I'm working on the latest in my Essential Mechanisms series. This time a 3:1 reduction gear.

Rather than just reprising the 2:1 gear I wanted to add a little extra. To that end, the new mechanism includes a crank which can be used to drive your characters.

Here's the gears and crank fitted into a box and ready to go.

I have all the photography and parts layouts done so the finished project should be on the website very shortly.