I want to make a simple RC car i scale 1:10 With functional steering and Power transmission. No detailed engine. I havent started yet.
This is much too late of course, but if someone else bumps into this it might be helpful to him/her.
The guy who runs this site, Ryo Inagaki : http://theoptimahouse.blogspot.nl/
does 3D models of real RC cars in SketchUp.
Right now a rendering of one of them is featured in the front page slider at the SketchUp website. (3rd image)
Here it is (but it's much larger in the slider) : http://s14.postimg.org/6l15qo4y9/theoptimahouse_blogspot_nl_2009_03_still_aliv.jpg
Original attached to this answer.
You could ask about his process.
You need detailed drawings which there are none!