Parking query.

[garysted]

Gents,

Not a major issue but just curious as to any thoughts. In FS9 what would cause a AI aircraft to taxi and park on top of another one of similar type besides multiple AFCADS? That's the usual answer I hear to that happening but at Leuchars I have a 111 Sqn F3 taxiing and parking directly on top of another. There is definitely no other AFCAD present and there is only one parking spot in front of the HAS as normal. Both aircraft and parking spot are assigned '111' and there are other empty parking spots present (of the same size, although not coded). I don't know if it's a factor but it's always the same aircraft returning from the same sortie and going to the same already occupied parking location. Weird.

Gary

[campbeme]

Well to me it sounds like you have a parking spot placed on top of another parking spot. This will cause stacked parking.

May be worth a check.

Mark

[Firebird]

Gary,
I have had in the past that if you are following a plane using TVB that sometimes this will happen. Is that what you were using?

[mikewmac]

Gents,

Not a major issue but just curious as to any thoughts. In FS9 what would cause a AI aircraft to taxi and park on top of another one of similar type besides multiple AFCADS? That's the usual answer I hear to that happening but at Leuchars I have a 111 Sqn F3 taxiing and parking directly on top of another. There is definitely no other AFCAD present and there is only one parking spot in front of the HAS as normal. Both aircraft and parking spot are assigned '111' and there are other empty parking spots present (of the same size, although not coded). I don't know if it's a factor but it's always the same aircraft returning from the same sortie and going to the same already occupied parking location. Weird.

Gary

Gary,

How are you observing the returning AI aircraft? If you happen to be using Traffic View Board to follow one, it may park on top of another.

Oops! Steve beat me to it.

Mike

[garysted]

Gents,

Thanks for your thoughts. I can eliminate the duplication of parking spots though, as I checked for that thinking that might be the reason. I am using a traffic viewer sometimes, although it's the one packaged in the Just Flight AI Traffic add-on which I don't think is the same one as most people use. I don't know if that makes any difference. But, it also happens when not being viewed as well, earlier this evening I was flying in the vicinity when a pair of AI F-3's landed, including the one that usually landed wrong, and I didn't directly view them until they'd shut down, and found the usual culprit had double parked in the same location that he always does! Strangely it's the last HAS on the taxiway loop?! As I say, it's not a big deal, but I'm always curious to try find out all the little nuances of AI behaviour. I don't know if it's a factor but I'm using a third party Leuchars add-on (scotflight), with a AFCAD modified by me and my own flightplans and modified textures on the FMAI F-3. Any further thoughts most certainly welcome.

Gary

[bismarck]

I've had the same problem many times. All already said by other user is right, but almost ever, you have the problem because the aircraft exit from runway an do not pass trough a Hold Short Point. This means that FS ATC doesn't clear the aircraft to a free parking spot and it goes to the first Parking spot. Generally it is the first spot created in Afcad.

Giorgio

[kungfuman]

As suggested above, make sure every runway exit has a hold-short node, not just the ones at the ends of the runway.

hth

[garysted]

Hi,

It was the hold short node. One taxiway exit that the F3's were using did not have a red node on. I added it, watched at the same time and they taxied to empty spots. Thanks.

Gary

[DeepSea-Two-One]

One part of the parking process which is not described in detail often is that multiple just landed aircraft can be assigned to the same parking spot.

The parking spot assignment is done on the runway when the aircraft slows to about 30-35 kts and transitions a flight stage called rollout. At that point the aircraft is assigned the first open parking spot. But that assignment does not consider that another just landed aircraft might have been assigned the same spot.

When the AI aircraft gets off the runway and stops at a hold-short node - the parking spot assignment is confirmed, and only at that point does the AI parking system consider that aircraft have been assigned to a parking spot, but are not yet physically in the spot.

Usually we see this at airports with multiple parallel runways and a major airline is dominant - KDFW, KATL, KDEN are some place I've seen it happen. Takes the right kind of traffic with two same size aircraft with the same parking codes landing at different runways at near the same time.

We went through a period of time early in the AFCAD2 Beta and early in FS2004 where people thought that not having hold short nodes would help AI aircraft exit the runway faster. Some of that reasoning is still around because at many airports which do not have similar aircraft landing at the same time it seems to work well. But in almost all cases, all runway exits need hold short nodes for AI parking to work correctly.