Field guide No. 560

Inside an oily green gearbox, a flat spur gear and an upright one pass straight through each other, teeth sliding through teeth with no gap to spare. The machine runs fine; the drawing would not.

Impossible gearbox interlock

Meshing, technically.

Inside an oily green gearbox, a flat spur gear and an upright one pass straight through each other, teeth sliding through teeth with no gap to spare. The machine runs fine; the drawing would not.

Field noteTwo solid gears cannot occupy one space. These pass straight through each other’s teeth.

Specimen
No. 560
Kind
Impossible (the round square kind)
Breaks
Physics
Where it doesn’t exist
An oily green gearbox.
Nearest existing relative
A gear train.
Filed in Fresh slop as
Objects

Also impossible, also breaking physics