Don't you remember in the other scene I made, that the scircles keep spinning my themselves with no external force?
I tested making another design and it still does this. At first we though it was a misplace hinge, but it has to be something with the grid beacuse everything is perfectly symmetrical from my view...
I put the sim.frequency to 1200 Hz and it slowed down to a stop, but then I turned off air friction and gravity and it keeps spinning at about 4 Rad/s.
I get your point though...
It does not say any errors when I press F10, but whenever I download the game, in the green part to the right it says, from order top to bottom: Jardinains!, Score: error, Lives: 1, Time: error
He's not using a motor, he just uses a script so that the angle of the wheel to the right is the same as the paddle wheels, so as it moves, the speed is transferred, but the right wheel has infinite energy.
You could put two identical thrusters to the left and right sides, pointing outwards, being PREFECTLY symmetrical. Un-Check the ox that says follows geometry rotation and play around with the power of the thrusters.
I was using it for a while and it maxed out on me at 700 KM/H. There's now way a Lamborghini can do that, or a wheelie in 7th speed LOL. The car is awesome.