Hello!

I create an sdf model from a SolidWorks model. The sdf has propellers and control surfaces (ailerons, flaps). When I add the model to the gazebo simulation all this joints starts moving. The propellers are spinning all time and the control surfaces move downwards, they don't remain in the initial position. How can I fix the joints in the initial position and that they do not move until I indicate it with a control plugin?

Thank you for your help.