this post is dedicated to all of you writing to me on Facebook asking me for tips with the intention to improve your drawings. I have checked your drawings and I answered you to start from simple fundamental sketches to understand how we take a solid add wheels and draw it in several simple perspectives.
So this simple tutorial excercise is for you, you can see I put always minor and major axes for wheels correct perspective, light lines going to vanishing points, shadows to show how we can give depth and help perspective, some line quality using a contasted line weight on our solids.
The objective for you is to exercise using this layout, do it as many times you can to get used to it and move on a new excercise.
Hope you like them, enjoy!