Switches, and the panel includes them.

The two Pratt & Whitney R-2800-CA18 Double Wasp engines are carburetted and highly supercharged. They are optimised for use from high altitude runways. 2400hp is available for TOGA below 7600 QNH for a maximum of two minutes using water/methanol injection (ADI) for emergency cooling. The constant speed propellers can be feathered and have reverse pitch.

AUTOMIXTURE - SET AUTOMIXTURE ON in realism screen. 

TAKE OFF ABOVE 3000 QNH - all take offs and go arounds above 3000 QNH must be performed with HIGH SUPERCHARGER and the engine derated to METO RPM (2600). Failure to retard RPM to 2600 may reduce thrust. For every 200 feet above 7600 QNH reduce payload by 200 pounds (1 passenger plus bags).

WARNING - MAX safe RPM in HIGH supercharger gear = 2600  

DRY TAKE OFF using no more than MAP = 53.5 to prolong engine life is permitted at any weight and any altitude.

CARB HEAT - When MAP < 29 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.

FUEL LOAD - Default and maximum fuel load is 9,300lbs of 130 Octane AVGAS. PPH values below are for planning purposes using the 2008 Propliner Tutorial. A CalClassic Notepad (CCN) gauge is provided and can be used instead. Adjust fuel and payload according to trip length using the fuel and payload menu within FS9.

OPERATIONAL CEILING (OC) - The original purchasers of the CV240 cruised using design cruise power for a while but they and all second users soon adopted reduced cruise power to increase safety margins. A CCN gauge is provided. Use it to determine current OC more accurately than the VSII criteria cited below and pitch criteria cited within the 2008 Propliner Tutorial. A CCN gauge replicates calculations provided by your crew to inform your captaincy decisions. 

WARNING - CRITICALLY WEAK STRUCTURE - This aircraft may suffer structural failure during cruise in cold air. 

WARNING - NO MACHMETER - NO BARBER POLE - OBSERVE ALL IAS RESTRICTIONS WITH CARE

Note: Calclassic panels load with a barber pole to assist inexperienced users. Click on ASI to remove this cheat mode.

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HANDLING THE AIRCRAFT (phase by phase)

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Take Off Phase: 

BRAKES = ON 

MIXTURE = AUTO in realism screen

CARB HEAT = COLD

COWLS = MID

ADI & autofeather = ARM

TRIM = TAKE OFF 

FLAP = STAGE 1

AIRFIELD ALT BELOW 3000 ft use LOW Supercharger & FULL FINE PROPS
 
AIRFIELD ALT ABOVE 3000 ft use HIGH Supercharger & set 2600 RPM using 30" MAP

>>>>>>>>>>>>>>
Above 7600 QNH
REDUCE PAYLOAD
>>>>>>>>>>>>>>

CALL for EMERGENCY POWER 

STOP WATCH = START

FULL THROTTLE 

>>>>>>>>>>>>>>>>>>>>>>>>>>>
DRY TAKE OFF SET MAP = 53.5
>>>>>>>>>>>>>>>>>>>>>>>>>>>

BRAKES = OFF

ROTATE at 102 KIAS   (@ 42500lbs) 

Establish positive rate of climb

GEAR = UP 

ACCELERATE > 130 KIAS <= 500 ft/min

FLAP = UP

ACCELERATE = 150 KIAS <= 500 ft/min

@ 150 KIAS else after MAX 110 SECONDS

CALL for METO Power

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Climb phase 1 - Obstacle Clearance - METO Power: 

COWLS = MID

MAP = 47

RPM = 2600 

STOP WATCH = STOP

ADI & autofeather = DISARM

150 KIAS

SUPERCHARGER to HIGH when THROTTLE => 95% FULL at target MAP

Above all obstacles 

CALL for (max) climb power

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Climb phase 2 - ATC restrictions - Max climb power: 

COWLS = MID

MAP = 42

RPM = 2400

150 KIAS  

SUPERCHARGER to HIGH when THROTTLE => 95% FULL at target MAP

Above all ATC restrictions

CALL for normal climb power

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Climb phase 3 - Climb power:

COWLS = MID

MAP = 39 

RPM = 2400

VSII = 500  

SUPERCHARGER to HIGH when THROTTLE => 95% FULL at target MAP

If IAS < 150

Begin semi circular cruise phase:

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Econ cruise:

WARNING - NO MACHMETER or BARBER POLE

> FL220 DO NOT EXCEED 172 KIAS 
> FL200 DO NOT EXCEED 182 KIAS 
> FL180 DO NOT EXCEED 192 KIAS 
> FL160 DO NOT EXCEED 202 KIAS 

COWLS = CLOSED

MAP = 34

RPM = 2300

SUPERCHARGER to HIGH when THROTTLE => 95% FULL at target MAP

Plan 1100 PPH

Yields 240 KTAS at FL190

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Design (first user) Cruise: 

