Sparkie flier under development

Here is one of the stages of development of the drawing for Sparkie's Flier. When I make a drawing I try to build it up from shapes that look like they might actually work. Rather than making a flat drawing I make it up of 3-dimensional appearing shapes. I also do this with my characters to bring more depth and weight to the drawings. All done in illustrator with a mouse. More changes do take place as I add the pilot.