Static planes/helicopters on ground

Following this forum , i was able to make static heli on ground without pilots.
One small issue : after the start of the game, it falls under the ground after 20 seconds.

Does anyone knows how to fix it ?

I feel that your example does not have the disableFallUndergroundAtDestroyed enabled, but I have created a simple mission to understand it more clearly. You can take a look at my trigger and try :)

I didn’t find this parameter in the trigger unitSetProperties

Oh my bad, it is in Visual params.

Now i have a new issue, it disappears

Even if they say it is a new problem, it is impossible to understand it on our side.
Can you upload a blk file for the mission?

I think his problem come from Fuel = 0