WARNING - NO MACHMETER or BARBER POLE

WARNING - MAY CAUSE STRUCTURAL FAILURE

> FL200 DO NOT EXCEED 182 KIAS 
> FL180 DO NOT EXCEED 192 KIAS 
> FL160 DO NOT EXCEED 202 KIAS 

COWLS = CLOSED

MAP = 37

RPM = 2300

SUPERCHARGER to HIGH when THROTTLE => 95% FULL at target MAP

Plan 1250 PPH

Yields 249 KTAS at FL180

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Max Cruise power: 

Use to battle significant headwinds

WARNING - NO MACHMETER or BARBER POLE

WARNING - MAY CAUSE STRUCTURAL FAILURE

> FL200 DO NOT EXCEED 182 KIAS 
> FL180 DO NOT EXCEED 192 KIAS 
> FL160 DO NOT EXCEED 202 KIAS 

COWLS = CLOSED

MAP = 39

RPM = 2300

SUPERCHARGER to HIGH when THROTTLE => 95% FULL at target MAP

Plan 1350 PPH

Yields 255 KTAS at FL160

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Low Level Cruise Power <= FL120:

COWLS = CLOSED

MAP = 35

RPM = 2300

SUPERCHARGER = LOW

Plan 1100 PPH

Yields 218 KTAS at FL120

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Descent phase:

Maintain CRUISE RPM

Target CRUISE IAS

WARNING - NO MACHMETER or BARBER POLE

> FL220 DO NOT EXCEED 172 KIAS 
> FL200 DO NOT EXCEED 182 KIAS 
> FL180 DO NOT EXCEED 192 KIAS 
> FL160 DO NOT EXCEED 202 KIAS 
> FL140 DO NOT EXCEED 212 KIAS 
> FL120 DO NOT EXCEED 222 KIAS 
> FL100 DO NOT EXCEED 232 KIAS 
> FL080 DO NOT EXCEED 242 KIAS 
< FL076 DO NOT EXCEED 244 KIAS 

*AVOID SHOCK COOLING*

See 2008 Propliner Tutorial

COWLS = CLOSED

SUPERCHARGER to LOW passing FL120

REDUCE MAP @ 3 inches per minute

When MAP < 25

RPM = 2100

MAP => 21

REDUCE = 170 KIAS

CARB HEAT = as above

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Arrival phase: 

COWLS = CLOSED

See CARB HEAT below

RPM = 2100

MAP => 21 inches 


Before IAF / Hold:

REDUCE < 170 KIAS


Descending in Hold:

DO NOT EXCEED 173 KIAS
VSI to comply


Before commencing approach:

REDUCE < 155 KIAS

FLAP = STAGE 1

COWLS = MID

135 KIAS

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Approach phase:

Before Glidepath:

LANDING LIGHTS = DEPLOY 

LANDING LIGHTS = ON

ADI & autofeather = ARM

RPM = 2300

MAP => 23 inches


Just before G/P: 

FLAP = STAGE 2

120 KIAS


On intercepting glidepath:

GEAR = DOWN

MAP => 23


In time to achieve Vref:

FLAP = STAGE 3

>>>>>>>>>>>>>>
MAX STOL ONLY 
FLAP = STAGE 4
Vref = 98
>>>>>>>>>>>>>>

CARB HEAT = COLD

Vref = Cross boundary 102 KIAS  (@ 39,800lbs) 
(below 50 QFE MAP < 23 allowed)


FLARE and LAND

After landing phase see below

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Circuit phase:

High Performance Visual Circuit:

(see 2008 Propliner Tutorial)

CARB HEAT as above


Before Downwind Join:

RPM = 2100

MAP => 21 inches (MIN)

COWLS = MID

REDUCE < 155 KIAS

FLAP = STAGE 1

135 KIAS


Downwind:

RPM = 2300

MAP = 23 

FLAP = STAGE 2

130 KIAS

MAP => 23

ADI & autofeather = ARM


Base Leg:

LANDING LIGHTS = DEPLOY 

LANDING LIGHTS = ON

RPM = 2300

MAP => 23 inches (MIN)

GEAR = DOWN

120 KIAS

Begin final turn 700 QFE


Final:

In time to achieve Vref

FLAP = STAGE 3

>>>>>>>>>>>>>>
MAX STOL ONLY 
FLAP = STAGE 4
Vref = 98
>>>>>>>>>>>>>>

CARB HEAT = COLD


Vref = Cross boundary 102 KIAS  (@ 39,800lbs) 

(below 50 QFE MAP < 23 allowed)

FLARE and LAND

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After landing phase:

AFTER NOSEWHEEL CONTACT

RPM = MAX

REVERSE SCREW PITCH as required

FLAPS = UP

WHEN 40-50 KTS:

FORWARD SCREW PITCH                              

WHEEL BRAKES as required

COWLS = FULL OPEN

ADI & autofeather = DISARM

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