+1 vote
asked by (13 points)


I am trying to use the VEHX-UDP command in X-Plane 11.30 to move other aircraft. The Log-File says, that X-Plane received a message and the calculated data is correct, but the aircraft is not moving. I use the ACFN and PREL message before sending the VEHX-Messages to initialize a new Aircraft and they are working fine. I can also abuse the PREL Message to move the Aircraft, but this message is missing the roll and pitch information. If i modify the Message to VEH1 (the padding of the identifer-Int ist different) i can move Aircraft in X-Plane 10 without problems.

I don't know, why the VEHX Message is not working. It's clearly in the Log-File below, that X-Plane receives a good message and the "USING" Parameters are all correct. So Why is it not moving the Plane? Do i miss some setting in the menu?, is there anything else that is preventing the VEHX from working? I'm pretty sure, that this is a bug. I don't know, if it had worked before 11.30.

Thanks for your help,


XP11 Log-File (Runway 18 on EDDF):

      OK we got the VEHX message:

INCOMING: lat=    50.03 deg

INCOMING: lon=     8.53 deg

INCOMING: ele=        1 meters

INCOMING: psi=   179.22 deg true in local horizon\n INCOMING: the=     1.30 deg from local horizon

INCOMING: phi=     0.08 deg from local horizon

USING   : x=  -33898.53 m from ORIGIN

USING   : y=    -299.13 m from ORIGIN

USING   : z=   51775.36 m from ORIGIN

USING   : psi=   179.59 deg true from ORIGIN

USING   : the=     0.83 deg from ORIGIN

USING   : phi=     0.39 deg from ORIGIN

commented by (16 points)
Hallo Martin,
I cannot answer your question. I suppose, I am trying to do something similar. I ended up using the DREF struct to control the x,y,z DataRefs of particular airplane and move it around.  Because I couldn’t find formula for conversion lon, lat, el to x, y, z.

To use this method you have to first set the:



datarefs to 1 for your particular plane.

Please log in or register to answer this question.

Welcome to X-Plane Q&A, where you can ask support questions and get answers from members of the community.

This site is for X-Plane support questions only. Please search for existing answers before posting your question. Off-topic questions will be locked.

If you’re new, you’ll need to register before asking your first question.

If your question is answered, click on the check mark to select the best response.