I have about -400fpm descent rate difference disaplyed on the PFD as compared with the actual rate of the aircraft. Was just on a flight and set a descent rate of -1800fpm and the aircraft was descending at about -1775 to -1800 (according to my ACARS program and the A/C itself). The PFD reading on AirTrack was showing -2200fpm.

Update: I was just climbing at a rate of 3000fpm and the PFD in AirTrack showed 3913fpm.

Any ideas on why this could be happening?

Hum, strange. Perhaps the plugin is reading or writing from a different dataref.

Which flight sim are you using? And are you using any special plane?

joao @ airtrack team

I have had same thing when used third-party aircrafts on FSX - don't know about X-Plane, but as I remember there everything's okay.

OK then it must be an FSX plugin issue. I'll check with the FSX plugin developer and try to fix it.

Thanks for spotting it,
joao

And yeah, if you need, the best way to check is to calculate the altitude at the end of the descend by the showing vertical speed and compare it both with plane's and AirTrack's.

Hi there,
I fixed the pluggin for FSX and now we should have a reliable vertical speed.
Give me a couple of days to have the installer ready
Jofre

Thanks for the input. I actually use it with P3D and currently use the Project Airbus 318, 319, 320, 321 series aircraft.

Hi all,

FSX vertical speed accuracy has just been fixed in a new plugin v1.5, now available in the downloads page.

Sorry for the bug,
joao