This is not the sexiest drawing subject, but it is the foundation I use over and over again to build my sketches upon, the reliable set of wheels in perspective! They can be used to estimate the proportions of anything and should become a go-to asset in your toolset of drawing techniques if you are into drawing vehicles from your imagination. Referenced a few pages in my book How to Draw as a test to see if you like this kind of thing. Comments welcome! Have a nice week all and stay safe!