Panavia Tornado IDS (InterDiction-Strike), with Luftwaffe markings and Kormoran anti-ship missiles. March 22, 2011.
Not really a sketch, but a stippled drawing made with a rollerball pen. I made this for a design class last spring.
A more recent stippled drawing of an Air Force search and rescue helicopter. Stippling is very similar to half-tone printing in that the proximity of the dots to one another defines the lightness or darkness in the image.