public void accelerate(float force) {
        for (int i = 0; i < wheels.size(); i++) {
            vehicle.applyEngineForce(force, i);
        }
    }
Apply the given engine force to all wheels, works continuously
@param force the force
jme3-jbullet/src/main/java/com/jme3/bullet/objects/PhysicsVehicle.java