Has any of you had the terrible bounce when crossing the runway threshold on final approach ?

 

It has happened to several airports when I approach to land and I cannot (each time) reproduce the problem.

 

I approach normally on the glideslope and/or proper path according to PAPI's

Then when I cross the threshold I get a strong kick which rolls heavily the aircraft sideways sending it off the runway, I touch down on the grass next to it by rolling it back straight before touch down, I touch down a bit more heavy and then I decelerate to a safe stop as usual but off runway.

I have crashes disabled and at least this way I don't destroy my flight's ending.

 

Whenever I have tried taking off and making one more visual circuit on the same runway the effect does not reproduce.

 

This has happened to me (from memory) in properly purchased and installed airports of ScanSim Copenhagen (runway 12) and Aerosoft Budapest (runway 13R).

 

There are no visible objects in the approach paths.

 

Any clues ?

 

I have FSX Acceleration with UTX and GEX installed running weather on ASE.

I think it's about disagreement between Airport AFCAD and current airac cycle - different ILS frequencies/hdg. It happens usually with complex aircrafts addons. It happened to me recently on LOWW rwy11 after long time, i'll try to remmember how to solve this (i'm not sure if afcad update is the solution) and i'll post here

I had that into La Guardia one night - I'm pretty sure it was the default airac. I think it was the CLS MD-81, so not that complex. I assumed it was a built in problem, so haven't been back. If it's only intermittent, I should go back... For those who suspect - it's definitely not wake turbulence.

 

If you have a fix Zeljko, it would be much appreciated.

 

Cheers

 

Mike

No, is not about wake turbulence, thermals etc. The plane behaves like autopilot is still on and it's chasing the ils

Ok, editing/creating new AFCAD files for airports seems to be a proper solution. You can search for AFCAD files in AVSIM library, it works great for default airports.

Or you can use this to create your own AFCAD files and replace them in scenery folder: http://www.airportdesigneditor.co.uk/

Folks thanks for the feedback but how on earth can it be related to AIRAC cycle ?

AIRAC cycles are about waypoints for navigation, airways which join them etc.

 

Here I'm talking about flying the aircraft on the last portion of the approach in FSX and getting a kick when at ~200ft above ground.

It has got nothing to do with autopilot flying or ILS.

 

I am now trying to recall details.

 

All the subject flights were flown on line in VATSIM with FSInn as pilot client of FSX.

Weather was by Active Sky Evolution (ASE).

Most but not all these flights had other (FSInn) multiplay (converted to FSX AI) live traffic waiting for me in the runway holding point.

Another couple of incidents had traffic taking off before me on same runway or taxying next to the runway on parallel taxiway.

 

I am starting to suspect it has got something to do with FSInn giving wrong data to AI traffic movements and/or/then ASE giving me exagerated wake turbulence phenomenae based on AI ttraffic injected by FSInn.

 

I'll look in to it....

You should have the AP off at minimums at least unless you are in CAT3 conditions. Not every runway and airplane supports CAT3 landing either. It sounds to me like you aren't using proper procedures. Looking at LHBP charts, 13R is a CATII runway only.

Listen to what the OP is saying. It happens when the AP is "OFF" ( as it should be by the time your reach the threshold, -- unless you have a CAT_3 Autoland system -- which is NOT the same as a simple ILS system )

 

I have seen this before, and it is some interaction between Weather and the airport.

 

Problem is, it was so long ago, I cannot remember exactly what it was, and how to fix it.

 

I would suggest you find an airport where this happens, and the set the weather to CLEAR. -- Does it still happen ?

Maybe it was having THERMALS turned on ?

 

In any case, if you can find a repeatable situation of AIRCRAFT, AIRPORT and FIXED Weather Theme, where this happens, then maybe it will become clearer what is causing it.

 

Lastly, do you have any Scenery addons , that would affect the Airport where this is happening ?

 

YES - I have seen this as well, and it was flying

• the stock MS Cessna C172,
  
• without the autopilot
  
• into KMTN (my RL local airport)
  
• in Single player,
  
• with all AI aircraft OFF.
  
