Jump to content
Sign in to follow this  

PMDG 747-8 Glitch...?

Recommended Posts


I need help with a glitch that's really bothering me while flying the 747-8 variant... I have googled around but cannot find any thread regarding the issue...

When I try and rotate and just when I touch down during landing my nose gear glitches and just goes straight down on the ground... no movement.. just like in in 1 microsecond it goes from 10 degrees pitch to 0 degrees... no transition, just glitches back to the ground. 

It has done this for the last 5 landings now and I do not know how to fix it... I have updated to the latest version..


Any ideas or if you can link to a thread dealing with this?

Best regards.

Edited by Araxxos

Share this post

Link to post

This can be caused by an invisible terrain anomaly where there is undulation or spiking of the terrain mesh...the sim sees it as a "crash" into the ground.  If that's what's causing it, often a too-high terrain mesh resolution is behind it...you can try decreasing the mesh resolution a step or two. 

For example if your scenery was designed with 5m mesh and you select 2m resolution, the sim will attempt to interpolate the mesh data and sometimes that interpolation process introduces small bumps in the mesh surface that aren't present at the target resolution.



Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

System1 (P3Dv5/v4): i9-13900KS @ 6.0GHz, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@30Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU, 1.2Gbps internet
Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro
PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys2 (MSFS/XPlane): i9-10900K @ 5.1GHz, 32GB 3600/15, nVidia RTX4090FE, Alienware AW3821DW 38" 21:9 GSync, EVGA 1000P2
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, 2x TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Portable Sys3 (P3Dv4/FSX/DCS): i9-9900K @ 5.0 Ghz, Noctua NH-D15, 32GB 3200/16, EVGA RTX3090, Dell S2417DG 24" GSync
Corsair RM850x PSU, TM TCA Officer Pack, Saitek combat pedals, TM Warthog HOTAS, Coolermaster HAF XB case

Share this post

Link to post

In addition to what Bob Scott has said, if you have ORBX GLOBAL VECTOR installed as well as other addon scenery files, then don't forget to run VECTOR's Auto-Configuration tool to scan your scenery.cfg file for conflicting airport elevations.  According to ORBX, this should be done whenever you install, uninstall, activate or deactivate any addon scenery.

Share this post

Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
  • Tom Allensworth,
    Founder of AVSIM Online

  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Create New...