This Mercedes aircraft service vehicle is a simplified illustration taken from a few photographs. Nothing about it was drawn precisely, yet even so the end result is very good. These illustrations took little over an hour. Sometimes it's necessary to create helix-based objects. IsoCalc 3 makes it look good, and easy.
Screw threads are a sticky subject in technical illustrations.
The illustrator has to balance speed and print quality with accuracy and realism. It's not often that a true representation of a helical thread is required. It is possible to do a very life-like representation with IsoCalc 3, though. With IsoCalc, it takes hardly any effort at all. It's colourful parts make it an icon in a busy office.