Design Concept Doodles 01

Today I decided I should maybe look at doing some concept work to add to my portfolio. SO here are 3 ships jotted down and inked in 10~20min each. Colour took a bit longer so maybe 30 min each ship total. Some took longer than others but nothing serious. Wanted the time to be short. I want to concentrate mostly on concept work so I will likely be practicing a lot of line work to get myself back to speed.