Oil Filter Diagram

Oil Filter Diagram

An automotive aftermarket manufacturer required a diagram illustration to show how a new type of cellulose fiber could filter automotive oil better than previous competitive products. This is a sepia line art drawing on D’Arches watercolor paper, with Windsor...
Scientific Optical Diagrams

Scientific Optical Diagrams

Randal did a series of scientific illustrations for Dr. John Delly, scientific advisor to the McCrone company in Westmont, Illinois. This diagram of a Biaxial Indicatrix was used in a training manual for lab technicians to learn how to identify optical light...
1972 Datsun 240z

1972 Datsun 240z

This car I bought from a Frito-Lay executive that had moved up to the Chicago area from Texas, and brought the car with him. It was sitting in his garage with flat tires, a bad battery and a few other problems. I bought it “as is” and got it running and...
Buick Automotive Cutaway

Buick Automotive Cutaway

Randal created this technical line illustration of the side view of a Buick automobile to illustrate a computer-controlled automotive fuel system. The work was commissioned by a Chicago area ad agency in the...
Tugboat Isometric Cutaway

Tugboat Isometric Cutaway

Randal Birkey completed this isometric line drawing of a tugboat as a part of a series of illustrations for a ship and barge manufacturing company. This cutaway reveals the bulkheads and inner structure of the...