Just saw this happen now. Every takeoff on 26R is not rotating and overrunning the runway, not lifting off.

https://drive.google.com/file/d/1ECiqqfUFY7dpnbEq_DNWG9nmPpZpaP-S/view?usp=drivesdk

I am now seeing this happen at San Diego.

Edited July 30Jul 30 by simsuper80
Typo

Some Aircraft are not taking off at Seattle. They either get stuck at the start of the runway or they disappear.

Edited July 31Jul 31 by simsuper80

This topic has been discussed before. These things are because sometimes the data coming from RT is not correct.

PSXT cannot do anything about that. It is garbage in, garbage out...

Just ignore these anomalies or go to a better served airport. Luckily they are a lot.

EDIT: There is also a small chance it is cause by a very wrong QNH. You can check that your self.

Edited July 31Jul 31 by kiek

On 7/31/2026 at 8:25 AM, kiek said:

This topic has been discussed before. These things are because sometimes the data coming from RT is not correct.

PSXT cannot do anything about that. It is garbage in, garbage out...

Just ignore these anomalies or go to a better served airport. Luckily they are a lot.

EDIT: There is also a small chance it is cause by a very wrong QNH. You can check that your self.

In my opinion, this is not a QNH problem. I also experience this at EHAM and LHBP airports, where the PSXT has been working very well so far. The ground movements are excellent, there are no hiccups, but the planes do not take off from the ground and the arriving planes are not visible in the air, they only appear when they are at the end of the runway or have started taxiing. Overall, the traffic in the air is not visible, only the ground traffic.

1 hour ago, vonSzuli said:

In my opinion, this is not a QNH problem. I also experience this at EHAM and LHBP airports, where the PSXT has been working very well so far. The ground movements are excellent, there are no hiccups, but the planes do not take off from the ground and the arriving planes are not visible in the air, they only appear when they are at the end of the runway or have started taxiing. Overall, the traffic in the air is not visible, only the ground traffic.

Strange, EHAM is my home airport. I'm there almost every day for many hours and everything is normal....

Do you have a low Max Live set? If for instance lower then 25 then PSXT will continuously remove the live aircraft that is furthest away from the user aircraft. Then you will probably not see aircraft in the air all, because there are already 25 live aircraft parked at gates or taxxing...

Edited Wednesday at 12:07 PM2 days by kiek

21 hours ago, kiek said:

Strange, EHAM is my home airport. I'm there almost every day for many hours and everything is normal....

Do you have a low Max Live set? If for instance lower then 25 then PSXT will continuously remove the live aircraft that is furthest away from the user aircraft. Then you will probably not see aircraft in the air all, because there are already 25 live aircraft parked at gates or taxxing...

It was fixed by the evening. I haven't changed the settings in a long time, so there was definitely no problem with them. It was strange because I had never experienced anything like this before.

I saw the same issue yesterday at KDCA - aircraft departing on RWY 19 were rolling to the very end or slightly past the departure end of the RWY before rotating and climbing. Interestingly all arriving aircraft to RWY 19 were touching down almost exactly on the 1000 ft. marks.

1 hour ago, somiller said:

I saw the same issue yesterday at KDCA - aircraft departing on RWY 19 were rolling to the very end or slightly past the departure end of the RWY before rotating and climbing.

Well that's okay, that is not what the OP meant I believe. He wrote that the aircraft did not take off.