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hidden click zone can be pressed to automatically calculate and set the
V-bugs on the airspeed indicator (ASI).
Bild 11: Verborgener Klickspot um die Speed Bugs zu setzen
Clicking this hidden zone while on the ground will set the V-bugs to the
following speeds:
SimCheck Airbus A300B4-200
Aerosoft GmbH 2010
20
• White: V1
Speed up to which the pilot can decide to abort the take-off
following critical failure (e.g. engine fire): Either to continue the
take-off run within the limits of available takeoff runway length,
or to stop the aircraft within the limits of available runway
length. After V1 the pilot has to continue with the takeoff. Note:
The gauge makes the calculations based on a 8500 feet runway.
• Orange speed bug: V2
Takeoff safety speed reached before the altitude of 35 feet
with one engine failed
• Green: V3
Equal to 1.2x Vs (stall speed) with slats extended/flaps 0°. It
is the minimum speed at which the flaps may be raised to 0°
during the level acceleration at safety height after an engine
failure after V1
• Yellow: V4
Equal to 1.25x Vs of slats 0°/flaps 0°. It is the minimum speed
at which the slats may be retracted to 0° in the same situation
as V3 on one engine
• Red: VFTO
Final take-off speed to be reached on one engine at the end of
the level acceleration and allowing best climb. On the A300B4 this
is equal to 1.45x Vs in clean configuration. De facto this should be
used as the minimum clean speed when requested by ATC
When airborne, clicking the hidden click zone on the ASI will set the
bugs to the following speeds:
• Red: VFTO
• Yellow: V4
• Green: V3
• Orange: not set automatically, has to be set via the autothrottle
speed window
• White: Vapp (approach speed). Minimum landing speed using
in full flaps/slats configuration and in zero-wind conditions
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You can also manually drag the speed bugs to the desired position. To
do so, left click on the location of the speed bug you want to drag and
move the bug while pressing down the left mouse button.
Figure 12: Click and drag speedbugs
MAXIMUM SPEEDS
The A300 is quite sensitive to overspeed situations with flaps extended.
• Maximum slat speed: 250 kts
• Maximum speed flap 8: 215 kts
• Maximum speed flap 15: 200 kts
• Maximum speed flap 25: 180 kts
• Overspeed will result in a clacker sound warning.
SimCheck Airbus A300B4-200
Aerosoft GmbH 2010
22
PARKING BRAKES
The parking brakes in the A300B4-200 are fed by a subsystem of the
YELLOW hydraulic system. The yellow system is pressurized by the
right engine (engine number 2) and a minimum pressure is required
before the parking brakes will work. Off course it wouldn’t make
sense if you had to start the engines before the parking brakes could
be set, therefore an AC driven electrical pump was installed to
pressurize the brake accumulator (the same system is used in many
aircraft like the Bae146).
Figure 13: Yellow accu pressure indicator and button
If the Yellow accu pressure is below 1500 psi, establish AC power and
keep the ELEC PUMP push button depressed until the pressure reaches
about 3000 psi. In the actual aircraft this should give you approximately
10 hours of parking brake action. In the panel I have reduced this to
about 1 hour. The yellow accu pressure is passed from one flight to the
next so when you save a flight and come back your aircraft a few days
later the yellow accu pressure will be where it was at the end of the
last session.
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ENGINE START
Once all the pre-start preparations have been finished (load cargo/PAX,
fuel, created a flight plan, programmed the INS, etc…) and you have
received start-up clearance, you can start the engines !
Open the overhead panel (shift-5), the engine start gauge is located
more or less in the middle of the panel
Move the ENG START rotating switch to start system A or B.
Moving the ARM switch to ARM will initiate the start sequence. This
will automatically close the packs valves and the start pushbuttons are
lit for about 3 seconds.
Once the start lights are extinguished they can be pressed. We will
start engine 2 first because this will provide pressure to the yellow
hydraulic system (parking brake again), make sure the cross bleed
rotating switch on the air bleed panel is set to any setting but CLOSED.
Pressing the start button will admit air to the starter by the start valve.
At approximately 20% N2 (main panel), open the fuel supply to the
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