If you're just looking to change the physics and are OK with keeping the same visual model, the simplest thing would be to edit the parameters of the included uasset file for the SUV (in AirSim Content/VehicleAdv/SUV/)

If you have a completely custom mesh, then you can set it up like any other wheeled vehicle, but instead parent it to CarPawn. And then change the CarPawn constructor to point to the correct assets.

Thanks! Yup, just looking to change the physics, don't care about the appearance of the geo for now. Have you got anything there that would affect the throttle command? (Is there a drivetrain model?)

For throttle, there are a few things you can try.

First, open the blueprint SuvCarPawn, and navigate to the VehicleMovement component:

There are a few relevant parameters you can play with:

• Max RPM: this controls the top speed of the car.
• Torque Curve: this controls the acceleration. To up it, add a few more points and slide it up.

There are drivetrain / transmission models, but those usually affect handling (i.e. turning) more than acceleration.

Do keep in mind that there will need to be some manual tuning; I have found that copy-pasting actual data from real-world tests done on car components (e.g. torque curves from engines) usually doesn't give very good results.

Awesome, I'll play with this!

Would you please provide a more detailed tutorial on how add a custom mesh vehicle to AirSim? Thank you!

Hi, I would also be happy to have more infos on how to use a custom mesh car/vehicle. Thank you

@chioveri

May be this works for you, I will try it out as soon as I find the time:
https://github.com/Microsoft/AirSim/blob/master/docs/settings.md
The documentation deals with all sorts of parameters that can be
set in the "/Documents/Airsim/settings.json file". Have a look at the
"pawn paths" section.

Hi guys,

I´m also having difficulties to change the mesh of the car. Just the mesh. Anyone knows how to do it? I tried different approaches like changing SpawnCar Path to a new blueprint and also trying to change only the Skeletal Mesh to a new Mesh.

If someone has already done this, could you exemplify how to do it?

Best regards,
Fernando Damasio

@fernandodamasio
I did not look into your code problem.
But here is a skeleton settings.json for the custom model I use:
"SettingsVersion": 1.2, "SimMode": "Car", "PawnPaths": { "DefaultCar": {"PawnBP":"Class'/Game/TruckTrailer/Truck/Blueprints/Truck.Truck_C'"} }
You have to adjust the path in "DefaultCar" to your setup.
Please refer to the documentation for details. Look under "Other Settings" paragraph "PawnPaths".

@fernandodamasio
I did not look into your code problem.
But here is a skeleton settings.json for the custom model I use:
"SettingsVersion": 1.2, "SimMode": "Car", "PawnPaths": { "DefaultCar": {"PawnBP":"Class'/Game/TruckTrailer/Truck/Blueprints/Truck.Truck_C'"} }
You have to adjust the path in "DefaultCar" to your setup.
Please refer to the documentation for details. Look under "Other Settings" paragraph "PawnPaths".

Hi @benjamin-lange

I tried to change only the mesh inside the cars' blueprint. It didn´t work. So, I guess I need another car to change it? I mean, I can't change just the mesh / appearance of the Airsim car.

Appreciate your help.

Best regards,
Fernando Damasio

@fernandodamasio , your are welcome.

I tried to change only the mesh inside the cars' blueprint. It didn´t work.

I recommend leaving the default blueprint alone.
Just to clarify what you tried to do, you tried to change the mesh as it is shown in the following screenshot?

If so then you might break the animations associated with the mesh which could cause more problems.
That is if you want to use the default vehicle in the future you have to fix these problems.

So, I guess I need another car to change it?

Yes, I recommend that. At least copy the original Blueprint located in project_name\Plugins\AirSim\Content\VehicleAdv\SUV and rename it before you experiment on it. ;-)
After you made your changes try out the pawn path method as stated above.

For your experiments with custom vehicle Blueprints in Airsim have a look into this free asset from the marktplace or simply use the car model from the Blueprint vehicle template. To get the vehicle template create a new project using the Blueprint vehicle template and then extract the Blueprint from it. Then use the pawn paths in the settings to setup the vehicle Blueprint for Airsim. I think there is a way to import the vehicle template content into your current project without creating a new project as well, but I do not know the details for this procedure.

Hi @benjamin-lange

Thank you very much for your quick response and also congrats for the Airsim project!

Regards,

@karanparikh91, have you tried using the "WASD" keys to move the vehicle?

@benjamin-lange thanks for your reply.

Turns out the car was not exported properly from Blender.
My colleague found this blog post useful in fixing the problem
blog post: https://forums.unrealengine.com/development-discussion/content-creation/66676-help-blender-vehicle-to-ue4

I've got things working correctly now.

Hi @benjamin-lange

I have my own own project and my own vehicle model with the following skeleton [see image]. I have created a child blueprint class from AIRSIM carpawn and selected a mesh of my own vehicle. What else I should do in addition to that to use my vehicle ?

If I try to play. Iam getting the following error. [image]

My json settings are follows.

{
"SettingsVersion": 1.2,
"SimMode": "Car",
"PawnPaths": {
"DefaultCar": { "PawnBP": "Class'/Game/Mower/Blueprints/Mower_AIRSIM.Mower_AIRSIM'" }
}
}