For this exercise we will move to Croatia, with
a beautiful summer panorama. Set up an IFR flight with Rijeka (LDRI
River) as the departure airport and Pula (LDPL) as the arrival
airport. Fly with a Cessna C172 at a daytime, good weather, summer
season, no wind.
Pola has only one track with ILS, the 27 with the following
features:
Altitude 274 feet effective heading 266 ILS frequency 111.50 MHz Range 27 NM Descent angle 3.2 ° DME absent To get the data of the airport you can proceed in two ways.
Fig. 2
To get the data of the airport you can proceed in two
ways.
1) Through FSX when you are in one of the three
flight windows you need to recall the menu item
World-> Map
Maximize the area where the airport of interest is
located and click on the airport itself (highlighted by a green
rectangle). You get an image like the one shown in Fig.2. The mouse
must be in Windows mode and not in control mode.
2) Through Little NavMap, select the airport in the "Flight
Map" window (top left), thus obtaining all the characteristic data
in the "Information" window
immediately below, with much more detail than those
given by FSX.
You were told by the controllers to takeoff is from runway
32 and hold 6,000 feet, so set this value on the panel and VS at
700 feet/min.
You can also set NAV1 to 111.5 and activate it from this
moment on as an active frequency. Bring the heading bug to 320, a
notch flaps and take off. At 2000 feet change the mouse mode and
activate HDG and ALT.
Remember that with the mouse in Windows mode (white arrow)
you can no longer act on the engine speed with the central wheel,
but you must use the F2 and F3 keys. Here are only the conversations with the control that are
significant for our example.
TOWER Cessna AFM contact Rijeka Departure on 119.0
To contact the tower, you need to change the COM1
frequency; you can do that from the ATC window with the mouse or
with the 1 key on the keyboard, but it is more elegant to use the
mouse on the COM1 stand-by frequency and then make the exchange, as
it would happen if you were really in flight,.
PILOT Key 1 or click with the mouse on item 1 directly in the ATC
window ..
TOWER Cessna AFM, - - -, Turn left heading 195, climb and
maintain 6000. Expect vectors ILS runway 27 approach.
PILOT Key1 (Acknowledge)
Bring the heading bug to 195 using the knob on the bottom
right: you must make a left turn, then turn it to the left,
otherwise you will find yourself in the correct direction, but
after having made a long turn.
After a while:
TOWER Cessna AFM, turn right heading 230
PILOT Tasto 1
Turn the knob to the right until the heading bug is 230.
Remember to always give the acknowledgment first and then
execute the command.
If the speed drops below 80 knots, decrease the rate of
ascent to 500 feet / min.
TOWER Cessna AFM, Descend and maintain 2800
PILOT Tasto1 (Acknowledge)
Bring the altitude up to 2800 and reduce power to level
correctly.
Approaching Pula at a certain point, the ILS signal hooks
up. You can realize it because in the VOR1 indicator the flag
changes from white-red to white-black and the horizontal and
vertical reference lines are no longer at rest or at the end
position (Fig.3).
Cessna AFM, contact Pula Approach on 118.4
Tasto 1 (Acknowledge)
Change COM1 and make the call through the menu item.
Cessna AFM, turn left heading 175, Climb and maintain 2800
Tasto 1 (Acknowledge)
Rotate the knob to bring the bug to 175 turning left.
After a while:
Cessna AFM, you are 15 miles east. Turn right heading 235.
Descend and maintain 2800. Cleared ILS runway 27 approach. Maintain
2800 until estabilished on the localizer. Contact tower on 120.0
Tasto 1 (Acknowledge)
Turn right to 235 and when the answer-back transmission is
over change the communication frequency and contact Pula.
Cessna AFM, Pula Tower. Fly straight in, runway 27,
altimeter 2992.
Tasto 1 (Acknowledge)
You were making a turn to 235, but since you were told to
fly straight in and are already established on the localizer you
can switch off HDG and on APR in the AP.
Pay attention now to the reference lines of the VOR1
indicator; they must both be in a central position and most likely
the horizontal reference aligns first (which on the instrument is
the vertical line pivoted upwards) and only after the vertical one
(the horizontal line hinged to the left). The approach to the ideal
path is always from the bottom; to understand why, refer to Fig.4.
The blue plane, approaching below the ideal path, can better manage
the speed, maintain a constant AGL altitude and intercept the GS
with a leveled attitude; the red plane, on the other hand, has a
pronounced angle of descent, a nose down attitude and almost
certainly a higher speed that must be managed and reduced at the
last moment.
The arrival from above, called "slam-dunk approach",
therefore is more problematic, even if in reality some controllers
propose it, because in very busy airports it frees space at low
altitudes for aircraft in take-off phase. It is probably faster
than the standard approach and does not involve greater fuel
consumption, but a steeper descent is required and a marked pull-up
at the last moment. However, the pilot has the right to accept this
request or not.
The figure is obviously not to scale, but, as can be seen,
to correctly intercept the 3° angled descent path with respect to
the runway, it is necessary to have a level of 1400 feet AGL at 5
NM from the runway limit.
The Pula airport is practically at sea level (274 feet) and
we are asked to maintain 2800, but we are beyond 10 NM, so the
level required allows us to arrive from below and since we are
still low compared to the path of descent, we must maintain 2800
feet, as ordered.
At a certain moment the vertical reference aligns. You
should be at the start of the final. The indicator on the ALT
button should turn off by itself, if not turn it off, otherwise you
will never go down. Leave the AP on still for a while, then move
the mouse to a suitable position to be able to continue with manual
flying, change the mouse functionality and press ‘Z’ to switch off
the autopilot. A beep will warns you of the successful operation.
Cessna AFM, cleared to land runway 27
Tasto 1 (Acknowledge)
Check speed and horizontal and vertical alignment, also
with the help of PAPI lights, and perform a manual landing.
Parking areas in Pula are on the right side of the runway
if you want to reach them.
Congratulations, your first ILS approach is over.
Easy, right? Even too much. Apart from the two take-off and
landing procedures, there has been little or nothing to do, but
than look at the monitor and wait in the headphones for
instructions from the traffic controllers.
We will see in subsequent exercises that the operations are
roughly always the same, but each aircraft has its own
characteristics and the layout of the controls is absolutely unique
for each model.
If instead of flying with the Cessna, you had chosen other
planes the visualization of the references for VOR1 could have been
different. We see two examples in Fig.5.
On the left we find the classic HIS:
The reference alignment is on the central plane of the HSI,
so in the case shown you would find yourself vertically just below
the descent slope and horizontally slightly to the right.
Fig. 5 right shows a slightly different version of the one
on the C172. Instead of having two fan-like hinged lines, there are
two lines, one vertical and one horizontal, which move parallel to
the axes. The alignment occurs when these two lines intersect in
the center of the indicator. This type is not found on aircraft of
Microsoft library; the one displayed is on the third-party Cessna
414 downloaded via the Internet.
The two images if Fig. 5 represent the same situation
(Cessna 414 has both); to be noted also the white small triangle
that indicates the direction of the incoming radio signal.