• weather ??? (probably Real weather)
  
• weather addons ??? (probably none)
  
• addon scenery ?? (probably stock FSX )
  

It was like a massive "wind shear" at the threshold --- a COOL thing if one was able to set and control it, but somewhat upsetting, when it is random, and unwanted .

Could there be a misalignment of the add-on airport scenery - one which would only show when you transferred from the standard FSX to whatever scenery package? Have you tried temporarily removing the add-on and using the default? Just a thought.

 

John

Folks thanks for the feedback but how on earth can it be related to AIRAC cycle ?

AIRAC cycles are about waypoints for navigation, airways which join them etc.

 

Here I'm talking about flying the aircraft on the last portion of the approach in FSX and getting a kick when at ~200ft above ground.

It has got nothing to do with autopilot flying or ILS.

 

I am now trying to recall details.

 

All the subject flights were flown on line in VATSIM with FSInn as pilot client of FSX.

Weather was by Active Sky Evolution (ASE).

Most but not all these flights had other (FSInn) multiplay (converted to FSX AI) live traffic waiting for me in the runway holding point.

Another couple of incidents had traffic taking off before me on same runway or taxying next to the runway on parallel taxiway.

 

I am starting to suspect it has got something to do with FSInn giving wrong data to AI traffic movements and/or/then ASE giving me exagerated wake turbulence phenomenae based on AI ttraffic injected by FSInn.

 

I'll look in to it....

 

Which aircraft you fly and do you have UTX or GEX?

It happened to me only with PMDG MD11 long time ago. And it was scenery issue, i think wrong elevation related.

Sorry for the previous post, I thought you are talking about something else - it's about problem on final when plane just roll to the left or right like possessed(with APP off) and you miss the rwy, that was airac related.

Broken mesh data can cause the symptoms you are describing. I have also had those issues at La Guardia, as one of the poster mentioned earlier, and I fixed it by reducing the mesh resolution in my setup. I believe I had to turn it down to 19m, but your mileage might vary. It is of course possible that you can fix it by increasing the mesh resolution as well

Has any of you had the terrible bounce when crossing the runway threshold on final approach ?

 

It has happened to several airports when I approach to land and I cannot (each time) reproduce the problem.

 

I approach normally on the glideslope and/or proper path according to PAPI's

Then when I cross the threshold I get a strong kick which rolls heavily the aircraft sideways sending it off the runway, I touch down on the grass next to it by rolling it back straight before touch down, I touch down a bit more heavy and then I decelerate to a safe stop as usual but off runway.

I have crashes disabled and at least this way I don't destroy my flight's ending.

 

Whenever I have tried taking off and making one more visual circuit on the same runway the effect does not reproduce.

 

This has happened to me (from memory) in properly purchased and installed airports of ScanSim Copenhagen (runway 12) and Aerosoft Budapest (runway 13R).

 

There are no visible objects in the approach paths.

 

Any clues ?

 

I have FSX Acceleration with UTX and GEX installed running weather on ASE.

 

You didn't specify what aircraft you're flying? Is it every aircraft?

It does not happen on any specific aircraft. It has happened both with PMDG 737NGX and Leonardo MadDog (MD82).

 

I have both UTX Europe and GEX installed.

I had this with previous fsx installation, the only thing i can remember right now is that you should check for last patches for UTX and GEX. I know that UTX fixed a lot of elevation problems with last update http://www.sceneryso...om/ut_news.html

 

I'm not sure if mesh resolution can fix this. My mesh resolution was much lover when i had this problem. Now i have new system, everything is maxed out and i never had this problem(on new PC). I'll post here if i find something more about this

I had this with previous fsx installation, the only thing i can remember right now is that you should check for last patches for UTX and GEX. I know that UTX fixed a lot of elevation problems with last update http://www.sceneryso...om/ut_news.html

 

We're getting somewhere ... thanks B247NG

UTX EUR I had it up to date (v1.5) but GEX EUR had major update since I had purchased it.

Already my FSX performance improved from the update. I will see soon in next flights if the problem disappeared.