Re: Spudguns.
I think everyone knows someone who's built a spudgun capable of firing whole potatoes. At College, I knew two people who built them (firing apples through chickenwire is a fun way to make apple sauce, or just waste a lot of fruit).
But I think my design for the Spudder 500 would still shock a lot of people.
It's basically a potato chaingun. A breach-loading weapon, it's fueled by electricity, aerosols and potatos.
The potato drops into the loading port, where the bolt forces it forward into the barrel. As it moves forward, the ignition chamber within the bolt is filled with 'propellant', which is ignited when the bolt is fully forward. The bolt then moves backward to accept another spud.
The loading system proved to be a bit of a headache. Merely dropping spuds into the breach wouldn't always work (a large one might jam the bolt) so I came up with the idea of using sections of pipe preloaded with potato. However, the mag size would be limited. And preparing mags would be time-consuming.
So maybe a rotary breach block, a bit like a revolver, with a robotic loader at the bottom which would force the spud into the lowermost barrel.
The goal: 50spm (spuds per minute).