I recently uploaded a video as part of a series we are doing on restoring an old Kent pattern axe. Many of the videos in the series (de-rusting etc.) are probably old news to most people here, so I won't bore you with them, but the third in the series may amuse some here. I was trying to describe the geometrical requirements for axe shapes to be effective at splitting, crosscutting and hewing & the only way I found to do it was wooden models and visual aids. ☺️ It is full on axe nerd, so if you want a laugh at me, it might while away a few minutes!