I scanned these drawings and rotated them to the appropriate orientation, but for some reason they will not maintain said orientation when I place them here. Sorry for the inconvenience.

Refined designs.

30 thumbnails.

My big picture goal is to be able to draw anything I choose from imagination ,on a professional level, without any reference. The main problems I have that require perspective skills are drawing ellipses that look correct and when I finish a perspective drawing ,say something like a car, it looks like a five year old drew it.

Personal project

Couldn't find the original tank reference photo, so I used this one.