Grimes Flying Lab
This sketch depicts the Grimes Flying Lab, a 1952 Beech 18 that served as an aviation lighting test mule for the Grimes Manufacturing Company. The aircraft now resides at Grimes Field in Urbana, Ohio.
The drawing shows the aircraft at twilight with all the lights illuminated. This drawing is done on toned tan paper using Copic markers and Micron pens.
More information about the Grimes Flying Lab can be found here.