Autoland is only with ils CAT 3b and 3c, right?

By the way CAT IIIc is purely theoretical at this point - no passenger airlines

anywhere in the world are utilizing CAT IIIc operations.

Thanks, but for the ILS CAT I or CAT II, there is no vertical guidance from the DH/DA to the runway. Does it mean that the Loclizer is on the DA/DH level?

 

Thanks

No.

 

You really do try to understand how ILS works.

 

 

Thanks, but for the ILS CAT I or CAT II, there is no vertical guidance from the DH/DA to the runway.

 

Wrong - no matter which way you look at it!

 

And, . . . . . . . there is only one kind of ILS in FS9. That one has a glide slope or not and a DME or not. DA/DH is totally unrelated to ILS. DH - is a altitude alert preset by the pilot to remind that if the aircraft is not properly configured to land or properly aligned with the runway or is below proper approach altitude it is time to go around. This also depends on airport altitude, the terrain around the airport, obstacles in the area and the type of aircraft.

 

The Localizer is the horizontal component of the ILS. When intercepted correctly with the proper autopilot function(s) switched on will control the heading of the aircraft directing it to align with the landing end of the runway. The glide slope is the vertical component and again with the proper autopilot function(s) switched on will switch off the autopilot altitude hold and set the aircraft on a descent toward the touchdown point on the runway. It is up to the pilot to have the plane configured for landing before the descent begins. If left alone the plane will fly all the way to the runway and either crash from the impact or bounce and then crash from the impact. It is up to the pilot to retake control of the aircraft, retard the throttle(s) when appropriate and flare the plane for touchdown. If the ILS does not have a glide slope it is up to the pilot to hand manage the descent phase.

 

Please read through 'The Learning Center' found in FS9 main user interface page. BTW you have never stated exactly what kind of aircraft you are trying to land.

We were all new to flight at one time. Some of us took formal theoretical training as a part of a license or rating. Other's didn't have the time, health, funding or wish to do that and have learnt over time how things work, such as an ILS or other approach. In fact, some of the people here that are self-taught know more than many pilots that I know...

 

But whatever the track to knowledge, flying is very technical and demanding, even in the sim. There are many references on the web that could help you as far as how approaches work and how an aircraft/pilot flies them.

 

Welcome to avsim- I see you have 12 posts, a half of which are in this thread. I will be happy to help you once you have constructive questions.

 

Bruce

Thanks a lot, I have more or less got the concept of ILS.

But does the plane has to send also it's signal and then only the LOC will send his frequ or does the LOC keep sending it's frequency? If yes, which frequency does the plane send to the LOC or even other VOR, NDB during the flight?

 

And when we click on the LOC button, what does really happen? does the plane send his signal tothe beacon and then the LOC sends the signal to the glideslope?

 

Thanks

Localizer & Glide slope are both separate arrays located in different locations & constantly broadcasting.

 

 Localizer (lateral guidance) will be after the departure end of the runway.  Glide slope (vertical guidance) is of to the side of the runway.  Both of these combine to give you the ILS.  Frequency is from 108.10 to 111.95mhz

 

The A320 will auto tune the correct frequency or you can tune it yourself manually.  Once tuned and in range, the LOC button will lock on to the localizer, the APPR button will lock on to both for full guidance.  

Thanks,

1) So the LOC keeps giving it's frequency, right?

2) Do we have to press the LOC button? We can simply tune it and the plane can simply receive it's signal!

3) So when we press APPR, the localizer will send it's frequency but also the glide slopes frequency?

 

Thanks to explain...

Thanks,

1) So the LOC keeps giving it's frequency, right?

2) Do we have to press the LOC button? We can simply tune it and the plane can simply receive it's signal!

3) So when we press APPR, the localizer will send it's frequency but also the glide slopes frequency?

 

Thanks to explain...

 

Is this part of a school project or are you just curious? It really does seems like you are trying to run before you can walk.

 

1.Yes

2.You press LOC to arm capture of the localizer. The pilot must always initiate the action.  It can be tuned and displayed without pressing LOC or APPR for when handflying

3.LOC & G/S is always sending out it's frequency. Pushing APPR will just arm a capture for both LOC & G/S

Thanks,

So we enter the frequency in the FMS for our flight plan and to receive the right LOC signal, right? When you are landing at big airports, anif you don't tune the ILS, it can take any of them, right?

The ILS freq is stored in the FMGS database, once you select your arrival runway it will auto tune for you.  You must also have up to date charts that display the correct frequency's for runway's in use as a backup.

 

Now, let's say you are landing at Heathrow on 27R.  Before you are anywhere near the runway you will conduct an approach brief.  Part of this brief is to confirm exactly what runway you will use and the frequency is checked and confirmed along with the expected identifier.   The identifier can also give you a morse code signal as a backup.

 

Once you are nearing the runway you will see the localizer, glide slope frequency & identifier picked up on your PFD.  Once again you confirm the frequency and the identifier 109.50 I-LL

 

If for some reason you had to switch to runway 27R you could manually tune 110.30 and confirm I-RR is displayed, or punch in the new runway into the MCDU

 

Each runway has it's own frequency and identifier (For obvious reasons)

Thanks but there is still something that I am not able to understand.

When you fly, you keepreceiving signals from the VOR, NDB...

But when you enter the frequency in the FMS, and the courqe, why do you have to press the LOC button????

What really happens when you press the button?

Thanks but there is still something that I am not able to understand.

When you fly, you keepreceiving signals from the VOR, NDB...

But when you enter the frequency in the FMS, and the courqe, why do you have to press the LOC button????

What really happens when you press the button?

 

You must press LOC or APPR to confirm that you want the aircraft to track the signal.  Think about what would happen if the aircraft locked on automaticaly with no pilot input.  You could inadvertently lock onto the wrong localizer or glide slope, lock on when you do not want to follow the G/S or LOC

 

That would not be good thing on A/P or hand flying a large hulk of aluminum travelling at 140+ knots 

Thanks a lot, you are very helpful.

But what happens if you don't press LOC? Will it align with the runway or will it keep our last HDG? Of course everything is entered in the FMS

lol, c'mon mate, this is getting silly I already explained that you must push LOC to track the signal.  If you don't push it nothing happens, you remain in the last active mode selected and displayed on you FMA.  

 

When you push LOC you will see LOC* (LOC STAR) displayed on your FMA. This confirms the aircraft has received your request and will attempt to intercept. Once it has locked the *(STAR) will disappear from the FMA and you are now tracking the localizer.