Efforts to get a car running (meca3d)

Hello, I'm in my final year of high school and I have a project for a solar car. I take care of the mecha part, and I try to find out how much effort it takes for the car to move forward. However, meca3d (v.15) tells me that there is a lack of effort associated with an imposed entry movement. Can you help me please?

The fixed constant is the weight I have set at the chassis gravity point. The chassis is already an assembly with pivotal connections between the members and the chassis structure.


meca3d.jpg

Hello

koef friction wheels /ground, resistive torque (system efficiency), ect...?

Or, the force corresponding to the ground opposing the weight of the chassis (fix your track).

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